JP2013078174A - Thermoelectric cogeneration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably convert solar energy into electric energy and to efficiently utilize solar energy according to the load on an electric power consumption unit.SOLUTION: A thermoelectric cogeneration system includes: a condensing unit; a heat collection unit; a reactor which reacts to generate heat as a reaction medium is produced through heat absorption reaction and supplied; an electric power generation device which receives the heat generated by the reactor and generates electric power; a reaction medium supply/discharge device which discharges the reaction medium from the reactor, and supplies the discharged reaction medium to the reactor; electric power demand prediction processing means of predicting the amount of solar radiation and a power demand; generatable electric power amount calculation processing means of calculating a generatable amount of electric power; necessary electric power amount calculation processing means of calculating a necessary amount of electric power; and mode selection processing means of selecting modes of heat storage and electric power generation on the basis of the generable amount of electric power and the necessary amount of electric power.

Description

  The present invention relates to a thermoelectric cogeneration system.

  2. Description of the Related Art Conventionally, a power generation unit that can convert solar energy into electric energy and use it has been provided.

  In the power generation unit, a heat accumulator is disposed adjacent to the thermoelectric conversion module, and solar energy is converted into electric energy by the thermoelectric conversion module while sunlight is applied to the thermoelectric conversion module. When the heat of solar energy is stored in the storage unit and sunlight is not irradiated to the thermoelectric conversion module, the heat energy of the heat stored in the storage unit is converted into electric energy by the thermoelectric conversion module, Electric energy is used in electric devices (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 7-7976

  However, in the conventional power generation unit, since the temperature of the heat accumulator cannot be adjusted, solar energy cannot be converted into electric energy stably.

  Moreover, solar energy cannot be used efficiently according to the load of the electrical equipment.

  The present invention solves the problems of the conventional power generation unit, can stably convert solar energy into electric energy, and can efficiently use solar energy according to the load of the power consumption unit. The purpose is to provide a thermoelectric cogeneration system.

  Therefore, in the thermoelectric cogeneration system of the present invention, a light collecting unit that collects sunlight, a heat collecting unit that converts the sunlight collected by the light collecting unit into heat, and collects the converted heat, and the collector An endothermic reaction is generated by receiving heat collected by the hot section, a reaction medium is generated, and a reaction medium is supplied to cause an exothermic reaction to generate heat, and heat generated in the reactor is generated. A power generation device that receives the power and sends the power to the power consumption unit; and a reaction medium supply / discharge device for discharging the reaction medium generated in the reactor from the reactor and supplying the discharged reaction medium to the reactor A solar radiation amount prediction processing means for predicting the solar radiation amount, a power demand prediction processing means for predicting a power demand for the power generation device, and a power generation possible power amount for calculating a power generation possible power amount based on the solar radiation amount Calculation A processing means, a required power amount calculation processing means for calculating a required power amount required in the power consumption unit based on the power demand, a heat storage in the reactor based on the power generation possible power amount and the required power amount, and Mode selection processing means for selecting a mode for generating power in the power generation apparatus.

  According to the present invention, in the thermoelectric cogeneration system, the light collecting unit that collects sunlight, the heat collecting unit that converts the sunlight collected by the light collecting unit into heat, and collects the converted heat, and the collector An endothermic reaction is generated by receiving heat collected by the hot section, a reaction medium is generated, and a reaction medium is supplied to cause an exothermic reaction to generate heat, and heat generated in the reactor is generated. A power generation device that receives the power and sends the power to the power consumption unit; and a reaction medium supply / discharge device for discharging the reaction medium generated in the reactor from the reactor and supplying the discharged reaction medium to the reactor A solar radiation amount prediction processing means for predicting the solar radiation amount, a power demand prediction processing means for predicting a power demand for the power generation device, and a power generation possible power amount for calculating a power generation possible power amount based on the solar radiation amount Calculation process Means, required power amount calculation processing means for calculating a required power amount required in the power consumption unit based on the power demand, and heat storage and power generation in the reactor based on the power generation possible power amount and the required power amount. Mode selection processing means for selecting a mode for generating power in the apparatus.

  In this case, the amount of power that can be generated is calculated based on the amount of solar radiation, the amount of required power is calculated based on the demand for power, and the heat storage in the reactor and the power generation in the power generation device are calculated based on the amount of power that can be generated and the amount of required power. Since the mode to be performed is selected, the solar energy can be converted into electric energy while being converted, and the solar energy can be efficiently used according to the load of the power consumption unit.

It is a control block diagram of the thermoelectric cogeneration system in the embodiment of the present invention. 1 is a conceptual diagram of a thermoelectric cogeneration system in an embodiment of the present invention. It is a 1st flowchart which shows operation | movement of the thermoelectric cogeneration system in embodiment of this invention. It is a 2nd flowchart which shows operation | movement of the thermoelectric cogeneration system in embodiment of this invention. It is a figure which shows the subroutine of the thermal storage heat processing in embodiment of this invention. It is a figure which shows the subroutine of the thermal storage electric power generation process in embodiment of this invention. It is a figure which shows the subroutine of the direct electric power generation process in embodiment of this invention. It is a figure which shows the subroutine of the thermal storage energy calculation process in embodiment of this invention. It is a figure which shows the subroutine of the direct heat radiation power generation process in embodiment of this invention. It is a figure which shows the subroutine of the thermal radiation power generation process in embodiment of this invention. It is a 1st figure which shows the subroutine of the cooperative control process in embodiment of this invention. It is a 2nd figure which shows the subroutine of the cooperative control process in embodiment of this invention. It is a figure which shows transition of the solar radiation amount estimated in embodiment of this invention. It is a figure which shows transition of the electric power demand estimated in embodiment of this invention. It is a figure for demonstrating operation | movement of the thermoelectric cogeneration system at the time of the thermal storage mode in embodiment of this invention. It is a figure for demonstrating operation | movement of the thermoelectric cogeneration system at the time of the thermal storage power generation mode in embodiment of this invention. It is a figure for demonstrating operation | movement of the thermoelectric cogeneration system at the time of the direct electric power generation mode in embodiment of this invention. It is a related figure of the thermal storage energy and reactor temperature in embodiment of this invention. It is a figure which shows the maximum thermal storage energy map in embodiment of this invention. It is a figure for demonstrating operation | movement of the thermoelectric cogeneration system at the time of the direct radiation power generation mode in embodiment of this invention. It is a figure for demonstrating operation | movement of the thermoelectric cogeneration system at the time of the thermal radiation power generation mode in embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a conceptual diagram of the thermoelectric cogeneration system according to the embodiment of the present invention.

  In the figure, reference numeral 11 denotes a thermoelectric cogeneration system. The thermoelectric cogeneration system 11 absorbs solar energy, that is, solar energy, and stores a solar energy absorption / heat storage unit 12 that stores heat, and the solar energy absorption / heat storage. The thermoelectric conversion unit 13 as a power generation device that receives heat from the unit 12, converts thermal energy into electric energy, and generates electric power, and the electric power generated by the thermoelectric conversion unit 13 is supplied and supplied with electric power An electric device Ld as a consumption unit, a heat recovery device 14 for recovering heat in the thermoelectric conversion unit 13, and a water tank 15 as a reaction medium storage unit for storing and storing water as a reaction medium formed by a heat insulating material. And a heat recovery device 16 for recovering heat in the water tank 15 and the solar energy absorption / heat storage unit 1 And the thermoelectric conversion unit 13 via the first piping system 21, and the thermoelectric conversion unit 13 and the heat recovery device 14 via the second piping system 22, the solar energy absorption / heat storage unit 12 and the water tank 15 Is connected to the water tank 15 and the heat recovery device 16 via the fourth piping system 24. The water tank 15 and the third piping system 23 constitute a reaction medium supply / discharge device. In the figure, one electric device Ld is connected to the thermoelectric conversion unit 13, but a plurality of electric devices are actually connected.

  The solar energy absorption / heat storage unit 12 is a light collecting unit 31 that collects sunlight, irradiated with sunlight collected by the light collecting unit 31, converts the sunlight into heat, and collects the converted heat. 32, and a reactor 33 or the like as a heat storage unit that stores and dissipates heat collected by the heat collection unit 32. The condensing unit 31 is a transparent material, and in the present embodiment, the heat collecting unit 32 is disposed outside the hermetically sealed casing 41 made of glass. The reactor 33 is formed in a space surrounded by the casing 32 and the casing 41. The casing 41 has a double wall structure composed of an outer wall and an inner wall, and the space between the outer wall and the inner wall is evacuated or filled with a noble gas. Insulation is performed. The inner peripheral surface of the inner wall of the housing 41 is coated with a film that reflects long-wavelength infrared light. A heat insulating material other than glass can be used for the housing 41, but it is preferable to use a transparent material, for example, glass, as the heat insulating material for the portion facing the light collecting portion 31. And, a predetermined heat dissipation gas can be injected into the space between the outer wall and the inner wall. When a voltage is applied to the injected gas, the color of the gas changes accordingly. , Heat dissipation is prevented.

  A pressure adjustment valve 43 as a pressure adjustment unit for adjusting the reactor pressure in the reactor 33 is disposed at a predetermined location of the casing 41. By operating the pressure regulating valve 43 to adjust the reactor pressure in the reactor 33 to be constant, the temperature of the reactor 33 (hereinafter referred to as “reactor temperature”) T is changed to the amount of solar radiation. It can be maintained at a corresponding temperature of 250 [° C.] or higher and 300 [° C.] or lower (hereinafter referred to as “heat storage temperature”) T1 [° C.], for example, 250 [° C.].

  The condensing part 31 is formed by arranging a plurality of lenses 35 in a matrix, and the surface of each lens 35 is covered with an antireflection film so that sunlight is not reflected. In addition, in this Embodiment, although the condensing part 31 and the heat collecting part 32 are arrange | positioned, only the heat collecting part 32 can be arrange | positioned.

  Further, on the surface of the heat collecting part 32, in order to increase the absorption efficiency of the infrared component of sunlight and reduce the heat loss due to radiation, a selective absorption film, for example, an infrared reflection preventing layer, an absorption / heat storage layer, and the like. A membrane consisting of is coated. The adsorption / heat storage layer can be formed by roughing the surface of a material, or can be formed by coating a film such as a nanotube black body or a metal black body.

The reactor 33 has a porous structure and is an inorganic material of magnesium oxide / water (MgO / H ₂ O), calcium chloride / methylamine (CaCl ₂ / CH ₃ NH ₂ ), calcium oxide / water. In the present embodiment, heat storage material (chemical heat storage material) such as (CaO / H ₂ O), calcium oxide / lead oxide / carbon dioxide (CaO / PbO / CO ₂ ), or magnesium oxide / water in the casing 41 Formed by filling.

In addition, when using magnesium oxide / water, calcium oxide / water, etc. as a heat storage material, when water uses calcium chloride / methylamine, methylamine is calcium oxide / lead oxide / carbon dioxide (CaO / PbO / In the case of using CO ₂ ), carbon dioxide is used as a reaction medium, and magnesium oxide, calcium oxide, calcium chloride, and calcium oxide / lead oxide are used as reaction materials.

Magnesium oxide / water is a reversible reaction between magnesium hydroxide and magnesium oxide,
Mg (OH) ₂ ⇔MgO + H ₂ O
To store and dissipate heat. Therefore, in the reactor 33, when magnesium hydroxide is heated by the heat collected by the heat collecting unit 32,
Mg (OH) ₂ → MgO + H ₂ O
In other words, an endothermic reaction occurs, magnesium oxide and water are generated, and heat is stored accordingly. In the endothermic reaction, water is vaporized to be generated in the form of reaction medium vapor, in the present embodiment, water vapor.

When water is added to magnesium oxide,
MgO + H ₂ O → Mg (OH) ₂
That is, an exothermic reaction occurs, magnesium hydroxide is generated, heat is generated, and heat is released. In the exothermic reaction, water vapor is liquefied and generated in a reaction medium solution, that is, in the present embodiment, water.

  In addition to the inorganic material, a heat storage material made of an adsorbent, a hydrogen storage alloy, an organic material, or the like can be used.

In the present embodiment, a bismuth tellurium (Bi ₂ Te ₃ ) thermoelectric module is used for the thermoelectric converter 13. The thermoelectric module includes a high temperature part Hp made of a metal plate, an n-type semiconductor, a p-type semiconductor, and a low temperature part Lp made of a metal plate, and the low temperature part Lp is heated by heating the high temperature part Hp and cooling the low temperature part Lp. The current flows in the order of the Lp metal plate, the n-type semiconductor, the high-temperature portion Hp metal plate, the p-type semiconductor, and the low-temperature portion Lp metal plate. In the present embodiment, for example, the power generation efficiency when the high temperature portion Hp is 250 [° C.] and the low temperature portion Lp is 30 [° C.] is 6 [%].

  The first piping system 21 includes a heat exchanger he1 embedded in the reactor 33, a heat exchanger he2 disposed in contact with the high temperature portion Hp, and the heat exchanger he1. , He2 are provided with on-off valves vb1, vb2 as first and second valves.

  The second piping system 22 includes a heat exchanger he3 disposed in the low temperature part Lp, the heat recovery device 14, and a heat exchanger he3 disposed between the heat recovery device 14 and the heat recovery device 14. 3. Open / close valves vb3 and vb4 as fourth valves are provided.

  Further, the third piping system 23 collects the water vapor generated by the endothermic reaction in the reactor 33 and supplies the water tank 15 with a water vapor discharge pipe 45 as a reaction medium discharge pipe for discharging to the water tank 15. A water supply pipe 46 serving as a reaction medium supply pipe for supplying the stored and stored water to the reactor 33, and a fifth position having a check valve structure disposed at a predetermined position in the water vapor discharge pipe 45. A pressure valve vb5 serving as a valve, an on-off valve vb6 serving as a sixth valve disposed at a predetermined position in the water supply pipe 46, and the like.

  In the steam discharge pipe 45, the pressure valve vb5 is opened by the pressure difference between the pressure upstream of the pressure valve vb5, that is, the pressure on the reactor 33 side, and the downstream side of the pressure valve vb5, that is, the pressure on the water tank 15 side. The water vapor flows into the water tank 15, but an opening / closing valve is provided in the water vapor discharge pipe 45 in place of the pressure valve vb5, and the water vapor flows by opening the opening / closing valve by a solenoid or the like. it can. In the water supply pipe 46, the water in the water tank 15 is supplied to the reactor 33 by its own weight. However, a pump is provided and supplied to the reactor 33 by the pump. it can. In the present embodiment, the pressure in the reactor 33 is lowered by opening a pressure release valve (not shown) disposed in the housing 41, and the supply of water to the reactor 33 by its own weight is promoted. ing.

  A discharge portion 45a is formed in a portion of the casing 41 of the water vapor discharge pipe 45, and a plurality of holes (not shown) for collecting and discharging water vapor in the discharge portion 45a are formed in the discharge portion 45a. A supply part 46a is formed in a part of the casing 41 of the water supply pipe 46, and a plurality of holes (not shown) are formed in the supply part 46a for supplying water into the reactor 33 and ejecting it. The Spray nozzles are disposed in the holes of the supply unit 46a, and water is injected into the reactor 33 by the spray nozzles.

  The fourth piping system 24 is disposed in the water tank 15, and heat exchanger he4 for condensing the water vapor discharged to the water tank 15 into water, the heat exchanger he4 and the heat exchanger On-off valves vb7 and vb8 are provided as seventh and eighth valves disposed between the collecting device 16 and the recovery device 16.

  Next, the control device of the thermoelectric cogeneration system 11 having the above configuration will be described.

  FIG. 1 is a control block diagram of a thermoelectric cogeneration system according to an embodiment of the present invention.

  In the figure, 50 is a control unit that controls the entire thermoelectric cogeneration system 11, 51 is an operation unit that includes operation elements such as keys and buttons not shown, and 52 is a display that includes display elements such as LED screens that are not shown. Reference numeral 65 denotes a storage unit serving as a first storage device for recording predetermined information.

  The control unit 50 includes a CPU as a calculation unit (not shown) that functions as a computer, a RAM as a first storage device (not shown), and a memory such as a ROM as a third storage device. The operation unit 51 can also be formed by a touch panel, and in that case, also functions as a display unit.

  Reference numeral 53 denotes a solar radiation amount sensor serving as a solar radiation amount detection unit for detecting the solar radiation amount, and reference numeral 53 denotes a solar radiation amount sensor disposed in the light collector 31 for detecting the temperature of the light collector 31. A condenser temperature sensor 55 serving as a temperature detector for light, 55 is disposed in the reactor 33, and a reactor temperature sensor 56 serving as a temperature detector for heat storage / radiation for detecting the reactor temperature T, A reactor pressure sensor 58, which is disposed in the reactor 33 and detects a reactor pressure in the reactor 33 as a pressure detector for heat storage and heat dissipation, 58 is disposed in the high temperature portion Hp, and the temperature of the high temperature portion Hp. A high-temperature part temperature sensor 59 serving as a first thermoelectric temperature detection unit for detecting the temperature is provided in the low-temperature part Lp, and a low temperature as a second thermoelectric temperature detection unit for detecting the temperature of the low-temperature part Lp. Temperature sensor, 43 is a pressure regulating valve, 60 is the electrical equipment Ld A power meter 61 serving as a power detection unit for detecting consumed power, 61 is a steam flow meter serving as a first flow rate detection unit disposed at a predetermined location of the steam discharge pipe 45 and detecting a flow rate of water vapor, 62 Is a water flow meter as a second flow rate detection unit that is disposed at a predetermined location of the water supply pipe 46 and detects the flow rate of water, 63 is disposed in the water tank 15, A tank temperature sensor 64 serving as a temperature detection unit for the reaction medium for detecting the temperature Tw is provided in the water tank 15, and a tank as a pressure detection unit for the reaction medium for detecting the pressure Pw in the water tank 15. The pressure sensors vb1 to vb4, vb6 to vb8 are open / close valves, and vb5 is a pressure valve. In the present embodiment, the solar radiation amount sensor 53 detects the solar radiation amount, but can detect the presence or absence of solar radiation.

  In the present embodiment, according to the load represented by the electric power supplied to the electric device Ld, the control unit 50 performs the heat storage mode as the first mode, the heat storage power generation mode as the second mode, and the third mode. A predetermined mode is selected from the direct power generation mode as the mode, the direct heat radiation power generation mode as the fourth mode, and the heat radiation power generation mode as the fifth mode. vb4 and vb6 are opened and closed, and the thermoelectric cogeneration system 11 is operated in the selected mode. In addition, the operator can operate the thermoelectric cogeneration system 11 in each mode by operating the operation unit 51 and manually opening and closing the pressure regulating valve 43 and the on-off valves vb1 to vb4 and vb6.

  Next, the operation of the thermoelectric cogeneration system 11 will be described.

  3 is a first flowchart showing the operation of the thermoelectric cogeneration system in the embodiment of the present invention, FIG. 4 is a second flowchart showing the operation of the thermoelectric cogeneration system in the embodiment of the present invention, and FIG. The figure which shows the subroutine of the thermal storage heat processing in embodiment of invention, FIG. 6 is the figure which shows the subroutine of the thermal storage electric power generation process in embodiment of this invention, FIG. 7 shows the subroutine of the direct electric power generation process in embodiment of this invention FIG. 8 is a diagram showing a subroutine of heat storage energy calculation processing in the embodiment of the present invention, FIG. 9 is a diagram showing a subroutine of direct heat radiation power generation processing in the embodiment of the present invention, and FIG. FIG. 11 is a diagram showing a subroutine of heat dissipation power generation processing in the embodiment, and FIG. 11 shows the support of cooperative control processing in the embodiment of the invention. FIG. 12 is a second diagram showing a subroutine of cooperative control processing in the embodiment of the present invention, and FIG. 13 is a diagram showing transition of predicted solar radiation amount in the embodiment of the present invention. FIG. 14 is a diagram showing a transition of predicted power demand in the embodiment of the present invention, and FIG. 15 is a diagram for explaining the operation of the thermoelectric cogeneration system in the heat storage mode in the embodiment of the present invention. 16 is a diagram for explaining the operation of the thermoelectric cogeneration system in the thermal storage power generation mode in the embodiment of the present invention, and FIG. 17 is a diagram for explaining the operation of the thermoelectric cogeneration system in the direct power generation mode in the embodiment of the present invention. FIG. 18 is a diagram showing the relationship between the heat storage energy and the reactor temperature in the embodiment of the present invention, and FIG. 19 is a diagram in the embodiment of the present invention. FIG. 20 is a diagram showing the maximum heat storage energy map, FIG. 20 is a diagram for explaining the operation of the thermoelectric cogeneration system in the direct heat radiation power generation mode in the embodiment of the present invention, and FIG. 21 is the heat radiation power generation mode in the embodiment of the present invention. It is a figure for demonstrating operation | movement of the thermoelectric cogeneration system at the time. In FIG. 13, time is plotted on the horizontal axis, solar radiation amount Psun [kW] on the vertical axis, time on the horizontal axis in FIG. 14, power demand Pe [kW] on the vertical axis, and reactor on the horizontal axis in FIG. The heat storage energy E [kWh] is taken as the reactor temperature T [° C.] on the vertical axis.

  First, a solar radiation amount prediction processing unit (not shown) of the control unit 50 performs a solar radiation amount prediction process, obtains an observation value of the solar radiation amount, weather hygiene image data, and the like at a location where the thermoelectric cogeneration system 11 is disposed, The solar radiation amount Psun [kW] is predicted based on the inclination angle, area, and the like of the light unit 31 (step S1). In this case, as shown in FIG. 13, a change over time of the amount of solar radiation Psun [kW] for a predetermined number of days, in the present embodiment, every predetermined time over the present day and the next day is predicted, and the storage unit 65 The solar radiation amount Psun [kW] and the time are recorded in the solar radiation amount map formed in FIG.

  The power demand prediction processing means (not shown) of the control unit 50 performs power demand prediction processing, and predicts the power demand Pe [kW] for the thermoelectric conversion unit 13 of the thermoelectric cogeneration system 11 (step S2). In this case, as shown in FIG. 14, a change over time of the power demand Pe [kW] for each predetermined time over the predetermined number of days, in the present embodiment, over the present day and the next day is predicted and stored in the storage unit 65. In the formed power demand map, the power demand Pe [kW] and the time are recorded in association with each other.

  The storage unit 65 is made to correspond to, for example, actual power used at home, that is, actual power and time, and further correspond to the day's weather (outside temperature, room temperature, humidity, weather, etc.). And recorded as actual power demand data. Then, the power demand prediction processing means refers to the actual power demand data, refers to the weather forecast for today and the next day, and calculates the power demand Pe [kW] based on the power demand data and the weather forecast.

  Subsequently, a first power-generating power amount calculation processing unit (not shown) of the control unit 50 performs a first power-generating power amount calculation process, and can generate power based on the amount of solar radiation Psun [kW] in a predetermined time zone. A quantity Wc [kWh] is calculated (step S3). Therefore, the first power-generating power amount calculation processing means includes the temperature TH [° C.] of the high temperature part Hp detected by the high temperature part temperature sensor 58 and the temperature of the low temperature part Lp detected by the low temperature part temperature sensor 59. TL [° C.] is acquired, and the solar radiation amount Psun [kW] in the predetermined time zone is acquired from the solar radiation amount map. Subsequently, the first power-generating power amount calculation processing means refers to the power-generating power amount map formed in the storage unit 65, and determines the temperature TH [° C.], TL [° C.], and a predetermined time zone. A power generation possible electric energy Wc [kWh] corresponding to the solar radiation amount Psun [kW] is calculated. That is, the power generation possible power Wc [kWh] is determined by the specifications of the power generation module, the temperature TH [° C.], TL [° C.], and the input heat flow.

  In addition, the temperature TH [° C.], the TL [° C.], the solar radiation amount Psun [kW], and the power generation possible power amount Wc [kWh] are recorded in the generated power amount map. In the present embodiment, default values are used until the temperatures TH [° C.] and TL [° C.] reach a steady state. In this case, the default value of the temperature TH [° C.] is determined by the reactor temperature and the heat exchange capability of the heat exchanger he2, and the default value of the temperature TL [° C.] is preferably set to a temperature near room temperature. In the present embodiment, the default values of the temperatures TH [° C.] and TL [° C.] are set to 250 [° C.] and 30 [° C.], respectively.

  Subsequently, a required power amount calculation processing unit (not shown) of the control unit 50 performs a required power amount calculation process, acquires the power demand Pe [kW] in the predetermined time zone from the power demand map, and the power demand Based on Pe [kW], the required power amount We [kWh] required in the electrical equipment Ld and the like is calculated.

  A first power amount determination processing unit (not shown) of the control unit 50 performs a first power amount determination process to determine whether the required power amount We [kWh] is smaller than the threshold value Weth1 [kWh] ( Step S4).

  When the required power amount We [kWh] is smaller than the threshold value Weth1 [kWh], the power purchase processing means (not shown) of the control unit 50 performs power purchase processing and purchases a predetermined amount of power from the commercial power provider. (Step S5).

  By the way, when power is generated by the thermoelectric conversion unit 13 when the power consumption is low, the power generation efficiency is lowered. Therefore, the thermoelectric conversion unit 13 generates power during the day when the power consumption is high, and at night when the power consumption is low. It is desirable that the thermoelectric converter 13 does not generate power. Therefore, in the present embodiment, the power purchase processing means purchases power from a commercial power provider at night when the thermoelectric converter 13 is not used.

Subsequently, a heat storage necessity determination processing unit (not shown) of the control unit 50 performs a heat storage necessity determination process to determine whether or not heat storage is necessary (step S6). Then, when the amount of heat stored in the reactor 33, that is, the amount of stored heat is Qi [kWh], and the amount of heat that escapes from the reactor 33, that is, the amount of radiated heat is Qo [kWh], the amount of stored heat is Qi [kWh]. Ratio ρ of radiated heat Qo [kWh]
ρ = Qo / Qi
Is less than the threshold value ρth1, it is determined that heat storage needs to be performed, and when the ratio ρ is greater than the threshold value ρth1, it is determined that heat storage need not be performed.

  For example, when the weather is sunny and the amount of solar radiation Psun [kW] is large and the ratio ρ is less than or equal to the threshold ρth1, it is determined that heat storage is necessary, and the amount of solar radiation Psun [kW] is determined when the weather is cloudy, rainy, snowy, etc. When the ratio ρ is larger than the threshold ρth1, it is determined that it is not necessary to perform heat storage.

  And when it is necessary to perform heat storage, the heat storage means as the first mode selection processing means (not shown) of the control unit 50 performs heat storage as the first mode selection processing and stores heat in the reactor 33. (Step S7).

  Therefore, the heat storage temperature setting processing means of the heat storage means performs a heat storage temperature setting process, and sets the heat storage temperature T1 [° C.] according to the solar radiation amount Psun [kW] (step S7-1). That is, the heat storage means obtains the solar radiation amount Psun [kW] from the solar radiation amount map, calculates the total daily solar radiation amount ΣPsun [kWh], and refers to the heat storage temperature map formed in the storage unit 65, The heat storage temperature T1 [° C.] corresponding to the total solar radiation amount ΣPsun [kWh] is read out.

  In the heat storage temperature map, the total solar radiation amount ΣPsun [kWh] and the heat storage temperature T1 [° C.] are recorded in correspondence.

  Subsequently, the heat storage setting processing means as the mode setting processing means of the heat storage means performs a heat storage setting process as a mode setting process (step S7-2). Therefore, the heat storage setting processing means adjusts the opening degree of the pressure adjusting valve 43, closes the on-off valves vb1 to vb4, vb6, opens the on-off valves vb7, vb8, and operates the thermoelectric cogeneration system 11 in the heat storage mode. . In the heat storage mode, the sunlight collected by the light collecting unit 31 is irradiated to the heat collecting unit 32 (arrow A in FIG. 15), and the sunlight irradiated to the heat collecting unit 32 is converted into heat and converted. Heat is transferred to the reactor 33 and the reactor 33 is heated. As a result, the reactor temperature T [° C.] is maintained at the heat storage temperature T1 [° C.].

And the reactor 33 is made to function as a heat storage apparatus, and magnesium hydroxide is heated in the reactor 33,
Mg (OH) ₂ → MgO + H ₂ O
Endothermic reaction occurs, and magnesium oxide and high-temperature water are generated in the state of water vapor. Thereby, heat storage is performed in the reactor 33.

  The generated water vapor is collected by the discharge unit 45a and discharged to the water tank 15 (arrow B in FIG. 15). At this time, the pressure valve vb5 is opened by the pressure of water vapor. In addition, since the reactor 33 has a porous structure, water vapor is circulated through the reactor 33 and is smoothly collected in the discharge part 45a.

  The water vapor discharged to the water tank 15 is cooled and condensed by water (cooling water) as a heat recovery medium by the heat exchanger he4, and when the reactor pressure in the reactor 33 is 1 atm. It becomes 100 [° C] water. The cooling water is heated as the water vapor condenses, and is sent to the heat recovery device 16, where heat is recovered. In addition, the heat | fever collect | recovered in the heat recovery apparatus 16 can be stored in a building frame, a floor, etc. as needed, and can be utilized for heating. In the heat recovery device 16, a refrigerant can be used as a heat recovery medium.

  In this case, the heat storage means maintains the reactor pressure in the reactor 33 at a constant value by adjusting the opening of the pressure regulating valve 43. Thereby, the pressure of water vapor becomes constant, and the heat of condensation in the water tank 15 becomes constant, so that the heat recovery device 16 can recover heat at a constant temperature.

  And the temperature judgment processing means of the said heat storage means performs temperature judgment processing, acquires the reactor temperature T [° C.] detected by the reactor temperature sensor 55, and the reactor temperature T [° C.] It is determined whether the temperature is higher than the maximum temperature determined by the specification of the device 33, that is, the system design allowable temperature Tmax [° C.] (step S7-3). When the reactor temperature T [° C.] is higher than the system design allowable temperature Tmax [° C.], the shut-off processing means of the heat storage means performs a shut-off process, and prevents heat dissipation between the outer wall and the inner wall of the casing 41. Gas is injected and a voltage is applied to the gas (step S7-4). Thereby, heat dissipation of the reactor 33 is prevented. In order to prevent heat dissipation of the reactor 33, an opening / closing window is provided outside the light collecting unit 31 in place of gas injection between the outer wall and the inner wall of the casing 41. By closing, heat dissipation of the reactor 33 can be prevented.

  Further, in the first power amount determination process, when it is determined that the required power amount We [kWh] is equal to or greater than the threshold value Weth1 [kWh], the second power amount determination processing unit (not shown) of the control unit 50 includes: A second power amount determination process is performed to determine whether or not the power generation possible power amount Wc [kWh] is larger than the required power amount We [kWh] (step S9).

  When the power generation possible power amount Wc [kWh] is larger than the required power amount We [kWh], the heat storage power generation processing unit as the second mode selection processing unit (not shown) of the control unit 50 performs the heat storage as the second mode selection processing. A power generation process is performed, heat is stored in the reactor 33, and power is generated in the thermoelectric converter 13 (step S10).

  For this purpose, the heat storage power generation setting processing means as the mode setting processing means of the heat storage power generation processing means performs the heat storage power generation setting processing as the mode setting processing, opens the on-off valves vb1 to vb4, vb7, vb8, and the thermoelectric cogeneration system 11 Are operated in the heat storage power generation mode (step S10-1). In the heat storage power generation mode, the light collecting unit 31 irradiates the collected sunlight to the heat collecting unit 32 (arrow C in FIG. 16), and the heat collecting unit 32 converts the irradiated sunlight into heat, and converts the converted heat. Transmit to the reactor 33.

In this case, the reactor 33 formed of the heat storage material is caused to function as a heat transfer member, and in the reactor 33, in the present embodiment, a predetermined ratio of the heat transferred from the heat collection unit 32, Magnesium hydroxide is heated by 50%,
Mg (OH) ₂ → MgO + H ₂ O
Endothermic reaction occurs, and magnesium oxide and high-temperature water are generated in the state of water vapor. Thereby, heat storage is performed in the reactor 33.

  The generated water vapor is collected in the discharge part 45a and discharged to the water tank 15 (arrow D in FIG. 16). At this time, the pressure valve vb5 is opened by the pressure of water vapor.

  And the water vapor | steam discharged | emitted by the water tank 15 is cooled with the cooling water as a heat recovery medium with the heat exchanger he4, is condensed, and turns into 100 [degreeC] water. The cooling water is heated as the water vapor condenses, and is sent to the heat recovery device 16, where heat is recovered.

  Further, since the reactor 33 also functions as a heat transfer member, the remainder of the heat transferred from the heat collecting section 32, that is, 50 [%] is transferred as it is to the heat exchanger he1 (FIG. 2) ( Arrow E) in FIG.

  And the heat transmitted to heat exchanger he1 is transmitted to the water as a heat transfer medium, is transmitted to high temperature part Hp by heat exchanger he2, and heats high temperature part Hp. Moreover, the low temperature part Lp is cooled with the cooling water as a heat recovery medium by the heat exchanger he3. The cooling water is heated by the low temperature part Lp, sent to the heat recovery device 14, and heat is recovered in the heat recovery device 14.

  Then, the heat storage power generation setting processing means refers to the power generation possible power amount map, and the temperature TH [corresponding to the required power amount We [kWh], the temperature TL [° C.] and the solar radiation amount Psun [kWh] in a predetermined time zone. ° C] is calculated and set. Then, when the high temperature part Hp is heated and the low temperature part Lp is cooled, the power generation processing means of the thermal storage power generation processing means performs power generation processing and performs power generation in the thermoelectric conversion unit 13, and the temperature and low temperature of the high temperature part Hp. A current corresponding to the temperature difference from the temperature of the part Lp is generated (step S10-2). Therefore, the current can be sent to the electric device Ld and the electric power can be used in the electric device Ld and the like.

  In this case, the heat storage power generation processing means adjusts the opening degree of the on-off valves vb1 and vb2, and sets the amount of water flowing through the heat exchangers he1 and he2, so that the heat transferred from the heat collection unit 32 is Adjust the rate of heat used to heat the magnesium hydroxide.

  And the temperature judgment processing means of the said thermal storage power generation processing means performs temperature judgment processing, acquires the reactor temperature T [° C.] detected by the reactor temperature sensor 55, and the reactor temperature T [° C.] It is determined whether the temperature is higher than the maximum temperature determined by the specification of the device 33, that is, the system design allowable temperature Tmax [° C.] (step S10-3). When the reactor temperature T [° C.] is higher than the system design allowable temperature Tmax [° C.], the shut-off processing means of the heat storage means performs a shut-off process, and prevents heat dissipation between the outer wall and the inner wall of the casing 41. Gas is injected and a voltage is applied to the gas (step S10-4).

  In the second power amount determination process, when it is determined that the power generation possible power amount Wc [kWh] is equal to or less than the required power amount We [kWh], the second power amount determination processing means can generate power. It is determined whether the power amount Wc [kWh] is equal to the required power amount We [kWh] (step S11).

  When the power generation possible power amount Wc [kWh] and the required power amount We [kWh] are equal, the direct power generation processing unit as the third mode selection processing unit (not shown) of the control unit 50 performs the third mode selection processing. Then, heat is transferred to the high-temperature part Hp without generating heat in the reactor 33, and power is generated in the thermoelectric converter 13 (step S12).

  Therefore, the direct power generation setting processing means as the mode setting processing means of the direct power generation processing means performs the direct power generation setting processing as the mode setting processing, opens the on-off valves vb1 to vb4, closes the on-off valves vb6 to vb8, and The generation system 11 is operated in the direct power generation mode (step S12-1). In the direct power generation mode, the sunlight collected by the light collecting unit 31 is irradiated to the heat collecting unit 32, the sunlight irradiated to the heat collecting unit 32 is converted into heat, and the converted heat is supplied to the reactor 33. Although transmitted, the reactor 33 is caused to function as a heat transfer member, neither endothermic reaction nor exothermic reaction occurs, and the transmitted heat is directly transmitted to the heat exchanger he1 (arrow F in FIG. 17). .

  And the heat transmitted to heat exchanger he1 is transmitted to the water as a heat transfer medium, is transmitted to high temperature part Hp by heat exchanger he2, and heats high temperature part Hp. At this time, the temperature TH [° C.] of the high temperature portion Hp is set to a default value. Moreover, the low temperature part Lp is cooled with the cooling water as a heat recovery medium by the heat exchanger he3. The cooling water is heated by the low temperature part Lp, sent to the heat recovery device 14, and heat is recovered in the heat recovery device 14.

  Then, when the high temperature part Hp is heated and the low temperature part Lp is cooled, the power generation processing means of the direct power generation processing means performs power generation processing and performs power generation in the thermoelectric conversion unit 13 so that the temperature and the low temperature of the high temperature part Hp are reduced. A current corresponding to the temperature difference from the temperature of the part Lp is generated (step S12-2). Therefore, the current can be sent to the electric device Ld and the electric power can be used in the electric device Ld and the like.

  In this case, since the reactor 33 has a porous structure, the water vapor is circulated through the reactor 33 and smoothly transfers heat.

  By the way, if the electric power that can be generated Wc [kWh] is smaller than the required electric energy We [kWh], the electric energy that can be used in the electrical equipment Ld and the like is insufficient.

  Therefore, in the present embodiment, power is generated by the thermoelectric conversion unit 13 using the amount of heat stored in the reactor 33.

  Therefore, in the second power amount determination process, when it is determined that the power generation possible power amount Wc [kWh] is smaller than the required power amount We [kWh], the storage energy calculation processing means (not shown) of the control unit 50 is A heat storage energy calculation process is performed to calculate the amount of heat stored in the reactor 33, that is, heat storage energy (step S13).

  Here, the characteristic of the reactor 33, that is, the relationship between the heat storage energy E [kWh] of the reactor 33 and the reactor temperature T [° C.] will be described.

  In FIG. 18, T1 [° C.] is the heat storage temperature, Tmin [° C.] is the lowest temperature at which the reactor 33 can be used, and Tmax [° C.] is the system design allowable temperature.

  L is a line indicating the state of the heat storage material, and the heat storage material falls within the first region where the reactor temperature T [° C.] is equal to or higher than the minimum temperature Tmin [° C.] and lower than the heat storage temperature T1 [° C.]. Magnesium hydroxide Mg (OH) is placed between the points a and b, and the magnesium hydroxide is placed between the points b and c where the reactor temperature T [° C.] falls within the second region equal to the heat storage temperature T1 [° C.]. Third region where Mg (OH) and magnesium oxide MgO are mixed, the reactor temperature T [° C.] is higher than the heat storage temperature T1 [° C.], and the system design allowable temperature Tmax [° C.] or less Is placed in the state of magnesium oxide MgO between the points c and d that fall within the range. In addition, between the points b and c, the closer to the point b, the more magnesium hydroxide Mg (OH), and the closer to the point c, the more magnesium oxide MgO.

The heat storage energy at point a of the reactor 33 is E1 [kWh], the heat storage energy at point b is E2 [kWh], the heat storage energy at point c is E3 [kWh], and the heat storage energy at point d is E4 [kWh]. kWh], when the reactor 33 is used while maintaining the reactor temperature T [° C.] at the heat storage temperature T1 [° C.] or more and the system design allowable temperature Tmax [° C.] or less, the heat storage energy E [kWh] Is
E2 ≦ E ≦ E4
When the reactor 33 is used while maintaining the reactor temperature T [° C.] above the minimum temperature Tmin [° C.] and below the system design allowable temperature Tmax [° C.], the heat storage energy E [ kWh] is
E1 ≦ E ≦ E4
The value Es ′ in the range is taken.

  Therefore, in order to calculate the heat storage energy E [kWh] of the reactor 33, the maximum heat storage energy calculation processing means of the heat storage energy calculation processing means performs the maximum heat storage energy calculation processing, reads the heat storage temperature T1 [° C.], The maximum heat storage energy at the heat storage temperature T1 [° C.], that is, the maximum heat storage energy Emax (= E3) [kWh] is calculated (step S13-1).

  For this purpose, the maximum heat storage energy calculation processing means refers to the maximum heat storage energy map in FIG. 19 and refers to the maximum heat storage energy Emax [corresponding to the heat storage temperature T1 [° C.] and the reactor pressure pc [Pa] in the reactor 33. kWh] is calculated. In the maximum heat storage energy map, the heat storage temperature T1 [° C.], the reactor pressure pc [Pa], and the maximum heat storage energy Emax [kWh] are recorded.

  Subsequently, the reactor temperature acquisition processing means of the heat storage energy calculation processing means performs the reactor temperature acquisition processing to acquire the reactor temperature T [° C.] (step S13-2), and the reactor temperature T [° C.]. Is determined in which of the first to third regions (steps S13-3 to S13-5).

When the reactor temperature T [° C.] falls within the first region, the calculation processing means of the heat storage energy calculation processing means performs calculation processing, and the heat storage energy Es, Es ′ [kWh]
Es = 0
Es ′ = Ch · | T1-Tmin |
Is calculated (step S13-6). Ch is the specific heat of magnesium hydroxide Mg (OH).

In addition, when the reactor temperature T [° C.] falls within the third region, the heat storage energy calculation processing means calculates heat storage energy Es, Es ′ [kWh]
Es = Emax + Co · | T−T1 |
Es ′ = Es + Co · | T−T1 |
Is calculated (steps S13-7, S13-8). Co is the specific heat of magnesium oxide MO.

  When the reactor temperature T [° C.] falls within the second region, the calculation processing means of the heat storage energy calculation processing means is magnesium hydroxide in a mixture of magnesium hydroxide Mg (OH) and magnesium oxide MgO. The ratio (number of moles) α of Mg (OH) is calculated (step S13-9). The ratio α is detected by the water flow meter 62 and can be calculated based on the flow rate of water flowing through the water supply pipe 46.

Subsequently, the calculation processing means stores the heat storage energy Es, Es ′ [kWh].
Es = Emax · (1−α)
Es ′ = Es + Co · | T−T1 |
Is calculated (steps S13-10 and S13-8).

  When the heat storage energy E (Es, Es ′) is calculated in this way, the second power-generating power amount calculation processing unit (not shown) of the control unit 50 performs a second power-generating power amount calculation process. The heat generation energy amount Wt [kWh] is calculated by adding the heat storage energy E (Es, Es ′) to the power generation amount Wc [kWh] based on the solar radiation amount Psun [kW] in the predetermined time zone (step S14). . In this case, the heat storage energy E (Es, Es ′) functions as the amount of power that can be generated.

  Subsequently, a third power generation possible power amount determination processing unit (not shown) of the control unit 50 performs a third power generation possible power amount determination process, and the power generation possible power amount Wt [kWh] is the required power amount We [kWh]. It is determined whether or not the above is true (step S15).

When the power generation possible power amount Wt [kWh] is equal to or greater than the required power amount We [kWh], the solar radiation amount determination processing unit (not shown) of the control unit 50 performs the solar radiation amount determination processing, and generates the power generation possible power amount Wc [kWh]. Acquired,
Wc> 0
It is determined whether or not there is solar radiation depending on whether or not (step S16).

  And when there is solar radiation, the direct heat radiation power generation processing means as the fourth mode selection processing means (not shown) of the control unit 50 performs the direct heat radiation power generation processing as the fourth mode selection processing and stores heat in the reactor 33. Without performing, heat is transmitted to the high temperature part Hp, heat is dissipated, and power is generated in the thermoelectric converter 13 (step S17).

  Therefore, the direct heat generation setting processing means as the mode setting processing means of the direct heat generation processing means performs the direct heat generation setting process as the mode setting process, opens the on-off valves vb1 to vb4, vb6, and the thermoelectric cogeneration system. 11 is directly operated in the heat radiation power generation mode (step S17-1). In the direct heat radiation power generation mode, the sunlight collected by the light collecting unit 31 is irradiated to the heat collecting unit 32 (arrow G in FIG. 20), and the sunlight irradiated to the heat collecting unit 32 is converted into heat and converted. The generated heat is transmitted to the reactor 33, but the reactor 33 is caused to function as a heat storage material and a heat transfer member, no endothermic reaction occurs, and the transferred heat is transferred to the heat exchanger he1 as it is.

  Further, the water in the water tank 15 is supplied into the reactor 33 through the water supply pipe 46 and is ejected (arrow H in FIG. 20).

Since the reactor 33 is formed of a heat storage material, water is added to the magnesium oxide in the reactor 33,
MgO + H ₂ O → Mg (OH) ₂
Exothermic reaction occurs, magnesium hydroxide is generated, and heat is generated.

  The heat transferred from the heat collecting part 32 to the reactor 33 and the heat generated in the reactor 33 are transferred to water as a heat transfer medium by the heat exchanger he1, transferred to the high temperature part Hp by the heat exchanger he2, The high temperature part Hp is heated. At this time, the temperature TH [° C.] of the high temperature portion Hp is set to a default value. Moreover, the low temperature part Lp is cooled with the cooling water as a heat recovery medium by the heat exchanger he3. The cooling water is heated by the low temperature part Lp, sent to the heat recovery device 14 (arrow J in FIG. 20), and heat is recovered in the heat recovery device 14.

  Then, when the high temperature part Hp is heated and the low temperature part Lp is cooled, the power generation processing means of the direct heat radiation power generation processing means performs power generation processing, generates power in the thermoelectric conversion unit 13, and generates the temperature of the high temperature part Hp. A current corresponding to the temperature difference from the temperature of the low temperature portion Lp is generated (step S17-2). Therefore, the current can be sent to the electric device Ld and the electric power can be used in the electric device Ld and the like.

  In this case, when the amount of water supplied to the reactor 33 or the flow velocity is set according to the amount of solar radiation by adjusting the opening degree of the on-off valve vb6, the direct heat radiation power generation processing means The reactor pressure [Pa] (water vapor partial pressure) becomes constant. Therefore, since the reactor temperature T is maintained at the heat storage temperature T1, the temperature difference between the high temperature portion Hp and the low temperature portion Lp can be maintained. As a result, power generation by the thermoelectric conversion unit 13 can be performed in a highly efficient temperature range. In addition, the opening degree of the pressure adjustment valve 43 can be adjusted together with adjusting the opening degree of the on-off valve vb6.

  Further, the direct heat radiation power generation processing means adjusts the opening degree of the on-off valve vb6 to thereby obtain a predetermined amount of heat transferred to the high temperature portion Hp, in this embodiment, 50 [%]. 32, and the remaining heat is the heat generated in the reactor 33.

  When it is determined that there is no solar radiation in the solar radiation amount determination processing, the heat radiation power generation processing means as the fifth mode selection processing means (not shown) of the control unit 50 performs the heat radiation power generation processing as the fifth mode selection processing. Then, heat is released in the reactor 33, and power is generated in the thermoelectric converter 13 (step S18).

  Therefore, the heat radiation power generation setting processing means as the mode setting processing means of the heat radiation power generation processing means performs the heat radiation power generation setting processing as the mode setting processing, opens the on-off valves vb1 to vb4, b6, and closes the on-off valves vb7, vb8. The thermoelectric cogeneration system 11 is operated in the heat radiation power generation mode (step S18-1). In the heat radiation power generation mode, the water in the water tank 15 is supplied into the reactor 33 through the supply pipe 46 (arrow K in FIG. 21) and ejected.

Since the reactor 33 is formed of a heat storage material, water is added to magnesium oxide in the reactor 33,
MgO + H ₂ O → Mg (OH) ₂
Exothermic reaction occurs, magnesium hydroxide is generated, and heat is generated.

  The heat generated in the reactor 33 is transferred to water as a heat transfer medium by the heat exchanger he1, transferred to the high temperature part Hp by the heat exchanger he2, and heats the high temperature part Hp. Moreover, the low temperature part Lp is cooled with the cooling water as a heat recovery medium by the heat exchanger he3. And this cooling water is heated by the low temperature part Lp, is sent to the heat recovery apparatus 14 (arrow L in FIG. 21), and heat is collect | recovered in the heat recovery apparatus 14. FIG. In addition, the heat recovered in the heat recovery device 14 can be stored in a building frame, a floor, or the like as needed, similarly to the heat recovery device 16, and used for heating. Further, in the heat recovery device 16, a refrigerant can be used as a heat recovery medium, or water heated to a predetermined temperature by geothermal heat can be used.

  Then, when the high temperature part Hp is heated and the low temperature part Lp is cooled, the power generation processing means of the heat dissipation power generation processing means performs power generation processing, generates power in the thermoelectric conversion unit 13, and the temperature and low temperature of the high temperature part Hp. A current corresponding to the temperature difference from the temperature of the part Lp is generated (step S18-2). Therefore, the current can be sent to the electric device Ld and the electric power can be used in the electric device Ld and the like.

  In this case, when the heat dissipation power generation processing means adjusts the opening degree of the on-off valve vb6 to make the amount or flow rate of water supplied to the reactor 33 constant, the reactor pressure [Pa] in the reactor 33 (Water vapor partial pressure) becomes constant. Therefore, since the reactor temperature T is maintained at the heat storage temperature T1, the temperature difference between the temperature of the high temperature portion Hp and the temperature of the low temperature portion Lp can be maintained constant. As a result, power generation by the thermoelectric conversion unit 13 can be performed in a highly efficient temperature range. The heat radiation power generation processing means can adjust the opening degree of the pressure adjusting valve 43 in conjunction with adjusting the opening degree of the on-off valve vb6.

  In the third power generation possible power amount determination process, when it is determined that the power generation possible power amount Wt [kWh] is smaller than the required power amount We [kWh], the cooperative control processing means (not shown) of the control unit 50 includes: A cooperative control process is performed, and the power amount deficient in the power generation possible power amount Wt [kWh] calculated based on the solar radiation amount Psun [kW] and the heat storage energy E (Es, Es ′) in the predetermined time zone is Supplementation is made with the amount of power purchased from the power provider (step S19).

  For this purpose, the power amount determination processing means of the cooperative control processing means performs the power amount determination processing and uses the power generation possible power amount Wc [kWh] and the heat storage energy E [kWh] based on the solar radiation amount Psun [kW]. It is determined whether or not it is possible (steps S19-1 to S19-3).

  When the power generation possible power amount Wc [kWh] and the heat storage energy E [kWh] can be used, the direct heat radiation power generation processing means of the cooperative control processing means performs the direct heat radiation power generation processing and directly radiates the thermoelectric cogeneration system 11 The operation is performed in the power generation mode (step S19-4).

  Then, the reactor temperature judgment processing means of the cooperative control processing means performs the reactor temperature judgment processing, and judges whether or not the reactor temperature T [° C.] is higher than the minimum temperature Tmin [° C.] (step S19-5). When the reactor temperature T [° C.] becomes equal to or lower than the minimum temperature Tmin [° C.], the power purchase processing means of the cooperative control processing means performs the power purchase processing and purchases the insufficient amount of power from the commercial power provider. (Step S19-6).

  Further, when the power generation possible electric power Wc [kWh] can be used and the heat storage energy E [kWh] cannot be used, the direct power generation processing means of the cooperative control processing means directly generates the thermoelectric cogeneration system 11. Operate in the mode (step S19-7).

  The reactor temperature determination processing means determines whether or not the reactor temperature T [° C.] is higher than the minimum temperature Tmin [° C.] (step S19-8), and the reactor temperature T [° C.] is the minimum temperature Tmin. [° C.] When the temperature falls below, the power purchase processing means purchases the power of the insufficient power amount from the commercial power provider (step S19-6).

  Further, when the power generation possible power Wc [kWh] cannot be used and the heat storage energy E [kWh] can be used, the heat radiation power generation processing means of the cooperative control processing means radiates the thermoelectric cogeneration system 11. The operation is performed in the power generation mode (step S19-9).

  The reactor temperature determination processing means determines whether or not the reactor temperature T [° C.] is higher than the minimum temperature Tmin [° C.] (step S19-10), and the reactor temperature T [° C.] is the minimum temperature Tmin. [° C.] When the temperature is below, the power purchase processing means purchases a predetermined amount of power from the commercial power provider (step S19-6).

  Further, when the power generation possible electric power amount Wc [kWh] and the heat storage energy E [kWh] cannot be used, the electric power purchase processing means purchases the electric power of the insufficient electric energy from the commercial electric power provider (Step S19- 6).

  And the solar radiation judgment processing means of the reactor temperature judgment processing means performs solar radiation judgment processing, judges whether or not the sun has gone down by the solar radiation amount sensor 53, and when the sun goes down, the reactor temperature judgment processing means The heat storage setting processing means performs a heat storage setting process, acquires the predicted total solar radiation amount ΣPsun [kWh] on the next day, and sets the heat storage in the reactor 33 in accordance with the total solar radiation amount ΣPsun [kWh] on the next day. .

  Therefore, the heat storage setting processing means sets the heat storage setting in the reactor 33 when the predicted total solar radiation amount ΣPsun [kWh] for the next day is sufficiently large and when there is almost no total solar radiation amount ΣPsun [kWh] for the next day. Do not do. When the predicted total solar radiation amount ΣPsun [kWh] on the next day is small, the heat storage temperature T1 [° C.] corresponding to the total solar radiation amount ΣPsun [kWh] is read with reference to the heat storage temperature map formed in the storage unit 65, A predetermined amount of power is purchased from a commercial power provider so that the reactor temperature T can be set to the heat storage temperature T1 [° C.].

  In this way, when the cooperative control process is completed, the time lapse determination processing means (not shown) of the control unit 50 performs the time lapse determination process, and the solar radiation amount Psun is calculated after the first power generation possible power amount calculation process is started. It waits for a preset time to elapse according to fluctuations in [kWh], power demand Pe [kW], etc., and when the preset time elapses, the first power generation amount calculation process is performed again (step) S20). The time lapse determination processing means lengthens the set time when the fluctuation of the power demand Pe [kW], the solar radiation amount Psun [kW], etc. is small, and shortens the set time when the fluctuation is large. Therefore, control is not repeated unnecessarily when fluctuations in the electric power demand Pe [kW], the solar radiation amount Psun [kW], etc. are small, and the control load applied to the control unit 50 can be reduced. Further, since the set time is shortened when the fluctuations in the power demand Pe [kW], the solar radiation amount Psun [kW], etc. are large, the control by the thermoelectric cogeneration system 11 can be performed with high accuracy.

  Thus, in the present embodiment, the power generation possible power amount Wc [kWh] is calculated based on the solar radiation amount Psun [kW], and the necessary power amount We [kWh] is calculated based on the power demand Pe [kW]. Since the mode for generating heat in the reactor 33 and generating electricity in the thermoelectric converter 13 is selected based on the electric power that can be generated Wc [kWh] and the required electric energy We [kWh], the solar energy is stabilized to electric energy. The solar energy can be used efficiently according to the load of the electric equipment Ld.

  In addition, the power generation possible electric energy Wt [kWh] is calculated based on the solar radiation amount Psun [kW] and the heat storage energy E [kWh] in the reactor 33, and the electric power generation possible electric energy Wt [kWh] and the necessary electric energy We [kWh]. ], The mode in which the heat storage and heat dissipation in the reactor 33 and the power generation in the thermoelectric converter 13 are selected is selected, so that solar energy can be used more efficiently according to the load of the electric device Ld.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

DESCRIPTION OF SYMBOLS 11 Thermoelectric cogeneration system 13 Thermoelectric conversion part 15 Water tank 23 3rd piping system 31 Condensing part 32 Heat collecting part 33 Reactor 50 Control part Ld Electric equipment

Claims (5)

A light collecting unit that collects sunlight;
A heat collecting unit that converts sunlight collected by the light collecting unit into heat and collects the converted heat;
A reactor that receives heat collected by the heat collecting section to cause an endothermic reaction, generates a reaction medium, is supplied with the reaction medium to cause an exothermic reaction, and generates heat;
A power generation device that receives heat generated in the reactor to generate power and sends the power to a power consumption unit;
A reaction medium supply / discharge device for discharging the reaction medium generated in the reactor from the reactor and supplying the discharged reaction medium to the reactor;
A solar radiation amount prediction processing means for predicting the solar radiation amount,
Power demand prediction processing means for predicting power demand for the power generation device;
A power generation capacity calculation processing means for calculating a power generation capacity based on the amount of solar radiation;
Based on the power demand, required power amount calculation processing means for calculating a required power amount required in the power consumption unit;
A thermoelectric cogeneration system comprising: mode selection processing means for selecting a mode for performing heat storage in the reactor and power generation in the power generation device based on the electric power that can be generated and the required electric energy. The power generation possible electric energy calculation processing means calculates the electric power generation possible electric energy based on the solar radiation amount and the heat storage energy in the reactor,
2. The thermoelectric cogeneration system according to claim 1, wherein the mode selection processing unit selects a mode in which heat is stored and released in the reactor and power is generated by a power generation device, based on the electric power that can be generated and the required electric energy. Power amount determination processing means for determining whether or not the power generation possible power amount is smaller than a threshold;
The thermoelectric cogeneration system according to claim 1, further comprising: a power purchase processing unit that purchases a predetermined amount of power from a commercial power provider when the amount of power that can be generated is smaller than a threshold. In addition to having heat storage necessity determination processing means for determining whether or not heat storage is necessary when electric power is purchased from a commercial power provider,
The thermoelectric cogeneration system according to claim 1, wherein when it is necessary to perform heat storage, the mode selection processing unit selects a mode for performing heat storage in the reactor.   Cooperative control processing means for purchasing power of a deficient amount of power from a commercial power provider when the amount of power that can be generated calculated based on the amount of solar radiation and heat storage energy in the reactor is smaller than the required amount of power The thermoelectric cogeneration system according to claim 1 or 2.

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