JP2016011821A - Adsorption heat pump system and cold generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adsorption heat pump system and a cold generation method capable of efficiently generating cold.SOLUTION: A heat pump 10 comprises: an evaporator 12; a high-temperature evaporator 13; a first main adsorber 14; a second main adsorber 16; a regeneration assist adsorber 18; and a condenser 20. During a cold generation mode, steam generated by adsorption heat of the first main adsorber 14 (second main adsorber 16) is supplied to the regeneration assist adsorber 18 and an assist adsorbent 18A is regenerated.

Description

  The present invention relates to an adsorption heat pump system and a cold heat generation method.

  As an adsorption heat pump, Patent Document 1 describes a configuration including a pair of adsorbers, a condenser, and an evaporator.

  In the adsorption heat pump having such a configuration, generally, the difference in adsorption amount per adsorbent per cycle can be increased by increasing the temperature difference between adsorption and desorption. By increasing the difference in the amount of adsorption / desorption, cold heat generation can be performed efficiently.

  Further, Non-Patent Document 1 describes that in the adsorption heat pump system, the desorption capability is enhanced by mounting the adsorbers in two stages.

JP 2010-151386 A

2013 Annual Meeting of the Japan Society of Refrigerating and Air Conditioning Engineers "Effect of Adsorber Flow Rate on Output of Adsorption Heat Pump Driven at 50 ° C"

  However, if the temperature difference between adsorption and desorption in the adsorber is large, sensible heat loss (amount of heat that cannot be used for actual energy exchange) increases. In an actual adsorption heat pump, it is desired to obtain cold energy more efficiently. Non-Patent Document 1 describes only connecting adsorbers divided into two stages. When regenerating the adsorbent of the adsorber, a heat source such as exhaust heat is required, but the heat source is also required to be used efficiently.

  This invention considers the said fact and makes it a subject to obtain the adsorption-type heat pump and cold-heat generation method which can produce cold-heat efficiently.

  An adsorption heat pump according to a first aspect of the present invention includes an evaporator that evaporates a heat medium, and generates heat of adsorption while adsorbing the heat medium from the evaporator that is in communication with the evaporator in a cold heat generation mode. Sometimes the adsorbed heat medium is desorbed at a main regeneration temperature to be first regenerated, and in the second regeneration mode, the main adsorber is configured to adsorb a heat medium from the main adsorber after the first regeneration. And a regeneration assist adsorber that is communicated with the main adsorber during the cold heat generation mode of the main adsorber and is heated by the adsorption heat of the main adsorber for assist regeneration. .

In the adsorption heat pump according to the first aspect, in the cold heat generation mode, cold heat is generated by evaporation of the heat medium in the evaporator. Further, the main adsorber communicated with the evaporator adsorbs the heat medium evaporated by the evaporator, and at this time, heat of adsorption is generated. The main adsorber is first regenerated by desorbing the adsorbed heat medium at the main regeneration temperature in the first regeneration mode.

On the other hand, the regeneration assist adsorber communicates with the main adsorber during the cold heat generation mode of the main adsorber and is heated by the adsorption heat of the main adsorber for assist regeneration. In the second regeneration mode, the main adsorber is second regenerated by adsorbing the heat medium from the main adsorber after the first regeneration.

  According to the adsorption heat pump of the first aspect, the relative pressure during the second regeneration can be made smaller than the relative pressure during the first regeneration by regenerating the main adsorber in communication with the regeneration assist adsorber. it can. Accordingly, more heat medium can be desorbed from the main adsorber in the regeneration mode, and cold heat can be efficiently generated in the cold mode.

  In addition, according to the adsorption heat pump according to the first aspect, since the second regeneration of the main adsorber is performed using the regeneration assist adsorber after the first regeneration, it is necessary to perform all regeneration of the main adsorber with the regeneration assist adsorber. There is no. Therefore, the amount of adsorption required for the regeneration assist adsorber can be reduced, and regeneration of the main adsorber can be efficiently assisted with a small capacity regeneration assist adsorber.

  Furthermore, since the regeneration assist adsorber is regenerated (assisted regeneration) using the heat of adsorption generated by the main adsorber, a separate heat source for assist regeneration is not required, and the amount of heat source used can be reduced.

  In the adsorption heat pump according to a second aspect, the main adsorber includes a first main adsorber and a second main adsorber respectively connected to the evaporator and the regeneration assist adsorber.

According to the adsorption heat pump of the second aspect, since the two main adsorbers are arranged in parallel between the evaporator and the regeneration assist adsorber, the cold generation and regeneration of the two main adsorbers are performed. By performing alternately, it is possible to perform continuous cold heat generation.

The adsorption heat pump according to claim 3 is configured such that the first regeneration and the second regeneration of the second main adsorber are performed when the heat medium is adsorbed by the first main adsorber. The regeneration assist adsorber is heated by the heat of adsorption from the second main adsorber during the first regeneration, and the assist regeneration is performed. When the heat medium is adsorbed by the second main adsorber, the first main adsorption is performed. The first regeneration and the second regeneration of the storage device are performed, and the assist regeneration of the regeneration assist adsorber is performed during the first regeneration of the first main adsorber.

According to the adsorption heat pump according to claim 3, continuous cold heat generation can be performed by alternately performing cold heat generation and first regeneration and second regeneration of the first main adsorber and the second main adsorber. it can. Further, the assist regeneration of the regeneration assist adsorber is performed at the first regeneration of the first main adsorber and at the first regeneration of the second main adsorber. Thus, by performing the regeneration of the regeneration assist adsorber, the regeneration assist adsorber can continuously perform the second regeneration of the main adsorber after the one main adsorber is first regenerated. Therefore, the second regeneration of the first main adsorber and the second main adsorber can be performed using one regeneration assist adsorber.

  The adsorption heat pump according to claim 4 is connected to the main adsorber, evaporates a heat exchange heat medium and supplies the heat exchange heat medium to the main adsorber, and raises the main adsorber to the main regeneration temperature by heat exchange. A high-temperature evaporator; and a heat transfer tank that receives the heat exchange heat medium from the main adsorber and heats the regeneration assist adsorber when the main adsorber is in a cold heat generation mode.

In the adsorption heat pump according to the fourth aspect, the main adsorber is heated and raised to the main regeneration temperature by supplying the heat exchange heat medium (gas phase state) evaporated by the high-temperature evaporator to the main adsorber. Further, in the cold heat generation mode, the regeneration assist adsorber can be heated by heating the heat exchange heat medium with the heat of adsorption of the main adsorber and supplying it to the regeneration assist adsorber.

The adsorption heat pump according to claim 5 is characterized in that the main adsorber and the regeneration assist adsorber are connected to a condenser that condenses the heat medium.

According to the adsorption heat pump according to claim 5, the main adsorber and the regeneration assist adsorber are connected to the condenser to condense the heat medium desorbed from the main adsorber and the regeneration assist adsorber, and the evaporator Can be sent to.

  The cold heat generation method according to claim 6 is to generate cold heat by evaporating the heat medium with an evaporator, generate heat of adsorption while adsorbing the heat medium with a main adsorber, and use the heat of adsorption to generate a regeneration assist adsorber. Is heated to assist regeneration, the adsorbed heat medium is desorbed from the main adsorber at the main regeneration temperature to first regenerate the main adsorber, and the heat medium from the main adsorber is regenerated after the first regeneration. The main adsorber is second regenerated by being adsorbed by the regeneration assist adsorber.

According to the cold heat generation method according to the sixth aspect, since the regeneration assist adsorber is heated and assisted regeneration is performed using the adsorption heat generated by the main adsorber, a heat source for assist regeneration is not required separately, The usage amount can be reduced.

Further, since the main adsorber is second regenerated by being adsorbed by the regeneration assist adsorber, more heat medium can be desorbed from the main adsorber. Thus, by using the regeneration assist adsorber, it is possible to efficiently generate cold heat.

  Further, according to the cold heat generation method according to claim 6, since the second regeneration of the main adsorber is performed using the regeneration assist adsorber after the first regeneration, it is necessary to perform all regeneration of the main adsorber with the regeneration assist adsorber. There is no. Therefore, the amount of adsorption required for the regeneration assist adsorber can be reduced, and regeneration of the main adsorber can be efficiently assisted with a small capacity regeneration assist adsorber.

  The cold heat generation method according to claim 7, wherein the main adsorber includes a first main adsorber and a second main adsorber, and the second main adsorber is generated during the cold heat generation in the first main adsorber. The first regeneration and the second regeneration are performed, and the assist regeneration of the regeneration assist adsorber is performed at the time of the first regeneration of the second main adsorber, and the cold heat is generated at the second main adsorber. The first regeneration and the second regeneration of the first main adsorber are performed, and the assist regeneration of the regeneration assist adsorber is performed at the time of the first regeneration of the first main adsorber.

According to the cold heat generation method according to claim 7, continuous cold heat generation can be performed by alternately performing the cold heat generation of the first main adsorber and the second main adsorber and the first regeneration and the second regeneration. it can. Further, the assist regeneration of the regeneration assist adsorber is performed at the first regeneration of the first main adsorber and at the first regeneration of the second main adsorber. Thus, by performing regeneration of the regeneration assist adsorber, one regeneration assist adsorber can be used for the second regeneration of the first main adsorber and the second main adsorber.

  Since the present invention has the above-described configuration, an adsorption heat pump and a cold heat generation method capable of efficiently generating cold heat can be obtained.

It is the schematic which shows the structure of the adsorption | suction type heat pump system of embodiment of this invention. It is a block diagram which shows the connection of the control part and valve | bulb of an adsorption | suction type heat pump system. It is a graph of the adsorption isotherm which shows an example of the adsorption | suction characteristic of an adsorbent. It is the graph which plotted adsorption amount difference (DELTA) q when the regeneration temperature of the adsorbent which has the adsorption | suction characteristic of FIG. It is a graph of the adsorption isotherm which shows an example of the adsorption | suction characteristic of an assist adsorbent. 4 is a flowchart of an operation process of the adsorption heat pump 10. It is a flowchart of a 1st cold heat generation mode start instruction. It is a flowchart of a first reproduction second mode start instruction. It is a flowchart of the start instruction | indication of assist reproduction | regeneration. It is a flowchart of a 2nd reproduction 2nd mode start instruction. It is a flowchart of the 2nd cold heat generation mode start instruction. It is a flowchart of the start instruction | indication of 1st reproduction | regeneration 1st mode. (A) is a figure explaining the piping connection relation at the time of the 1st cold heat generation mode and the 1st regeneration 2nd mode, and (B) shows the piping connection relation at the time of the 1st cold heat generation mode and the 2nd regeneration 2nd mode. It is a figure explaining. (A) is a figure explaining the piping connection relation at the time of 2nd cold heat generation mode and 1st regeneration 1st mode, (B) is the piping connection relation at the time of 2nd cold heat generation mode and 2nd regeneration 1st mode. It is a figure explaining. It is a graph which shows the relationship between regeneration temperature and adsorption amount difference (DELTA) q in the adsorption heat pump of an Example and a comparative example.

  FIG. 1 shows an adsorption heat pump 10 according to an embodiment of the present invention. The adsorption heat pump 10 includes an evaporator 12, a high-temperature evaporator 13, a first main adsorber 14, a second main adsorber 16, a regeneration assist adsorber 18, and a condenser 20.

  The adsorption heat pump 10 further includes a control unit 72 (see FIG. 2). The control unit 72 includes a CPU, a memory, a driver for switching valves, and the like. The control unit 72 operates the adsorption heat pump 10 by switching a later-described valve based on a pre-recorded program.

  The evaporator 12 has a fluid as a heat medium inside, and can evaporate the heat medium and perform an operation (cold heat generation) of absorbing energy (heat amount) from the outside by heat of vaporization at that time. In this embodiment, water is used as the heat medium.

A pipe PA is disposed in the evaporator 12, and the pipe PA is connected to the cooling / heating device 70. The inside of the pipe PA is filled with a heat exchanging fluid (in this embodiment, water), and the heat exchange fluid circulates in the pipe PA by a pump (not shown), so that the cold heat generated in the evaporator 12 is cooled by the cold equipment. 70.

  The condenser 20 condenses the sent heat medium (gas phase state) and performs an operation (heat generation) for releasing the condensation heat to the outside. A pipe PB is disposed in the condenser 20, and the pipe PB is connected to the cooling unit 71. The inside of the pipe PB is filled with a fluid for heat exchange (in this embodiment, water), and the inside of the condenser 20 is maintained at a predetermined temperature by circulating the heat exchange fluid in the pipe PB by a pump (not shown). Then, the vapor sent to the condenser 20 is condensed.

  The condenser 20 is connected to the evaporator 12 and the high temperature evaporator 13 via a pipe 29. The pipe 29 is provided with a liquid valve VL. One end of the pipe 29 is connected to the condenser 20, and the other end is branched into a pipe 29A connected to the evaporator 12 side and a pipe 29B connected to the high temperature evaporator 13 side. The liquid valve VL is provided on the condenser 20 side with respect to the branch portion of the pipe 29. Further, a pump P is provided in the pipe 29B. The liquid valve VL is connected to the control unit 72 and is appropriately opened and closed to send water from the condenser 20 to the evaporator 12 and the high-temperature evaporator 13. When water is sent to the high temperature evaporator 13, the pump P is also operated.

A heat exchange fluid (water in this embodiment) is stored in the high-temperature evaporator 13. Water in the high temperature evaporator 13 is heated by a heat source (not shown) to generate water vapor. The generated water vapor is appropriately supplied to the first main adsorber 14 and the second main adsorber 16.

  An adsorbent 14A and a heat transfer tank 14B are arranged in the first main adsorber 14, and an adsorbent 16A and a heat transfer tank 16B are arranged in the second main adsorber 16. The adsorbents 14A and 16A adsorb and desorb gas-phase water as a heat medium. For example, activated carbon, mesoporous silica, zeolite, or the like can be used. The adsorbents 14A and 16A adsorb the heat medium from the evaporator 12 in the cold heat generation mode described later, and desorb the adsorbed heat medium in the first and second regeneration modes. The heat transfer tanks 14B and 16B can exchange heat with the adsorbents 14A and 16A via partition walls, and can store water as a heat medium.

  In the regeneration assist adsorber 18, an assist adsorbent 18A and a heat transfer tank 18B are arranged. The assist adsorbent 18A adsorbs / desorbs gas-phase water as a heat medium, and for example, activated carbon, mesoporous silica, zeolite, or the like can be used. As the assist adsorbent 18A, one having an adsorption characteristic different from those of the adsorbents 14A and 16A is selected. The assist adsorbent 18A desorbs the adsorbed heat medium in the first regeneration mode described later. In the second regeneration mode, the heat medium from the adsorbents 14A and 16A is adsorbed. The heat transfer tank 18B can exchange heat with the assist adsorbent 18A via a partition wall, and can store water as a heat medium.

  The evaporator 12 has a space in which the adsorbent 14A of the first main adsorber 14 is accommodated (hereinafter, this space is referred to as “adsorbent space 14R”), and an adsorbent 16A of the second main adsorber 16 is accommodated. The space (hereinafter, this space is referred to as “adsorbent space 16 </ b> R”) is connected via a pipe 22. The pipe 22 is branched into a pipe 22A connected to the first main adsorber 14 and a pipe 22B connected to the second main adsorber 16. The pipe 22A is provided with a valve V11. Is provided with a valve V12. As shown in FIG. 2, the valves V11 and V12 are connected to the control unit 72 and are controlled to be opened and closed by the control unit 72. By opening the valves V11 and V12, the first and second valves V11 and V12 are opened. The heat medium (gas phase state) can be moved to the adsorbent space 14R of the first main adsorber 14 and the adsorbent space 16R of the second main adsorber 16.

  The high temperature evaporator 13 is connected to the heat transfer tank 14B of the first main adsorber 14 and the heat transfer tank 16B of the second main adsorber 16 by a pipe T1. The pipe T1 is branched into a pipe T1A connected to the heat transfer tank 14B and a pipe T1B connected to the second main adsorber 16, and the pipe T1A is provided with a valve V2, and the pipe T1B has a valve. V1 is provided. The valves V1 and V2 are connected to the control unit 72 (see FIG. 2), and opening / closing is controlled by the control unit 72. By opening the valves V1 and V2, the heat medium (gas phase state) moves from the high-temperature evaporator 13 to the heat transfer tank 14B of the first main adsorber 14 and the heat transfer tank 16B of the second main adsorber 16. It becomes possible.

  The adsorbent space 14 </ b> R of the first main adsorber 14 and the adsorbent space 16 </ b> R of the second main adsorber 16 are spaces in which the adsorbent 18 </ b> A of the regeneration assist adsorber 18 is accommodated via a pipe 24 (hereinafter, referred to as “adsorbent adsorbent 18 </ b> A”). This space is connected to the “adsorbent space 18R”). One end of the pipe 24 is connected to the adsorbent space 18R, and is branched into a pipe 24A connected to the adsorbent space 14R at an intermediate portion and a pipe 24B connected to the adsorbent space 16R. A valve V3 is provided in the pipe 24A, a valve V4 is provided in the pipe 24B, and a valve V5 is provided in the pipe 24 where the pipes 24A and 24B merge. The valves V <b> 3 to 5 are connected to the control unit 72, and opening / closing is controlled by the control unit 72.

  The heat transfer tank 14B of the first main adsorber 14 and the heat transfer tank 16B of the second main adsorber 16 are connected to the heat transfer tank 18B of the regeneration assist adsorber 18 via a pipe T2. One end of the pipe T2 is connected to the heat transfer tank 18B, and is branched into a pipe T2A connected to the heat transfer tank 14B at an intermediate portion and a pipe T2B connected to the heat transfer tank 16B. The pipe T2A is provided with a valve V6, and the pipe T2B is provided with a valve V7. The valves V <b> 6 and V <b> 7 are connected to the control unit 72 and opening / closing is controlled by the control unit 72.

  One end of the pipe 26 is connected between the valves V3 and V4 of the pipe 24 and the valve V5. The other end of the pipe 26 is connected to the condenser 20. The pipe 26 is provided with a valve V8. The valve V <b> 8 is connected to the control unit 72 and opening / closing is controlled by the control unit 72.

  The adsorbent space 18R of the regeneration assist adsorber 18 is connected to the condenser 20 via a pipe 28. The pipe 28 is provided with a valve V10. The valve V <b> 10 is connected to the control unit 72 and opening / closing is controlled by the control unit 72.

  The heat transfer tank 18B of the regeneration assist adsorber 18 is connected to the condenser 20 via a pipe T3. A valve V9 is provided in the pipe T3. The valve V9 is connected to the control unit 72 (see FIG. 2), and opening and closing is controlled by the control unit 72.

  In the present embodiment, as described above, the first main adsorber 14 and the second main adsorber 16 are arranged in parallel between the evaporator 12 and the regeneration assist adsorber 18. Therefore, the second main adsorber 16 is regenerated when the first main adsorber 14 is used for cold heat generation, and the first main adsorber 14 is used when the second main adsorber 16 is used for cold heat generation. By regenerating, continuous cold heat generation can be performed.

  In the present embodiment, the temperature of the heat exchange fluid cooled by the cooling unit 71 is normal temperature Tm. Further, the temperature of water vapor generated and sent out by the high-temperature evaporator 13 is assumed to be about 60 ° C. to 90 ° C., and this temperature becomes the main regeneration temperature Th when the adsorbents 14A and 16A are regenerated. In this embodiment, the normal temperature Tm is about 35 ° C., the cooling temperature Tl is about 20 ° C., and the main regeneration temperature Th is about 80 ° C.

Here, adsorption and desorption of the heat medium by the adsorbent 14A in the first main adsorber 14 and the adsorbent 16A in the second main adsorber 16 will be described.

FIG. 3 shows a graph (adsorption isotherm) showing an example of a relationship (adsorption characteristic) between the relative pressure φ (the ratio between the adsorbent pressure and the saturated vapor pressure) and the adsorbent adsorption amount q. Since the amount of adsorption by the adsorbent varies depending on the relative pressure φ, the heat medium can be adsorbed by the adsorbent and desorbed from the adsorbent by changing the relative pressure φ. The larger the difference Δq in the amount of adsorption by the adsorbent corresponding to the change in the relative pressure φ, the more efficiently cold heat can be generated.

Since the above relative pressure φ depends on the temperature, the adsorption amount difference Δq becomes small when the temperature at which the heat medium is desorbed (regeneration temperature Th) is low. FIG. 4 shows a graph in which the adsorption amount difference Δq is plotted when the regeneration temperature of the adsorbent having the adsorption characteristics shown in FIG. 3 is decreased by 5 ° C. from 80 ° C. As shown in FIG. 4, when the regeneration temperature is lowered, the adsorption amount difference Δq is reduced, and it is difficult to efficiently generate cold. On the other hand, it is required for efficient cold heat generation to use a factory and various other exhaust heat for regeneration of the adsorbent.

During the cold heat generation mode, the first main adsorption provided with the adsorbent 14A having the above characteristics (or “adsorbent 16A”, hereinafter, the one corresponding to the second main adsorber 16 is also shown in parentheses). The adsorbent space 14 </ b> R of the container 14 (adsorbent space 16 </ b> R of the second main adsorber 16) communicates with the evaporator 12 and adsorbs the heat medium evaporated from the evaporator 12. At this time, cold heat is generated in the evaporator 12. If the temperature in the first main adsorber 14 (second main adsorber 16) is normal temperature Tm and the cold temperature in the evaporator 12 is cold temperature Tl lower than normal temperature Tm, the first main adsorber 14 (second The relative pressure φ2 of the main adsorber 16) is expressed by equation 1.

φ2 = saturated vapor pressure at temperature Tl / saturated vapor pressure at temperature Tm (Equation 1)

When the adsorbent having the adsorption characteristics shown in FIG. 3 is used as the adsorbents 14A and 16A, if the relative temperature φ2 = 0.4 at the cold temperature Tl = 20 ° C. and the normal temperature Tm = 35 ° C., the per adsorbent The heat medium adsorption amount q0a (per unit mass) is about 0.3.

Moreover, in this embodiment, in order to send the vapor | steam by the adsorption | suction heat of the 1st main adsorption device 14 (2nd main adsorption device 16) to the regeneration assistance adsorption device 18 during the cold generation mode, the heat transfer tank 14B (heat transfer tank) 16B) and the heat transfer tank 18B of the regeneration assist adsorber 18 are connected. If the temperature of the heat transfer tank 18B at this time is the assist regeneration temperature Ta and the equilibrium temperature at the time of adsorption of the adsorbent 14A (adsorbent 16A) is Tb, the first main adsorber 14 (second main adsorber 16) The relative pressure φ4 of the adsorbent 14A (adsorbent 16A) is expressed by Equation 2.

φ4 = saturated vapor pressure at temperature Ta / saturated vapor pressure at equilibrium temperature Tb (Equation 2)

When the adsorbent having the adsorption characteristics shown in FIG. 3 is used as the adsorbents 14A and 16A, if the regeneration assist temperature Ta = 45 ° C., the equilibrium temperature Tb = 70 ° C., and the relative pressure φ4 = 0.3, the adsorption The heat medium adsorption amount per material q0b = about 0.2.

The operation of desorbing the heat medium adsorbed by the adsorbents 14A and 16A is referred to as regeneration, and in this embodiment, regeneration is performed in two stages of first regeneration and second regeneration. In the first regeneration, the adsorbent 14 </ b> A of the first main adsorber 14 (adsorbent 16 </ b> A of the second main adsorber 16) communicates with the condenser 20. Further, the heat transfer tank 14B of the first main adsorber 14 (the heat transfer tank 16B of the second main adsorber 16) communicates with the high temperature evaporator 13. At this time, assuming that the temperature in the first main adsorber 14 (second main adsorber 16) is the regeneration temperature Th and the temperature in the condenser 20 is normal temperature Tm, the first main adsorber 14 (second main adsorber). The relative pressure φ1 of 16) is expressed by Equation 3.

φ1 = saturated vapor pressure at temperature Tm / saturated vapor pressure at temperature Th (Equation 3)

When the adsorbent having the adsorption characteristics shown in FIG. 3 is used as the adsorbents 14A and 16A, if the regeneration temperature Th = 80 ° C., the normal temperature Tm = 35 ° C. and the relative pressure φ1 = 0.1, the adsorbent per adsorbent The heat medium adsorption amount q1 = 0.08. The heat medium having the difference Δq1a = 0.22 between q0a and q1 is desorbed from the adsorbents 14A and 16A that have adsorbed at the relative pressure φ2.

In the second regeneration, the adsorbent 14A of the first main adsorber 14 (adsorbent 16A of the second main adsorber 16) communicates with the assist adsorbent 18A of the regeneration assist adsorber 18. At this time, the temperature in the first main adsorber 14 (second main adsorber 16) is the regeneration temperature Th, and the temperature in the regeneration assist adsorber 18 is normal temperature Tm. The relative pressure φ5 of the first main adsorber 14 (second main adsorber 16) at this time is expressed by Equation 4.

φ5 = Regenerative assist adsorber equilibrium pressure at temperature Tm / saturated vapor pressure at temperature Th (Equation 4)

Here, the temperature in the regeneration assist adsorber 18 is normal temperature Tm, and the saturated vapor pressure is the same as the saturated vapor pressure in the condenser 20. Under the same normal temperature Tm, the assist adsorbent 18A causes the equilibrium pressure in the regeneration assist adsorber 18 to be lower than the saturated vapor pressure at the normal temperature Tm. Therefore, the relative pressure φ5 is smaller than the relative pressure φ1. When the adsorbent having the adsorbing characteristics shown in FIG. 3 is used as the adsorbents 14A and 16A, when the relative pressure φ5 = 0.05, the heat medium adsorption amount per adsorbent q2 = about 0.05, and the adsorbent From 14A and 16A, the heating medium having a difference Δq2 between q1 and q2 of about 0.03 is further desorbed.

As described above, efficient heat generation can be performed by adsorbing a large amount of heat medium during cold heat generation and detaching as much of the adsorbed heat medium as possible during regeneration. That is, as the difference Δq0 = Δq1a + Δq2 between the amount of adsorption q0 by the adsorbent during cold heat generation and the amount of adsorption q2 of the adsorbent during regeneration increases, cold heat generation can be performed more efficiently.

Next, heat medium adsorption and desorption (assist regeneration) by the assist adsorbent 18A in the regeneration assist adsorber 18 will be described.

The assist regeneration for detaching the heat medium from the assist adsorbent 18A is performed during the first regeneration of the first main adsorber 14 (second main adsorber 16). At this time, the regeneration assist adsorber is generated by the heat of condensation when the vapor of the heat medium supplied from the heat transfer tank 14B (heat transfer tank 16B) to the heat transfer tank 18B in the regeneration assist adsorber 18 is condensed into a liquid phase. The inside of the regeneration assist adsorber 18 reaches the assist regeneration temperature Ta. The regeneration assist adsorber 18 (assist adsorbent 18A) is in communication with the condenser 20. The relative pressure φ3 of the regeneration assist adsorber 18 at this time is expressed by Expression 5.

φ3 = saturated vapor pressure at temperature Tm / saturated vapor pressure at temperature Ta (Formula 5)

FIG. 5 shows a graph (adsorption isotherm) showing an example of the relationship (adsorption characteristic) between the relative pressure and the adsorption amount of the assist adsorbent 18A. When the assist adsorbent 18A having the adsorption characteristics is used, if the relative temperature φ3 = 0.58 at the normal temperature Tm = 35 ° C., the assist regeneration temperature Ta = 45 ° C., the heat medium adsorption amount q5 = 0 per adsorbent. .04 or so.

On the other hand, the assist adsorbent 18A adsorbs the heat medium desorbed from the first main adsorber 14 and the second main adsorber 16 during the second regeneration of the first main adsorber 14 and the second main adsorber 16 ( Assist adsorption). At the time of the second regeneration, the heat transfer tank 18B is connected to the condenser 20, and the temperature in the regeneration assist adsorber 18 becomes normal temperature Tm.

At this time, in the regeneration assist adsorber 18, the heat medium is adsorbed, and when the adsorbent having the adsorption characteristics shown in FIG. 5 is used as the assist adsorbent 18A, the adsorption is performed until the adsorption amount becomes about 0.35. move on.

In the above example, the adsorption difference Δq5 = 0.31 at the assist adsorbent 18A. Since the assist adsorbent 18A can be used more efficiently as the adsorption amount difference Δq5 is larger, the assist adsorbent 18A has a larger adsorption amount difference at a relative pressure higher by about 0.1 to 0.2 from the relative pressure φ3. It is preferable to select one having a large rising slope.

  Next, the operation process of the adsorption heat pump 10 of this embodiment will be described. In the operation process of the adsorption heat pump 10, when one of the first main adsorber 14 and the second main adsorber 16 is in the cold heat generation mode, the other is in the first regeneration mode and the second regeneration mode. The first regeneration mode and the second regeneration mode are alternately repeated to generate continuous cold heat. Hereinafter, the cold generation mode of the first main adsorber 14 is referred to as a cold generation first mode, and the cold generation mode of the second main adsorber 16 is referred to as a cold generation second mode. Further, the first regeneration mode and the second regeneration mode of the first main adsorber 14 are referred to as a first regeneration first mode and a second regeneration first mode, and the first regeneration mode and the second regeneration of the second main adsorber 16 are referred to. The modes are referred to as a first reproduction second mode and a second reproduction second mode.

  The adsorption heat pump operation process is executed by the controller 72. When a process start instruction is input from the user to the controller 72, the adsorption heat pump operation process shown in FIG. 6 is executed.

  First, in step S10, the start of the first cold heat generation mode is instructed. As shown in FIG. 7, the first cold heat generation mode is started by an instruction to close the valves V2, V3, V12 in step S12 and to open the valves V6, V11 in step S14. Thereby, the evaporator 12 and the adsorbent space 14R of the first main adsorber 14 are connected. In the evaporator 12, the heat medium evaporates, and the evaporated heat medium moves to the first main adsorber 14 via the pipes 22 and 22A and is adsorbed by the adsorbent 14A. At this time, the temperature in the evaporator 12 is the cold temperature Tl. The heat transfer tank 14B of the first main adsorber 14 is connected to the heat transfer tank 18B of the regeneration assist adsorber 18, and is heated by the adsorption heat of the adsorbent 14A, so that the vapor in the heat transfer tank 14B is regenerated. It is sent to 18 heat transfer tanks 18B. The temperature in the first main adsorber 14 is the assist regeneration temperature Ta. The adsorbent 14A adsorbs the heat medium with a relative pressure φ4 (see FIG. 13A).

  Next, in step S20, the start of the first reproduction second mode is instructed. As shown in FIG. 8, the first regeneration second mode is started by an instruction to close the valves V5, V7 in step S22 and open the valves V1, V4, V8 in step S24. As a result, the high temperature evaporator 13 and the heat transfer tank 16B of the second main adsorber 16 are connected, the vapor from the high temperature evaporator 13 is condensed, and the temperature in the second main adsorber 16 becomes the main regeneration temperature Th. . Further, the adsorbent space 16R of the second main adsorber 16 is connected to the condenser 20, and the adsorbent 16A is regenerated with a relative pressure φ1.

  Next, in step S30, the start of assist playback is instructed. As shown in FIG. 9, the assist regeneration is started by an instruction to close the valve V9 in step S32 and open the valve V10 in step S34. Steam is sent from the heat transfer tank 14B of the first main adsorber 14 to the heat transfer tank 18B of the regeneration assist adsorber 18, and the vapor condenses. The temperature in the regeneration assist adsorber 18 is equal to the assist regeneration temperature Ta. Become. Further, the assist adsorbent 18A of the regeneration assist adsorber 18 is communicated with the condenser 20 (normal temperature Tm), and the assist adsorbent 18A is regenerated with the relative pressure φ3.

  Next, it is determined whether or not a predetermined time T1 has elapsed in step S38 (see FIG. 6). Here, the predetermined time T1 is the time taken to regenerate the adsorbent 16A of the second main adsorber 16 and the assist adsorbent 18A of the regeneration assist adsorber 18, and the adsorbent 16A and the assist adsorbent 18A at the respective relative pressures. It is preferable to secure a time for sufficiently reproducing the image. When the predetermined time T1 has elapsed, the process proceeds to step S40.

  In step S40, the start of the second reproduction second mode is instructed. As shown in FIG. 10, the second regeneration second mode is started by an instruction to close the valves V8 and V10 in step S42 and open the valves V5 and V9 in step S44. As a result, the adsorbent space 16R of the second main adsorber 16 communicates with the adsorbent space 18R of the regeneration assist adsorber 18. The regeneration temperature Th is maintained in the second main adsorber 16. On the other hand, the temperature in the regeneration assist adsorber 18 is cooled by evaporating and cooling the liquid phase heat medium stored in the heat transfer tank 18 </ b> B. The material 16A is regenerated with a relative pressure φ5. At this time, the assist adsorbent 18A of the regeneration assist adsorber 18 adsorbs the heat medium from the second main adsorber 16 (see FIG. 13B).

  Next, in step S48 (see FIG. 6), it is determined whether or not a predetermined time T2 has elapsed. Here, the predetermined time T2 preferably secures a time during which the adsorbent 16A of the second main adsorber 16 can be sufficiently regenerated with the relative pressure φ5. When the predetermined time T2 has elapsed, the process proceeds to step S50.

  In step S50, the start of the second cold heat generation mode is instructed. As shown in FIG. 11, the second cold heat generation mode is started by an instruction to close the valves V1, V4, V11 in step S52 and open the valves V7, V12 in step S54. Thereby, the evaporator 12 and the adsorbent space 16R of the second main adsorber 16 are connected. In the evaporator 12, the heat medium evaporates, and the evaporated heat medium moves to the second main adsorber 16 via the pipes 22 and 22B and is adsorbed by the adsorbent 16A. At this time, the temperature in the evaporator 12 is the cold temperature Tl. The heat transfer tank 16B of the second main adsorber 16 is connected to the heat transfer tank 18B of the regeneration assist adsorber 18, and is heated by the adsorption heat of the adsorbent 16A so that the steam in the heat transfer tank 16B is regenerated. It is sent to 18 heat transfer tanks 18B. The temperature in the second main adsorber 16 is the assist regeneration temperature Ta. The adsorbent 16A adsorbs the heat medium with a relative pressure φ4 (see FIG. 14A).

  Next, in step S60, the start of the first reproduction first mode is instructed. As shown in FIG. 12, the first regeneration first mode is started by an instruction to close the valves V5 and V6 in step S62 and to open the valves V3 and V8 in step S64. Thus, the temperature in the first main adsorber 14 becomes the main regeneration temperature Th, communicates with the condenser 20 (normal temperature Tm), and the adsorbent 14A is regenerated with the relative pressure φ1.

  Next, in step S70, the start of assist playback is instructed. The start of assist playback is defined in steps S32 and S34 shown in FIG. Steam is sent from the heat transfer tank 16B of the second main adsorber 16 to the heat transfer tank 18B of the regeneration assist adsorber 18, and the vapor condenses. The temperature in the regeneration assist adsorber 18 is equal to the assist regeneration temperature Ta. Become. Further, the assist adsorbent 18A of the regeneration assist adsorber 18 is communicated with the condenser 20 (normal temperature Tm), and the assist adsorbent 18A is regenerated with the relative pressure φ3.

  Next, it is determined whether or not a predetermined time T3 has elapsed in step S78 (see FIG. 6). Here, the predetermined time T3 is the time taken to regenerate the adsorbent 14A of the first main adsorber 14 and the assist adsorbent 18A of the regeneration assist adsorber 18, and the adsorbent 14A and the assist adsorbent 18A at the respective relative pressures. It is preferable to secure a time for sufficiently reproducing the image. When the predetermined time T3 has elapsed, the process proceeds to step S80.

  In step S80, the start of the second reproduction first mode is instructed. The start of the second playback first mode is defined in steps S42 and S44 shown in FIG. Thus, the adsorbent space 14R of the first main adsorber 14 is communicated with the adsorbent space 18R of the regeneration assist adsorber 18. The regeneration temperature Th is maintained in the first main adsorber 14. On the other hand, the temperature in the regeneration assist adsorber 18 is cooled by evaporating the liquid phase heat medium stored in the heat transfer tank 18B, and becomes the same normal temperature Tm as in the condenser 20, and the adsorption of the first main adsorber 14 is performed. The material 14A is regenerated with a relative pressure φ5. At this time, the assist adsorbent 18A of the regeneration assist adsorber 18 adsorbs the heat medium from the first main adsorber 14 (see FIG. 14B).

  Next, in step S88 (see FIG. 6), it is determined whether or not a predetermined time T4 has elapsed. Here, it is preferable that the predetermined time T2 secure a time for sufficiently regenerating the adsorbent 14A of the first main adsorber 14 with the relative pressure φ5. When the predetermined time T4 has elapsed, the process returns to step S10 and the following processing is repeated.

  As described above, by performing the adsorption heat pump operation, it is possible to continuously generate cold.

  In the adsorption heat pump 10 of the present embodiment, the first main adsorber 14 and the second main adsorber 16 are communicated with the regeneration assist adsorber to perform the second regeneration. Therefore, the relative pressure φ3 is set to the relative pressure during the first regeneration. It can be made smaller than φ4. Therefore, more heat medium can be desorbed from the adsorbents 14A and 16A, and cold heat can be generated efficiently.

  In the adsorption heat pump 10 of the present embodiment, the second regeneration of the first main adsorber 14 and the second main adsorber 16 is performed after the first regeneration. Therefore, it is not necessary to perform all regeneration of the first main adsorber 14 and the second main adsorber 16 by the regeneration assist adsorber 18. As a result, the amount of adsorption required for the regeneration assist adsorber 18 can be reduced, and the regeneration assist adsorber 18 has a small capacity and assists the regeneration of the first main adsorber 14 and the second main adsorber 16. be able to.

  Further, in the adsorption heat pump 10 of this embodiment, the heat of adsorption of the first main adsorber 14 and the second main adsorber 16 is used as a heat source when regenerating the adsorbent 18A of the regeneration assist adsorber 18, so that the heat source The heat source for assist regeneration can be reduced.

Further, in the adsorption heat pump 10 of the present embodiment, regeneration (assist regeneration) of the regeneration assist adsorber 18 is performed during the first regeneration of the first main adsorber 14 and the second main adsorber 16. Therefore, after one main adsorber (one of the first main adsorber 14 and the second main adsorber 16) is regenerated for the first time, the main adsorber (the first main adsorber 14, the second main adsorber 14) is continuously generated. The second regeneration of one of the devices 16 can be performed, and the regeneration assist adsorption device 18 can be efficiently regenerated without time loss. Also, the two main adsorbers (the first main adsorber 14 and the second main adsorber 16) can be second regenerated by the single regeneration assist adsorber 18.

  Moreover, in the adsorption heat pump 10 of this embodiment, two main adsorption devices (the 1st main adsorption device 14 and the 2nd main adsorption device 16) are used, and the cold heat treatment of one side and the reproduction | regeneration by the other are performed alternately. Thus, continuous cold heat generation can be performed.

  In the adsorption heat pump 10 of the present embodiment, the first main adsorber 14, the second main adsorber 16, and the regeneration assist adsorber 18 are connected to the condenser 20, the condenser 20 is the evaporator 12, and the high-temperature evaporation is performed. Since it is connected to the evaporator 13, the vapor from each can be condensed by the condenser 20 and sent to the evaporator 12 and the high-temperature evaporator 13.

  The adsorption heat pump 10 of the present embodiment includes two main adsorbers, the first main adsorber 14 and the second main adsorber 16, but one main adsorber when not continuously operated. (For example, you may provide only the 1st main adsorption device 14). In this case, cold heat generation, first regeneration, and second regeneration are repeated with one main adsorber. In this case, the assist adsorbent 18A of the regeneration assist adsorber 18 is regenerated by the heat of adsorption from the first main adsorber 14 in the cold heat generation mode. Even in this case, since the second main regeneration is performed by communicating the first main adsorber 14 with the regeneration assist adsorber, the relative pressure φ5 can be made smaller than the relative pressure φ1 during the first regeneration, and the adsorbent 14A ( More heat medium can be desorbed from 16A), and cold heat can be generated efficiently. The second regeneration of the first main adsorber 14 (or the second main adsorber 16) is performed after the first regeneration. Therefore, it is not necessary to perform all regeneration of the first main adsorber 14 (or the second main adsorber 16) by the regeneration assist adsorber 18, and the regeneration assist adsorber 18 having a relatively small capacity can be used efficiently. Can do.

  Furthermore, since the heat of adsorption of the first main adsorber 14 (second main adsorber 16) is used as a heat source for regeneration of the regeneration assist adsorber 18, heat can be efficiently utilized. Further, a heat source for assist regeneration is not required separately, and the heat source can be reduced.

  In the above embodiment, for example, water or ammonia can be used as the heat medium. Further, as the adsorbents 14A and 16A, it is only necessary that the heat medium can be adsorbed and desorbed. For example, silica gel can be used. As the assist adsorbent 18A, silica gel can be used, but zeolite, activated carbon, and other substances can also be used.

  FIG. 15 shows the main regeneration temperature Th when the cold generation is performed by the adsorption heat pump as a comparative example having no regeneration assist adsorber 18 and when the cold generation is performed by the adsorption heat pump 10 of the present embodiment. The graph which shows adsorption amount difference (DELTA) q for every is shown. In any of the adsorption heat pumps, the adsorbents 14A and 16A are those having the adsorption characteristics shown in FIG. 3, and the assist adsorbent 18A is 0.1 higher than the relative pressure φ3 as shown in FIG. The thing with the adsorption | suction characteristic with a big adsorption amount difference by relative pressure was used. The difference in adsorption amount Δq between the main regeneration temperatures Th55 ° C. and 80 ° C. by 5 ° C. is the difference between the adsorption amount difference Δq between the adsorption heat pump 10 of this embodiment and the adsorption heat pump of the comparative example as the temperature decreases. Is open. According to the adsorption heat pump 10 of the present embodiment, a large adsorption amount difference Δq can be obtained even when the main regeneration temperature Th is as low as 55 ° C.

DESCRIPTION OF SYMBOLS 10 Adsorption type heat pump 12 Evaporator 13 High temperature evaporator 14 Main adsorber 16 Main adsorber 18 Regeneration assist adsorber 20 Condenser

Claims (7)

An evaporator for evaporating the heating medium;
It is communicated with the evaporator in the cold heat generation mode and generates heat of adsorption while adsorbing the heat medium from the evaporator, and is degenerated at the main regeneration temperature for the first regeneration in the first regeneration mode. A main adsorber,
The main adsorber is second regenerated by adsorbing a heat medium from the main adsorber after the first regeneration in the second regeneration mode, and communicated with the main adsorber in the cold heat generation mode of the main adsorber, A regeneration assist adsorber that is heated by the adsorption heat of the main adsorber and is assist regenerated;
Adsorption heat pump with   2. The adsorption heat pump according to claim 1, wherein the main adsorber includes a first main adsorber and a second main adsorber connected to the evaporator and the regeneration assist adsorber, respectively.   The first regeneration and the second regeneration of the second main adsorber are performed during the adsorption of the heat medium by the first main adsorber, and the regeneration assist adsorber is performed during the first regeneration of the second main adsorber. Is heated by the adsorption heat from the second main adsorber and the assist regeneration is performed, and when the heat medium is adsorbed by the second main adsorber, the first regeneration of the first main adsorber, the second The adsorption heat pump according to claim 2, wherein regeneration is performed and the assist regeneration of the regeneration assist adsorber is performed at the time of the first regeneration of the first main adsorber. A high-temperature evaporator that is connected to the main adsorber, evaporates a heat exchange heat medium and supplies it to the main adsorber, and raises the main adsorber to the main regeneration temperature by heat exchange;
A heat transfer tank that receives the heat exchange heat medium from the main adsorber during the cold heat generation mode of the main adsorber and heats the regeneration assist adsorber;
The adsorption heat pump according to any one of claims 1 to 3, further comprising:   The adsorption heat pump according to any one of claims 1 to 4, wherein the main adsorber and the regeneration assist adsorber are connected to a condenser that condenses a heat medium. Evaporating the heat medium in the evaporator to generate cold heat, generating heat of adsorption while adsorbing the heat medium in the main adsorber, heating the regeneration assist adsorber with the heat of adsorption, and assist regeneration
The main adsorber is first regenerated by desorbing the adsorbed heat medium from the main adsorber at a main regeneration temperature,
A heat medium from the main adsorber is adsorbed by the regeneration assist adsorber after the first regeneration, and the main adsorber is second regenerated;
Cold heat generation method. The main adsorber has a first main adsorber and a second main adsorber,
The regeneration assist adsorber performs the first regeneration and the second regeneration of the second main adsorber during the cold heat generation in the first main adsorber, and the first regeneration of the second main adsorber. Assist playback of
Performing the first regeneration and the second regeneration of the first main adsorber during the cold heat generation in the second main adsorber, and the regeneration assist adsorber during the first regeneration of the first main adsorber Performing the assist playback of
The cold heat generation method according to claim 6.

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