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WO2024106180A1 - Appareil de commande, système d'utilisation de chaleur géothermique, procédé de commande et programme associé - Google Patents

Appareil de commande, système d'utilisation de chaleur géothermique, procédé de commande et programme associé Download PDF

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Publication number
WO2024106180A1
WO2024106180A1 PCT/JP2023/038921 JP2023038921W WO2024106180A1 WO 2024106180 A1 WO2024106180 A1 WO 2024106180A1 JP 2023038921 W JP2023038921 W JP 2023038921W WO 2024106180 A1 WO2024106180 A1 WO 2024106180A1
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WO
WIPO (PCT)
Prior art keywords
heat
water well
mode
hot water
utilization system
Prior art date
Application number
PCT/JP2023/038921
Other languages
English (en)
Japanese (ja)
Inventor
林日 崔
正頌 坂井
伸治 三原
悠 竹中
隼佑 磯野
Original Assignee
三菱重工サーマルシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Publication of WO2024106180A1 publication Critical patent/WO2024106180A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T50/00—Geothermal systems 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F23/00—Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Definitions

  • the present disclosure relates to a control device, a geothermal heat utilization system, a control method, and a program.
  • Patent Document 1 discloses a geothermal energy utilization system that stores heat emitted from a building underground.
  • the geothermal energy utilization system disclosed in Patent Document 1 uses hot heat stored in a heat storage tank as a heat source for heating and hot water supply to a building, and uses cold heat stored in a separate heat storage tank as a heat source for cooling the building.
  • a heat storage tank as a heat source for heating and hot water supply to a building
  • cold heat stored in a separate heat storage tank as a heat source for cooling the building.
  • the stored heat may be insufficient in winter.
  • the purpose of this disclosure is to provide a control device, a geothermal energy utilization system, a control method, and a program that are less likely to cause a shortage of stored heat.
  • the control device includes a first mode control unit that controls a geothermal heat utilization system including a heat source well facility including a hot water well and a cold water well, and a heat storage auxiliary facility including an exhaust heat recovery mechanism, a cooling tower, or an air-cooled heat pump, in a first mode in which cold heat stored in the cold water well is supplied to equipment and hot heat obtained from the equipment is stored in the hot water well, and a second mode control unit that controls the geothermal heat utilization system in a second mode, instead of the first mode, in which cold heat stored in the cold water well is supplied to the heat storage auxiliary facility and hot heat obtained from the heat storage auxiliary facility is stored in the hot water well.
  • a geothermal heat utilization system including a heat source well facility including a hot water well and a cold water well, and a heat storage auxiliary facility including an exhaust heat recovery mechanism, a cooling tower, or an air-cooled heat pump, in a first mode in which cold heat stored in the cold water well is supplied to equipment and hot heat obtained from the equipment is stored
  • the geothermal energy utilization system disclosed herein comprises the control device, the heat source well equipment, and the heat storage auxiliary equipment.
  • the control method disclosed herein controls a geothermal energy utilization system including a heat source well facility including a hot water well and a cold water well, and a heat storage auxiliary facility including an exhaust heat recovery mechanism, a cooling tower, or an air-cooled heat pump, in a first mode in which cold heat stored in the cold water well is supplied to equipment and hot heat obtained from the equipment is stored in the hot water well, and instead of the first mode, controls the geothermal energy utilization system in a second mode in which cold heat stored in the cold water well is supplied to the heat storage auxiliary facility and hot heat obtained from the heat storage auxiliary facility is stored in the hot water well.
  • the program disclosed herein causes a computer to control a geothermal energy utilization system including a heat source well facility including a hot water well and a cold water well, and a heat storage auxiliary facility including an exhaust heat recovery mechanism, a cooling tower, or an air-cooled heat pump, in a first mode in which cold energy stored in the cold water well is supplied to equipment and hot energy obtained from the equipment is stored in the hot water well, and instead of the first mode, to control the geothermal energy utilization system in a second mode in which cold energy stored in the cold water well is supplied to the heat storage auxiliary facility and hot energy obtained from the heat storage auxiliary facility is stored in the hot water well.
  • control device geothermal heat utilization system, control method, and program disclosed herein make it difficult for the stored heat to become insufficient.
  • FIG. 1 is a schematic diagram of a geothermal energy utilization system according to an embodiment of the present disclosure.
  • 1 is a system diagram of a geothermal energy utilization system according to an embodiment of the present disclosure.
  • FIG. 2 is a block diagram of a control device according to an embodiment of the present disclosure. 4 is a flowchart of a control method according to an embodiment of the present disclosure.
  • FIG. 2 is a diagram illustrating a first mode of operation of the geothermal energy utilization system according to an embodiment of the present disclosure.
  • FIG. 11 is a diagram showing the operation of a second mode (exhaust heat utilization mode) of the geothermal heat utilization system according to an embodiment of the present disclosure.
  • FIG. 11 is a diagram showing the operation of a second mode (cooling tower utilization mode) of the geothermal energy utilization system according to an embodiment of the present disclosure.
  • FIG. 13 is a diagram illustrating a third mode of operation of the geothermal energy utilization system according to an embodiment of the present disclosure.
  • FIG. 11 is a diagram showing the operation of a modified example of the second mode (cooling tower utilization mode) of the geothermal heat utilization system according to the embodiment of the present disclosure.
  • the geothermal heat utilization system 1 includes a heat source well facility 10 , a heat storage auxiliary facility 20 , a heat pump 30 , a heat exchanger 40 , and a control device 50 .
  • equipment AA e.g., air conditioning load
  • the geothermal energy utilization system 1 uses the hot heat stored as hot water in the heat source well equipment 10 for heating, and at the same time stores the exhaust cold heat from equipment AA in the heat source well equipment 10 as cold water.
  • equipment AA e.g., air conditioning load
  • the geothermal energy utilization system 1 uses the hot heat stored as hot water in the heat source well equipment 10 for heating, and at the same time stores the exhaust cold heat from equipment AA in the heat source well equipment 10 as cold water.
  • cooling is used in equipment AA
  • the geothermal energy utilization system 1 uses the cold energy stored as cold water in the heat source well equipment 10 for cooling, and at the same time stores the exhaust heat from equipment AA in the heat source well equipment 10 as hot water.
  • the heat source well facility 10 comprises a hot water well 11, a cold water well 12, and piping 13.
  • the hot water well 11 and the cold water well 12 each extend from the ground into the aquifer LY.
  • the hot water well 11 and the cold water well 12 each include a casing having a screen, and are configured to take in groundwater from the aquifer LY and return groundwater from the inside of the hot water well 11 and the cold water well 12 to the aquifer LY.
  • hot water is stored in the aquifer LY around the hot water well 11
  • cold water is stored in the aquifer LY around the cold water well 12.
  • the hot water well 11 and the cold water well 12 are provided at a distance sufficiently far from each other so that the stored hot water and cold water do not mix.
  • the heat source well equipment 10 pumps groundwater from one of the hot water well 11 and the cold water well 12 to the surface, performs heat exchange on the surface for heat utilization and supplemental heat storage, and injects the water into the other of the hot water well 11 and the cold water well 12.
  • the heat source well equipment 10 has two operating modes: one in which groundwater is pumped from the hot water well 11 and injected into the cold water well 12, and one in which groundwater is pumped from the cold water well 12 and injected into the hot water well 11.
  • Piping 13 connects the hot water well 11 and the cold water well 12 . As shown in FIG. 1 , a first end 131 of the pipe 13 extends into the hot water well 11 and is immersed in the groundwater inside the hot water well 11 . The other end 132 of the pipe 13 extends into the cold water well 12 and is immersed in the groundwater inside the cold water well 12 .
  • Each of the first end 131 and the second end 132 is provided with a pump PP, a water injection valve VA, a check valve VB, etc., and is configured to pump water from each well into the piping 13 and inject water from the piping 13 into each well.
  • the pump PP can change its output by inverter control in response to a command from the control device 50 .
  • the heat source well equipment 10 further includes a flow straightening section 14, a water injection thermometer 15, and an adjustment valve 16.
  • the straightening section 14 is provided between the hot water well 11 and the cold water well 12 and the heat exchanger 40 .
  • the rectifying unit 14 is a connection circuit including check valves CV1 to CV4, and is connected to the pipe 13 midway along the pipe 13.
  • the rectifying unit 14 rectifies the flow of water so that the water in the pipe 13 flows toward the heat exchanger 40. Therefore, regardless of whether the water is pumped from the hot water well 11 or the cold water well 12, the water in the pipe 13 flows toward the heat exchanger 40.
  • each of the check valves CV1 to CV4 shown in Figure 2 allows water to flow in the direction of the arrow and does not allow water to flow in the opposite direction to the arrow.
  • the water injection thermometer 15 is provided midway along the piping 13 leading from the heat exchanger 40 to the flow straightening section 14 , in the piping 13 through which water flows from the heat exchanger 40 to the flow straightening section 14 .
  • the water supply thermometer 15 measures the temperature of the water flowing from the heat exchanger 40 to the flow straightening section 14 and outputs the measurement result to the control device 50.
  • the regulating valve 16 is provided midway in the piping 13 leading from the flow straightening unit 14 to the heat exchanger 40 , in the piping 13 through which water flows from the flow straightening unit 14 to the heat exchanger 40 .
  • the regulating valve 16 adjusts the flow rate of water flowing from the flow straightening section 14 to the heat exchanger 40 in response to commands from the control device 50, thereby controlling the amount of water injected into each of the hot water well 11 and the cold water well 12.
  • the heat exchanger 40 exchanges heat between the water in the pipe 13 and the medium on the heat pump 30 side and the heat storage auxiliary equipment 20 side. Specifically, the heat exchanger 40 exchanges heat between groundwater pumped up from the hot water well 11 and flowing through the pipe 13 as the water in the pipe 13, and the medium on the heat pump 30 side and the heat storage auxiliary equipment 20 side. The groundwater after the heat exchange flows from the heat exchanger 40 through the pipe 13 and is injected into the cold water well 12. Conversely, the heat exchanger 40 exchanges heat between groundwater pumped up from the cold water well 12 and flowing through the pipe 13 as the water in the pipe 13, and the medium on the heat pump 30 side and the heat storage auxiliary equipment 20 side. The groundwater after the heat exchange flows from the heat exchanger 40 through the pipe 13 and is injected into the hot water well 11.
  • the heat exchanger 40 is provided midway through the piping 13 that extends above ground.
  • hot water heat storage is performed in the hot water well 11 .
  • cold water heat storage is performed in the cold water well 12 .
  • hot water refers to water with a temperature higher than the initial underground temperature of the groundwater in the aquifer LY
  • cold water refers to water with a temperature lower than the initial underground temperature of the groundwater in the aquifer LY.
  • the initial underground temperature of the groundwater in the aquifer LY is 18°C.
  • the heat pump 30 includes a condenser, an evaporator, a compressor, etc., and is provided between the device AA and the pipe 13 via a heat exchanger 40 .
  • the heat pump 30 cools or heats the medium that has exchanged heat with the water in the pipe 13 in the heat exchanger 40. In this way, the heat pump 30 uses the hot or cold heat obtained from the water in the pipe 13 for the equipment AA, while storing the exhaust hot or cold heat discharged from the equipment AA in the water in the pipe 13 via the heat exchanger 40.
  • a turbo heat pump is used as the heat pump 30 .
  • the geothermal energy utilization system 1 further includes a plurality of switching valves 61 and a pump 62 , which control the flow of the medium flowing between the heat pump 30 and the heat exchanger 40 .
  • the multiple switching valves 61 and the pump 62 are provided between the heat pump 30 and the heat exchanger 40 .
  • the geothermal energy utilization system 1 further includes a pump 70 between the heat pump 30 and the device AA, and a medium flows between the heat pump 30 and the device AA.
  • the heat storage auxiliary equipment 20 heats the cold water in the pipe 13 in the heat exchanger 40 via the medium, and assists in storing heat in the hot water well 11 .
  • the heat storage auxiliary equipment 20 includes an exhaust heat recovery mechanism 201 , a cooling tower 202 , and an air-cooled heat pump 203 .
  • the exhaust heat recovery mechanism 201 recovers exhaust heat generated in each process in the factory in which the device AA is installed, and heats the medium in the heat storage auxiliary equipment 20 .
  • the exhaust heat recovered by the exhaust heat recovery mechanism 201 is used for auxiliary heat storage in the hot water well 11 .
  • the cooling tower 202 has a normal function of cooling the medium of the heat storage auxiliary equipment 20 by utilizing the heat of vaporization generated when water is brought into contact with the atmosphere and vaporized, and also has a function as a heating tower in this embodiment. That is, the cooling tower 202 can cool the medium of the heat storage auxiliary equipment 20 when the atmospheric temperature is low, for example in winter, but can heat the medium of the heat storage auxiliary equipment 20 when the atmospheric temperature is high, for example in summer. Therefore, the cooling tower 202 can be used not only as a facility for auxiliary cold storage in the cold water well 12, but also as a facility for auxiliary heat storage in the hot water well 11. For example, the cooling tower 202 may be configured to heat the medium of the heat storage auxiliary facility 20 when the outside air temperature is higher than the set water supply temperature.
  • the air-cooled heat pump 203 includes a condenser, an evaporator, a compressor, and the like, and heats the medium in the thermal storage auxiliary equipment 20 .
  • the air-cooled heat pump 203 can perform heating operation throughout the year.
  • the heat generated by heating the medium in the air-cooled heat pump 203 is used for auxiliary heat storage in the hot water well 11.
  • the heat generated by heating the medium in the air-cooled heat pump 203 is also used for heating in the equipment AA.
  • the thermal storage auxiliary equipment 20 further includes a plurality of switching valves 204 , a pump 205 , a heat exchanger 206 , and an outlet thermometer 207 .
  • the primary side of the heat exchanger 206 is connected to the heat exchanger 40 via a pump 62 so that the medium flows between the heat exchanger 40 and the primary side.
  • the heat storage auxiliary equipment 20 can switch between a circuit for flowing a medium between the heat exchanger 206 and the cooling tower 202 and a circuit for flowing a medium between the heat exchanger 206 and the exhaust heat recovery mechanism 201 by switching multiple switching valves 204 in response to commands from the control device 50.
  • the heat storage auxiliary equipment 20 can connect the secondary side of the heat exchanger 206 to the cooling tower 202 or the exhaust heat recovery mechanism 201 so that a medium flows between the secondary side of the heat exchanger 206 and the cooling tower 202 or the exhaust heat recovery mechanism 201.
  • the heat storage auxiliary equipment 20 can switch between the operation of storing the heat obtained in the cooling tower 202 in the water in the piping 13 and the operation of storing the heat obtained in the exhaust heat recovery mechanism 201 in the water in the piping 13 via the heat exchanger 40.
  • the outlet thermometer 207 is provided at the outlet of the medium heading to the heat exchanger 40 on the primary side of the heat exchanger 206.
  • the heat storage auxiliary equipment 20 further includes a plurality of switching valves 208 .
  • the air-cooling heat pump 203 is connected to the heat exchanger 40 via a plurality of switching valves 208 and a pump 62 .
  • the thermal storage auxiliary equipment 20 can switch the multiple switching valves 208 in response to a command from the control device 50. This allows the thermal storage auxiliary equipment 20 to switch between an operation of connecting to the heat exchanger 40 so that a medium flows between the air-cooled heat pump 203 and the heat exchanger 40 via the pump 62, and an operation of disconnecting from the heat exchanger 40 so that a medium does not flow between the air-cooled heat pump 203 and the heat exchanger 40.
  • the geothermal energy utilization system 1 further includes a plurality of switching valves 80 between the air-cooled heat pump 203 and the device AA. This allows the geothermal energy utilization system 1 to switch between an operation of connecting the air-cooled heat pump 203 to the device AA so that a medium flows between the air-cooled heat pump 203 and the device AA, and an operation of disconnecting the air-cooled heat pump 203 from the device AA so that a medium does not flow between the air-cooled heat pump 203 and the device AA.
  • the control device 50 functionally includes a first mode control unit 511 , a second mode control unit 512 , a third mode control unit 513 , an outlet temperature control unit 514 , and an injection water temperature control unit 515 .
  • the control device 50 has a hardware configuration including a CPU 51, a memory 52, a communication interface 53, and a recording medium 54.
  • the CPU 51 is a processor that performs various functions by operating according to pre-prepared programs. The functions of the CPU 51 will be described later.
  • Memory 52 has storage space necessary for the operation of CPU 51.
  • the communication interface 53 is a connection interface for connecting to other devices so as to be able to communicate with them via a communication line or the like, and is configured to be able to send commands to other devices and receive responses from other devices.
  • the CPU 51 operates according to a pre-prepared program, thereby performing the functions of a first mode control unit 511, a second mode control unit 512, a third mode control unit 513, an outlet temperature control unit 514, and an inlet water temperature control unit 515, as described above.
  • the first mode control unit 511 controls the geothermal energy utilization system 1 in the first mode.
  • the first mode is a mode that is mainly performed in the summer, in which cold heat stored in the cold water well 12 is supplied to the equipment AA, and hot heat obtained from the equipment AA is stored in the hot water well 11.
  • the third mode control unit 513 controls the geothermal energy utilization system 1 in the third mode.
  • the third mode is a mode that is mainly implemented in winter, in which hot heat stored in the hot water well 11 is supplied to the equipment AA, and cold heat obtained from the equipment AA is stored in the cold water well 12.
  • the outlet temperature control unit 514 controls the geothermal energy utilization system 1 so that the temperature of the medium at the outlet of the thermal storage auxiliary equipment 20 measured by the outlet thermometer 207 is constant.
  • the water injection temperature control unit 515 controls the geothermal energy utilization system 1 so that the water injection temperature measured by the water injection thermometer 15 is constant as the water injection temperature into the hot water well 11 or the cold water well 12.
  • control device 50 (Operation of the control device) The operation of the control device 50 of this embodiment will be described.
  • the operation of the control device 50 corresponds to an embodiment of a control method.
  • the control device 50 carries out each step shown in FIG.
  • the first mode control unit 511 controls the geothermal energy utilization system 1 in the first mode (ST01: first mode control step).
  • the first mode is mainly implemented in the summer.
  • the first mode is the operation when the device AA is using cooling.
  • the first mode control unit 511 sends a command to the pump PP of the cold water well 12 to operate, and sends a command to the water inlet valve VA of the hot water well 11 to open.
  • the first mode control unit 511 switches the switching valves 61, 204, and 208 so that the medium flows to the device AA and the medium does not flow to the thermal storage auxiliary equipment 20.
  • the geothermal energy utilization system 1 pumps cold water stored in the cold water well 12 into the pipe 13 and supplies it to the heat exchanger 40, thereby cooling the medium on the heat pump 30 side.
  • the cooled medium functions as a refrigerant for cooling in the device AA.
  • the cold water supplied to the heat exchanger 40 becomes hot water by cooling the medium on the heat pump 30 side, and is discharged through the pipe 13 toward the hot water well 11 and poured into the hot water well 11.
  • the water injection temperature control unit 515 performs inverter control of the pump PP of the cold water well 12, control of the regulating valve 16, etc. so that the temperature of water injected into the hot water well 11 is constant.
  • the second mode control unit 512 controls the geothermal utilization system 1 in the second mode instead of the first mode (ST02: second mode control step).
  • the second mode is implemented in summer.
  • the second mode control unit 512 detects that it is summer by acquiring the date, the average outside temperature, an operator's input, etc., and controls the geothermal energy utilization system 1 in the second mode in summer.
  • the second mode is a mode used when a shortage of hot water is predicted in winter, such as in cold regions, and is an operation for storing hot water in the hot water well 11 separately from the first mode, for example, in summer in preparation for winter, by heating cold water pumped from the cold water well 12 using the heat storage auxiliary equipment 20.
  • the second mode control unit 512 sends a command to the pump PP of the cold water well 12 to operate, and sends a command to the water inlet valve VA of the hot water well 11 to open. Furthermore, in the second mode, the second mode control unit 512 sends commands to the switching valves 61, 204, and 208 so that the medium flows through the thermal storage auxiliary equipment 20 and so that the medium does not flow through the device AA. As a result, the geothermal heat utilization system 1 pumps the cold water stored in the cold water well 12 into the piping 13 and supplies it to the heat exchanger 40.
  • a medium heated by the heat storage auxiliary equipment 20 is supplied to the heat exchanger 40 on the side of the heat storage auxiliary equipment 20, and the cold water supplied from the cold water well 12 to the heat exchanger 40 is heated to hot water.
  • the heated hot water is discharged through the piping 13 toward the hot water well 11 and poured into the hot water well 11.
  • hot water is stored in the hot water well 11 in addition to the hot water stored in the first mode.
  • the outlet temperature control unit 514 controls the geothermal energy utilization system 1 so that the temperature of the medium at the outlet of the heat storage auxiliary equipment 20 is constant
  • the water injection temperature control unit 515 controls the geothermal energy utilization system 1 so that the temperature of the water injected into the hot water well 11 is constant.
  • the control device 50 automatically switches the operating mode of the geothermal energy utilization system 1 to one of the following modes: exhaust heat utilization mode, cooling tower utilization mode, or air-cooled heat pump utilization mode, taking into account the heating and cooling load of equipment AA and the outside air temperature, etc.
  • the control device 50 When there is exhaust heat generated in each process in the factory in which the equipment AA is installed, the control device 50 operates the geothermal energy utilization system 1 in an exhaust heat utilization mode in which the exhaust heat is utilized and stored in the hot water well 11.
  • the water injection temperature control unit 515 performs inverter control of the pump PP of the cold water well 12 so that the temperature of water injected into the hot water well 11 is constant, and at the same time performs bypass control so that the heat obtained in the exhaust heat recovery mechanism 201 can be stored in the water in the piping 13.
  • the water injection temperature control unit 515 performs bypass control to send a command to the switching valve 204 so that a medium flows between the exhaust heat recovery mechanism 201 and the heat exchanger 206 as shown in Fig. 6, and at the same time performs inverter control of the pump 205 and control of the adjustment valve 16 so that the temperature of the medium at the outlet of the thermal storage auxiliary equipment 20 is constant.
  • the control device 50 operates the cooling tower 202 as the cooling tower utilization mode to operate the geothermal heat utilization system 1 in a mode in which heat is stored in the hot water well 11.
  • the operating condition for this mode is when the outside air wet bulb temperature is higher than the set water injection temperature.
  • the water injection temperature control unit 515 performs inverter control of the pump PP of the cold water well 12 so that the temperature of the water injected into the hot water well 11 is constant, and at the same time performs bypass control so that the heat obtained in the cooling tower 202 can be stored in the water in the piping 13.
  • the water supply temperature control unit 515 performs bypass control to send a command to the switching valve 204 so that the medium flows between the cooling tower 202 and the heat exchanger 206 as shown in FIG. 7, and at the same time performs inverter control of the pump 205 and control of the regulating valve 16 so that the temperature of the medium at the outlet of the heat storage auxiliary equipment 20 is constant.
  • Air-cooled heat pump usage mode When the hot water for winter heating is insufficient with only the exhaust heat utilization mode and the cooling tower utilization mode, the control device 50 operates the geothermal heat utilization system 1 in an air-cooled heat pump utilization mode, in which the air-cooled heat pump 203 is operated to store heat in the hot water well 11. At that time, the water supply temperature control unit 515 sends a command to the switching valve 208 to allow a medium to flow between the air-cooled heat pump 203 and the heat exchanger 40 as shown in FIG.
  • the feature of this mode is that it can store hot water heat whenever necessary, and since it performs heating operation in summer, the COP (Coefficient Of Performance) of the air-cooled heat pump 203 is high, and the COP of the entire system can be improved.
  • ST01 is carried out again, and thereafter, ST01 and ST02 are repeated, for example, over the summer.
  • the third mode control unit 513 controls the geothermal energy utilization system 1 in the third mode (third mode control step: ST03).
  • the third mode is mainly implemented in winter.
  • the third mode is the operation when the appliance AA is using heating.
  • the third mode control unit 513 sends a command to the pump PP of the hot water well 11 to operate, and sends a command to the water inlet valve VA of the cold water well 12 to open.
  • the third mode control unit 513 sends commands to the switching valves 61, 204, and 208 to allow the medium to flow to the device AA and to prevent the medium from flowing to the thermal storage auxiliary equipment 20.
  • the geothermal energy utilization system 1 pumps hot water stored in the hot water well 11 into the pipe 13 and supplies it to the heat exchanger 40, thereby heating the medium on the heat pump 30 side, and the heated medium functions as a heat medium for heating in the device AA.
  • the hot water supplied to the heat exchanger 40 heats the medium on the heat pump 30 side, turns into cold water, and is discharged through the pipe 13 toward the cold water well 12, and is poured into the cold water well 12.
  • cold water is stored in the cold water well 12.
  • the water injection temperature control unit 515 performs inverter control of the pump PP of the hot water well 11, control of the regulating valve 16, etc. so that the temperature of water injected into the cold water well 12 is constant.
  • the geothermal energy utilization system 1 switches the multiple switching valves 80 to connect the air-cooled heat pump 203 to the device AA so that a medium flows between the device AA and the air-cooled heat pump 203, and uses the air-cooled heat pump 203 for heating the device AA.
  • control device 50 can store the hot water obtained from the heat storage auxiliary equipment 20 in the hot water well 11 in addition to the hot water obtained from the equipment AA. This makes it difficult for the stored heat to become insufficient.
  • the exhaust heat recovery mechanism 201 recovers the exhaust heat from the factory, so that the exhaust heat can be effectively utilized. This reduces the environmental burden.
  • control device 50 can control the temperature of the medium at the outlet of the thermal storage auxiliary equipment 20 to be constant. Therefore, the heat storage auxiliary equipment 20 can stably assist in storing heat in the hot water well 11 .
  • control device 50 can control the temperature of the water injected into the hot water well 11 to a constant value, so the temperature of the hot water well 11 can be kept constant.
  • control device 50 can store the hot water obtained from the heat storage auxiliary equipment 20 in the hot water well 11 in the summer by controlling in the second mode in the summer. Therefore, the geothermal energy utilization system 1 can easily store heat even in cold regions and can continuously utilize geothermal energy.
  • the control device 50 of this embodiment can store the hot heat obtained from the heat storage auxiliary equipment 20 in the summer in the hot water well 11, making it easy to introduce the geothermal heat utilization system 1 into cold regions.
  • heat exchange occurs between the water in the pipe 13 and the medium on the equipment AA side and the heat storage auxiliary equipment 20 side, making it easy to absorb heat between the heat source well equipment 10 and the equipment AA, and between the heat source well equipment 10 and the heat storage auxiliary equipment 20.
  • the heat storage auxiliary equipment 20 includes a cooling tower 202, which allows for effective use of natural energy and achieves energy savings, thereby contributing to carbon neutrality.
  • the heat storage auxiliary equipment 20 includes an exhaust heat recovery mechanism 201, a cooling tower 202, and an air-cooled heat pump 203, so that the system can be constructed according to the user's needs.
  • the second mode control unit 512 controls the geothermal energy utilization system 1 in the second mode during the summer, but it may be controlled in any manner as long as the hot heat obtained from the heat storage auxiliary equipment 20 can be stored in the hot water well 11.
  • the second mode control unit 512 may control the geothermal utilization system 1 in the second mode in spring, autumn, or winter other than summer, in addition to summer.
  • the second mode control unit 512 may control the geothermal utilization system 1 in the second mode regardless of the season.
  • the second mode control unit 512 may perform control in the second mode when the outside air temperature is higher than the set water supply temperature.
  • the heat storage auxiliary equipment 20 includes an exhaust heat recovery mechanism 201, a cooling tower 202, and an air-cooled heat pump 203, but may be configured in any manner as long as it can assist in storing heat in the hot water well 11.
  • the thermal storage auxiliary equipment 20 may include the exhaust heat recovery mechanism 201 and the cooling tower 202 , but may not include the air-cooled heat pump 203 .
  • the thermal storage auxiliary equipment 20 may include at least one of an exhaust heat recovery mechanism 201 , a cooling tower 202 , and an air-cooled heat pump 203 .
  • the heat storage auxiliary equipment 20 uses only the cooling tower 202 out of the exhaust heat recovery mechanism 201, the cooling tower 202, and the air-cooled heat pump 203, but they may be used in any way as long as they can assist in storing heat in the hot water well 11.
  • the heat storage auxiliary equipment 20 may use the exhaust heat recovery mechanism 201 and the cooling tower 202 simultaneously.
  • the water injection temperature control unit 515 may perform bypass control so that a medium flows between the cooling tower 202 and the heat exchanger 206, and between the exhaust heat recovery mechanism 201 and the heat exchanger 206, as shown in FIG. 10. This allows the heat storage auxiliary equipment 20 to use the exhaust heat recovery mechanism 201 and the cooling tower 202 in parallel at the same time.
  • the heat storage auxiliary equipment 20 may simultaneously use the exhaust heat recovery mechanism 201, the cooling tower 202, and the air-cooled heat pump 203. For example, as shown in FIG.
  • control device 50 may perform bypass control so that a medium flows between the air-cooled heat pump 203 and the heat exchanger 40, between the cooling tower 202 and the heat exchanger 206, and between the exhaust heat recovery mechanism 201 and the heat exchanger 206. This allows the heat storage auxiliary equipment 20 to simultaneously use the exhaust heat recovery mechanism 201, the cooling tower 202, and the air-cooled heat pump 203 in parallel.
  • a program for realizing the various functions of the control device 50 is recorded on a computer-readable recording medium, and the program recorded on this recording medium is read into a computer system and executed to perform various processes.
  • the various processes of the CPU 51 of the computer system are stored in the form of a program on a computer-readable recording medium, and the computer reads and executes this program to perform the various processes.
  • computer-readable recording media refers to magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, etc.
  • the computer program may be distributed to a computer via a communication line, etc., and the computer that receives the distribution may execute the program.
  • control device 50 the geothermal heat utilization system 1, the control method, and the program described in the above-described embodiment can be understood, for example, as follows.
  • the control device 50 includes a first mode control unit 511 that controls a geothermal heat utilization system 1 including a heat source well facility 10 including a hot water well 11 and a cold water well 12, and a heat storage auxiliary facility 20 including an exhaust heat recovery mechanism 201, a cooling tower 202, or an air-cooled heat pump 203, in a first mode in which cold heat stored in the cold water well 12 is supplied to equipment AA and hot heat obtained from the equipment AA is stored in the hot water well 11, and a second mode control unit 512 that controls the geothermal heat utilization system 1 in a second mode in which, instead of the first mode, cold heat stored in the cold water well 12 is supplied to the heat storage auxiliary facility 20 and hot heat obtained from the heat storage auxiliary facility 20 is stored in the hot water well 11.
  • a first mode control unit 511 that controls a geothermal heat utilization system 1 including a heat source well facility 10 including a hot water well 11 and a cold water well 12, and a heat storage auxiliary facility 20 including an exhaust heat recovery mechanism 201,
  • control device 50 can store the hot water obtained from the heat storage auxiliary equipment 20 in the hot water well 11 in addition to the hot water obtained from the equipment AA. This makes it difficult for the stored heat to become insufficient.
  • the control device 50 according to the second aspect is the control device 50 according to (1) in which the exhaust heat recovery mechanism 201 recovers exhaust heat from a factory.
  • the exhaust heat recovery mechanism 201 can effectively utilize the exhaust heat. This reduces the environmental burden.
  • the control device 50 according to the third aspect is the control device 50 according to (1) or (2), further including an outlet temperature control unit 514 that controls the geothermal heat utilization system 1 so that the temperature of the medium at the outlet of the thermal storage auxiliary equipment 20 is constant.
  • control device 50 can control the temperature of the medium at the outlet of the thermal storage auxiliary equipment 20 to be constant. Therefore, the heat storage auxiliary equipment 20 can stably assist in storing heat in the hot water well 11 .
  • the control device 50 according to the fourth aspect is any one of the control devices 50 of (1) to (3), further including a water injection temperature control unit 515 that controls the geothermal energy utilization system 1 so that the temperature of water injected into the hot water well 11 is constant.
  • control device 50 can control the temperature of the water injected into the hot water well 11 to a constant value, thereby keeping the temperature of the hot water well 11 constant.
  • the control device 50 according to the fifth aspect is any one of the control devices 50 of (1) to (4) in which the second mode control unit 512 controls the geothermal energy utilization system in the second mode during the summer.
  • control device 50 can store the hot water obtained from the heat storage auxiliary equipment 20 in the hot water well 11 during the summer. Therefore, the geothermal energy utilization system 1 can easily store heat even in cold regions and can continuously utilize geothermal energy.
  • the control device 50 according to the sixth aspect is any one of the control devices 50 of (1) to (5), in which the heat source well facility 10 further includes a pipe 13 connecting the hot water well 11 and the cold water well 12, and a heat exchanger 40 for exchanging heat between the water in the pipe 13 and the medium on the device AA side and the heat storage auxiliary facility 20 side.
  • heat is exchanged between the water in the pipe 13 and the medium on the equipment AA side and the heat storage auxiliary equipment 20 side, so heat is easily absorbed between the heat source well equipment 10 and the equipment AA, and between the heat source well equipment 10 and the heat storage auxiliary equipment 20.
  • the geothermal heat utilization system 1 includes any one of the control devices 50 described in (1) to (6), the heat source well facility 10, and the heat storage auxiliary facility 20.
  • the geothermal heat utilization system 1 can store the hot water obtained from the heat storage auxiliary equipment 20 in the hot water well 11 in addition to the hot water obtained from the equipment AA. This makes it difficult for the stored heat to become insufficient.
  • the control method controls a geothermal heat utilization system 1, which includes a heat source well facility 10 including a hot water well 11 and a cold water well 12, and a heat storage auxiliary facility 20 including an exhaust heat recovery mechanism 201, a cooling tower 202, or an air-cooled heat pump 203, in a first mode in which cold heat stored in the cold water well 12 is supplied to equipment AA and hot heat obtained from the equipment AA is stored in the hot water well 11, and instead of the first mode, controls the geothermal heat utilization system 1 in a second mode in which cold heat stored in the cold water well 12 is supplied to the heat storage auxiliary facility 20 and hot heat obtained from the heat storage auxiliary facility 20 is stored in the hot water well 11.
  • a geothermal heat utilization system 1 which includes a heat source well facility 10 including a hot water well 11 and a cold water well 12, and a heat storage auxiliary facility 20 including an exhaust heat recovery mechanism 201, a cooling tower 202, or an air-cooled heat pump 203, in a first mode in which cold heat stored in the cold
  • control method can store the hot water obtained from the heat storage auxiliary equipment 20 in the hot water well 11 in addition to the hot water obtained from the equipment AA. This makes it difficult for the stored heat to become insufficient.
  • the program according to the ninth aspect causes a computer to execute the following operations: Controlling a geothermal heat utilization system 1, which includes a heat source well facility 10 including a hot water well 11 and a cold water well 12, and a heat storage auxiliary facility 20 including an exhaust heat recovery mechanism 201, a cooling tower 202, or an air-cooled heat pump 203, in a first mode in which cold heat stored in the cold water well 12 is supplied to equipment AA and hot heat obtained from the equipment AA is stored in the hot water well 11; and instead of the first mode, controlling the geothermal heat utilization system 1 in a second mode in which cold heat stored in the cold water well 12 is supplied to the heat storage auxiliary facility 20 and hot heat obtained from the heat storage auxiliary facility 20 is stored in the hot water well 11.
  • a geothermal heat utilization system 1 which includes a heat source well facility 10 including a hot water well 11 and a cold water well 12, and a heat storage auxiliary facility 20 including an exhaust heat recovery mechanism 201, a cooling tower 202, or an air-cooled heat pump
  • the program can store the heat obtained from the heat storage auxiliary equipment 20 in the hot water well 11 in addition to the heat obtained from the equipment AA. This makes it difficult for the stored heat to become insufficient.
  • the stored heat is less likely to become insufficient.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Energy (AREA)
  • Hydrology & Water Resources (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

Est divulgué un appareil de commande comprenant une première unité de commande de mode qui commande un système d'utilisation de chaleur géothermique dans un premier mode dans lequel le froid stocké dans le puits d'eau froide est acheminé vers un dispositif, et la chaleur obtenue du dispositif est stockée dans le puits d'eau chaude, le système d'utilisation de chaleur géothermique comprenant : une installation de puits de source de chaleur comprenant un puits d'eau chaude et un puits d'eau froide ; et une installation auxiliaire de stockage de chaleur comprenant un mécanisme de récupération de chaleur d'échappement, une tour de refroidissement ou une pompe à chaleur refroidie par air. L'appareil de commande comprend également une deuxième unité de commande de mode qui commande le système d'utilisation de chaleur géothermique dans un deuxième mode, au lieu du premier mode, dans lequel le froid stocké dans le puits d'eau froide est acheminé vers l'installation auxiliaire de stockage de chaleur et la chaleur obtenue de l'installation auxiliaire de stockage de chaleur est stockée dans le puits d'eau chaude.
PCT/JP2023/038921 2022-11-18 2023-10-27 Appareil de commande, système d'utilisation de chaleur géothermique, procédé de commande et programme associé WO2024106180A1 (fr)

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JP2022184746A JP7439220B1 (ja) 2022-11-18 2022-11-18 制御装置、地中熱利用システム、制御方法、及びプログラム
JP2022-184746 2022-11-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118655177A (zh) * 2024-08-19 2024-09-17 山东科技大学 钻完井液浸染地热储层影响生产井采热效率的测试装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340567U (fr) * 1976-09-13 1978-04-08
JPH11325650A (ja) * 1998-05-19 1999-11-26 Takenaka Komuten Co Ltd 蓄熱システム
JP2016161193A (ja) * 2015-02-27 2016-09-05 三菱マテリアルテクノ株式会社 冷温熱同時蓄熱システムを有する地中熱ヒートポンプシステム
JP2018173257A (ja) * 2017-03-31 2018-11-08 三菱重工サーマルシステムズ株式会社 地中熱利用システム及び地中熱利用方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340567U (fr) * 1976-09-13 1978-04-08
JPH11325650A (ja) * 1998-05-19 1999-11-26 Takenaka Komuten Co Ltd 蓄熱システム
JP2016161193A (ja) * 2015-02-27 2016-09-05 三菱マテリアルテクノ株式会社 冷温熱同時蓄熱システムを有する地中熱ヒートポンプシステム
JP2018173257A (ja) * 2017-03-31 2018-11-08 三菱重工サーマルシステムズ株式会社 地中熱利用システム及び地中熱利用方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118655177A (zh) * 2024-08-19 2024-09-17 山东科技大学 钻完井液浸染地热储层影响生产井采热效率的测试装置

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