CN113531630A - Low-cost operation geothermal heating-energy storage integrated system and application - Google Patents
Low-cost operation geothermal heating-energy storage integrated system and application Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 claims abstract description 100
- 239000008236 heating water Substances 0.000 claims description 21
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
- F24D3/1066—Distributors for heating liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- 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
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- 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
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Abstract
The invention relates to a low-cost operation geothermal heating-energy storage integrated system, which comprises a geothermal direct heating unit, a heat pump heating unit, an energy storage unit and a heat user unit, wherein the direct heating unit and the heat pump heating unit heat the heat user unit together through a water collector and store energy for the energy storage unit at the same time, and circulating water from the heat user unit is respectively connected to the geothermal direct heating unit and the heat pump heating unit through a water separator for circulating heating; the outlet end of the energy storage unit is connected with the geothermal direct heating unit and the heat pump warming unit, the direct heating unit and the heat pump warming unit are supplied with energy when the direct heating unit and the heat pump warming unit do not heat, the energy storage unit is also provided with an energy release heating loop which is connected with the inlet of the water collector and forms the energy storage unit through a backflow branch of the water separator, and the direct heating unit and the heat pump warming unit heat a heat user unit when not working. The system adopts the water distributor and the water collector to adjust the water supply and return pressure of a user, and balances the pressure of each part by utilizing three heating modes of geothermal direct heating, heat pump system heating and energy storage heating, so that the heating and energy storage can run efficiently.
Description
Technical Field
The invention belongs to the field of geothermal resource utilization, relates to a geothermal heating-energy storage technology, and particularly relates to a geothermal heating-energy storage integrated system operating at low cost and application thereof.
Background
With the increasing global energy demand, the environmental pollution problem becomes more serious, so the development and utilization of renewable energy sources become the main direction of energy development nowadays. The geothermal energy is widely applied to various fields of power generation, heating and the like due to the advantages of large storage capacity, stability, reliability and the like.
But the geothermal resources in China are mainly medium-low temperature geothermal heat, so that the geothermal resources suitable for power generation are few, and most geothermal resources are suitable for the fields with heat demands, such as heating. At present, most geothermal heating is a geothermal water direct supply mode, the geothermal return water temperature of the mode is high, waste of geothermal resources is caused, and meanwhile, related policies are issued by the nation, the geothermal return water temperature is required to be reduced, and the utilization efficiency of geothermal resources is improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a low-cost operation geothermal heating-energy storage integrated system which realizes high-efficiency utilization of geothermal energy and solves the problems of overhigh return water temperature, high system operation cost and the like of the conventional heating system.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a low-cost operation geothermal heating-energy storage integrated system comprises a geothermal direct heating unit, a heat pump heating unit, an energy storage unit and a heat user unit, wherein the direct heating unit and the heat pump heating unit heat the heat user unit together through a water collector and simultaneously store energy for the energy storage unit, and circulating water from the heat user unit is respectively connected to the geothermal direct heating unit and the heat pump heating unit through a water separator for circulating heating; the outlet end of the energy storage unit is connected with the geothermal direct heating unit and the heat pump heating unit, and supplies energy to the direct heating unit and the heat pump heating unit when the direct heating unit and the heat pump heating unit do not supply heat; the energy storage unit is also provided with an energy releasing and heating loop which is connected with the inlet of the water collector and forms an energy storage unit through a backflow of one branch of the water separator, and the energy releasing and heating loop supplies heat for the heat user unit when the direct heating unit and the heat pump heating unit do not work.
And the direct heating unit comprises a hot water well, the outlet end of the hot water well is connected with the interlayer inlet end of the high-temperature plate type heat exchanger, one heat exchange outlet end of the high-temperature plate type heat exchanger is connected with the inlet end of a water collector, the other heat exchange outlet end of the high-temperature plate type heat exchanger is connected with the inlet end of an energy storage device of the energy storage unit, the outlet end of the water collector is connected with the user inlet end of the heat user unit, a water separator is arranged at the user outlet end, one outlet end of the water separator is connected with the heat exchange inlet end of the high-temperature plate type heat exchanger, one outlet end of the heat pump is connected with the inlet end of a heat pump unit of the heat pump heating unit, one outlet end of the heat pump unit and the heat exchange outlet end of the high-temperature plate type heat exchanger are converged and connected with the inlet end of the water collector, the other outlet end of the energy storage device is connected with the inlet end of the energy storage device to store energy for the energy storage unit, one outlet end of the energy storage unit is connected with the inlet end of the high-temperature plate type heat exchanger, and one outlet end of the energy storage device is connected with the heat pump unit, the energy storage unit is also provided with an energy releasing and heating loop which is connected with the inlet of the water collector and flows back to the energy storage device through one branch of the water distributor to form the energy storage device.
And a low-temperature plate heat exchanger is arranged on one side of the heat pump unit, the outlet end of the interlayer of the high-temperature plate heat exchanger is connected to the inlet end of the interlayer of the low-temperature plate heat exchanger, and the outlet end of the interlayer of the low-temperature plate heat exchanger is connected to the recharging well in a backflow mode.
And the energy storage device is a horizontal energy storage water tank, a heat supply pump is arranged between the energy storage device and the water collector, and the heat supply pump is arranged between the energy storage device and the heat pump unit.
And a heat supply pump is arranged between the outlet end of the water separator and the inlet end of the heat pump unit, a circulating water pump is arranged between the low-temperature plate type heat exchanger and the heat pump unit, and a water suction pump is arranged between the outlet end of the hot water well and the high-temperature plate type heat exchanger.
The application of the low-cost operation geothermal heating-energy storage integrated system comprises a heating stage, an energy storage stage and an energy release stage.
In the heating stage, valves V1, V3, V4, V5, V7, V8 and V9 are opened, valves V2, V6, V10 and V11 are closed, high-temperature geothermal water is pumped from an outlet of a geothermal well, flows through a high-temperature plate heat exchanger, transfers heat to hot water, flows to a low-temperature plate heat exchanger, is regulated by an electric valve to flow through a water collector after absorbing heat in the high-temperature plate heat exchanger, is conveyed to a user for heating through a pump, then flows to a water separator and returns to the high-temperature plate heat exchanger to complete circulation, geothermal water which is subjected to heat release through the high-temperature plate heat exchanger transfers heat to circulating water through the low-temperature plate heat exchanger, is conveyed back to an inlet of the geothermal well to complete recharging, flows to an evaporator of a heat pump system after absorbing heat in the low-temperature plate heat exchanger, transfers heat to working media of the heat pump system, is evaporated after absorbing heat, and enters a condenser of the heat pump system after being compressed, and then the heating water enters the secondary evaporator after being throttled by the throttle valve to complete circulation, the heating water absorbs heat in a condenser of the heat pump system and then flows to a water collector, then is conveyed to a user by a pump for heating, and then flows to a water separator and then flows to the condenser of the heat pump system to complete circulation.
In the energy storage stage, valves V4, V6, V7, V8, V9 and V10 are opened, valves V1, V2, V3, V5 and V11 are closed, when a user does not need heating, the heating water absorbing heat in the high-temperature plate heat exchanger stores energy in the energy storage device, and the hot water absorbing heat in the heat pump condenser stores energy in the energy storage device.
In addition, in the energy release stage, the valves V1, V2 and V11 are opened, the valves V3, V4, V5, V6, V7, V8, V9 and V10 are closed, when a user has a heat demand, the energy storage device conveys heating water to the water collector, then the heating water is conveyed to the user by the pump, then the heating water is conveyed to the water separator, and finally the heating water returns to the energy storage device to complete the circulation.
The invention has the advantages and positive effects that:
1. the low-cost operation geothermal heating-energy storage integrated system provided by the invention adopts two heat sources to store energy for the energy storage device: the first heat source is high-temperature geothermal water which directly stores energy for the energy storage device after heat exchange of the high-temperature plate type heat exchanger. The second heat source is a heat pump system, and the high-temperature geothermal water is subjected to heat exchange through a high-temperature plate heat exchanger, then the temperature of the geothermal water is reduced, and the geothermal water is heated through the heat pump system and then stores energy for the energy storage device.
2. The low-cost operation geothermal heating-energy storage integrated system provided by the invention adopts an electric valve automatic control system, and the system automatically switches between the operation modes of direct heating, heat pump system heating, energy storage of the energy storage device and energy release of the energy storage device through automatic control.
3. The low-cost geothermal heating-energy storage integrated system provided by the invention adopts the water distributor and the water collector to adjust the pressure of supply and return water of a user, adopts three heating modes of geothermal direct heating, heat pump system heating and energy storage device heating, and adopts the water distributor and the water collector to balance the pressure of each part due to different pressures of the three heating modes, so that the heating and energy storage can be operated efficiently.
4. The low-cost operation geothermal heating-energy storage integrated system provided by the invention adopts the horizontal energy storage water tank as the energy storage device, solves the problems of difficult site selection, large occupied area, overhigh water pressure and the like in the prior art, and can effectively reduce the construction cost of the energy storage device.
5. The low-cost operation geothermal heating-energy storage integrated system provided by the invention adopts an operation strategy of utilizing peak-valley electricity price, the system is operated at the valley electricity price at night, the energy storage device is stored by the geothermal direct heating system and the heat pump system, the energy storage device is firstly operated to release heat energy to heat a user at the peak electricity price in the daytime, and the geothermal direct heating and heat pump system are adopted to heat after the heat energy in the energy storage device is released, so that the operation strategy effectively reduces the operation time of the system at the peak electricity price and reduces the operation cost of the system.
6. The system adopts the branch and water collector to adjust the supply and return water pressure of a user, adopts three heating modes of geothermal direct heating, heat pump system heating and energy storage device heating, balances the pressure of each part, enables the heating and energy storage to operate efficiently, can realize the sectional utilization of the geothermal temperature, and simultaneously utilizes the peak-valley electricity price to realize the low-cost operation of the system.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of the geothermal direct heating-heat pump system heating flow direction of the present invention;
FIG. 3 is a schematic diagram of the energy storage flow of the geothermal direct energy storage-heat pump system according to the present invention;
FIG. 4 is a schematic diagram of the flow of energy released by the energy storage device for heating in accordance with the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
A low-cost geothermal heating-energy storage integrated system comprises a geothermal direct heating unit, a heat pump heating unit, an energy storage unit and a heat user unit, wherein the direct heating unit comprises a hot water well, the outlet end of the hot water well is connected with the interlayer inlet end of a high-temperature plate type heat exchanger, one of the heat exchange outlet ends of the high-temperature plate type heat exchanger is connected with the inlet end of a water collector, the other heat exchange outlet end of the high-temperature plate type heat exchanger is connected with the inlet end of an energy storage device of the energy storage unit, the outlet end of the water collector is connected to the user inlet end of the heat user unit, a water separator is arranged at the user outlet end, one of the outlet ends of the water separator is connected to the heat exchange inlet end of the high-temperature plate type heat exchanger, one of the outlet ends of the heat pump units is connected to the inlet end of the water collector in a converging manner, and supplies heat to the heat user unit, the other branch is connected to the inlet end of the energy storage device and stores energy for the energy storage unit, the outlet end of the energy storage unit energy storage device is connected to the inlet end of the high-temperature plate heat exchanger, the other branch is connected to the inlet end of the heat pump unit and supplies energy for the direct heating unit and the heat pump warming unit when the heat pump unit does not supply heat, the other branch is connected with the inlet of the water collector and returns to the energy storage device through the branch of the water separator to form an energy release heating loop of the energy storage device, and the energy release heating loop supplies heat for the heat user unit when the direct heating unit and the heat pump warming unit do not work.
A low-temperature plate type heat exchanger 11 is arranged on one side of the heat pump unit, the interlayer outlet end of the high-temperature plate type heat exchanger is connected to the interlayer inlet end of the low-temperature plate type heat exchanger, and the interlayer outlet end of the low-temperature plate type heat exchanger is connected to a recharging well 10 in a backflow mode.
The energy storage device is a horizontal energy storage water tank, a heat supply pump 2 is arranged between the energy storage device and the water collector, and a heat supply pump 5 is arranged between the energy storage device and the heat pump unit.
A heat supply pump 5 is arranged between the outlet end of the water separator and the inlet end of the heat pump unit.
A circulating water pump 9 is arranged between the low-temperature plate heat exchanger and the heat pump unit.
A water suction pump 13 is arranged between the outlet end of the hot water well and the high-temperature plate heat exchanger.
The application of the low-cost operation geothermal heating-energy storage integrated system comprises a heating stage, an energy storage stage and an energy release stage.
As shown in fig. 2, during the heating phase, valves V1, V3, V4, V5, V7, V8, and V9 are opened, and valves V2, V6, V10, and V11 are closed.
Meanwhile, high-temperature geothermal water flows through the high-temperature plate heat exchanger after being pumped out from the outlet of the geothermal well, and heat is transferred to the low-temperature plate heat exchanger after being supplied with hot water. And hot water is heated in the high-temperature plate heat exchanger, flows through the water collector according to the adjustment of the electric valve, is conveyed to a user for heating through the pump, flows to the water separator and returns to the high-temperature plate heat exchanger to complete circulation.
Meanwhile, geothermal water which is discharged by the high-temperature plate heat exchanger flows through the low-temperature plate heat exchanger to transfer heat to circulating water, and then is conveyed back to the inlet of the geothermal well to finish recharging.
The heat pump unit comprises a condenser 6 and an evaporator 8, circulating water absorbs heat in the low-temperature plate heat exchanger and flows to the heat pump system evaporator, heat is transferred to working media of the heat pump system, the working media are evaporated after absorbing heat, enter the heat pump system condenser to release heat after being compressed by the working media pump, and then enter the secondary evaporator after being throttled by the throttle valve to complete circulation. The heating water absorbs heat in a condenser of the heat pump system, flows to a water collector, is conveyed to a user by a pump for heating, flows to a water separator and then flows to the condenser of the heat pump system to complete circulation.
As shown in fig. 3, during the energy storage phase, valves V4, V6, V7, V8, V9, V10 are open, and valves V1, V2, V3, V5, V11 are closed.
Meanwhile, when a user does not have a heating demand, the heating water absorbed by the high-temperature plate heat exchanger stores energy for the energy storage device. Meanwhile, the hot water absorbed in the heat pump condenser is supplied to the energy storage device for storing energy.
As shown in fig. 4, during the energy release phase, valves V1, V2, V11 are open, valves V3, V4, V5, V6, V7, V8, V9, V10 are closed.
Meanwhile, when a user has a heat demand, the energy storage device conveys heating water to the water collector, then the heating water is conveyed to the user by the pump, then the heating water is conveyed to the water separator, and finally the heating water returns to the energy storage device to complete circulation.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (9)
1. A geothermal heating-energy storage integrated system with low cost operation is characterized in that: the system comprises a geothermal direct heating unit, a heat pump heating unit, an energy storage unit and a heat user unit, wherein the direct heating unit and the heat pump heating unit heat the heat user unit together through a water collector and simultaneously store energy for the energy storage unit, and circulating water from the heat user unit is respectively connected to the geothermal direct heating unit and the heat pump heating unit through a water separator for circulating heating; the outlet end of the energy storage unit is connected with the geothermal direct heating unit and the heat pump heating unit, and supplies energy to the direct heating unit and the heat pump heating unit when the direct heating unit and the heat pump heating unit do not supply heat; the energy storage unit is also provided with an energy releasing and heating loop which is connected with the inlet of the water collector and forms an energy storage unit through a backflow of one branch of the water separator, and the energy releasing and heating loop supplies heat for the heat user unit when the direct heating unit and the heat pump heating unit do not work.
2. A geothermal heating-energy storage integrated system with low cost operation is characterized in that: the direct heating unit comprises a hot water well, the outlet end of the hot water well is connected with the interlayer inlet end of a high-temperature plate type heat exchanger, one heat exchange outlet end of the high-temperature plate type heat exchanger is connected with the inlet end of a water collector, the other heat exchange outlet end of the high-temperature plate type heat exchanger is connected with the inlet end of an energy storage device of an energy storage unit, the outlet end of the water collector is connected with the user inlet end of a heat user unit, a water separator is arranged at the user outlet end, one outlet end of the water separator is connected with the heat exchange inlet end of the high-temperature plate type heat exchanger, one outlet end of the heat pump unit is connected with the inlet end of a heat pump unit of a heat pump heating unit, one outlet end of the heat pump unit is converged with the heat exchange outlet end of the high-temperature plate type heat exchanger and is connected with the inlet end of the energy storage device, so as to store energy for the energy of the energy storage unit, one outlet end of the energy storage device of the energy storage unit is connected with the inlet end of the high-temperature plate type heat exchanger, and the other outlet end of the energy storage unit is connected with the heat pump unit, the energy storage unit is also provided with an energy releasing and heating loop which is connected with the inlet of the water collector and flows back to the energy storage device through one branch of the water distributor to form the energy storage device.
3. A low cost geothermal heating-energy storage integrated system as defined in claim 2 wherein: and a low-temperature plate type heat exchanger is arranged on one side of the heat pump unit, the interlayer outlet end of the high-temperature plate type heat exchanger is connected to the interlayer inlet end of the low-temperature plate type heat exchanger, and the interlayer outlet end of the low-temperature plate type heat exchanger is connected to the recharging well in a backflow mode.
4. A low cost geothermal heating-energy storage integrated system as defined in claim 2 wherein: the energy storage device is a horizontal energy storage water tank, a heat supply pump is arranged between the energy storage device and the water collector, and the heat supply pump is arranged between the energy storage device and the heat pump unit.
5. A low cost geothermal heating-energy storage integrated system as defined in claim 2 wherein: a heat supply pump is arranged between the outlet end of the water separator and the inlet end of the heat pump unit, a circulating water pump is arranged between the low-temperature plate heat exchanger and the heat pump unit, and a water suction pump is arranged between the outlet end of the hot water well and the high-temperature plate heat exchanger.
6. The application of a geothermal heating-energy storage integrated system which runs at low cost is characterized in that: including in the heating phase, the energy storage phase and in the energy release phase.
7. Use of a low-cost operation geothermal heating-energy storage integrated system according to claim 6, wherein: in the heating stage, valves V1, V3, V4, V5, V7, V8 and V9 are opened, valves V2, V6, V10 and V11 are closed, high-temperature geothermal water is pumped out from an outlet of a geothermal well, flows through a high-temperature plate heat exchanger, transfers heat to hot water and then flows to a low-temperature plate heat exchanger, the hot water is adjusted by an electric valve and then flows through a water collector after absorbing heat in the high-temperature plate heat exchanger, then is conveyed to a user for heating through a pump, then flows to a water separator and returns to the high-temperature plate heat exchanger to complete circulation, geothermal water which is subjected to heat release after flowing through the high-temperature plate heat exchanger transfers heat to circulating water through the low-temperature plate heat exchanger, then is conveyed back to a geothermal well inlet to complete recharging, the circulating water flows to an evaporator of a heat pump system after absorbing heat in the low-temperature plate heat exchanger, transfers heat to working media of the heat pump system, the working media are evaporated after absorbing heat and then enter a condenser of the heat pump system to release heat, and then the heating water enters the secondary evaporator after being throttled by the throttle valve to complete circulation, the heating water absorbs heat in a condenser of the heat pump system and then flows to a water collector, then is conveyed to a user by a pump for heating, and then flows to a water separator and then flows to the condenser of the heat pump system to complete circulation.
8. Use of a low-cost operation geothermal heating-energy storage integrated system according to claim 6, wherein: in the energy storage stage, valves V4, V6, V7, V8, V9 and V10 are opened, valves V1, V2, V3, V5 and V11 are closed, when a user does not need heating, the heating water absorbing heat in the high-temperature plate heat exchanger stores energy in the energy storage device, and the heating water absorbing heat in the heat pump condenser stores energy in the energy storage device.
9. Use of a low-cost operation geothermal heating-energy storage integrated system according to claim 6, wherein: in the energy release stage, valves V1, V2 and V11 are opened, valves V3, V4, V5, V6, V7, V8, V9 and V10 are closed, when a user has a heat demand, the energy storage device conveys heating water to the water collector, then the heating water is conveyed to the user by the pump, then the heating water is conveyed to the water separator, and finally the heating water returns to the energy storage device to complete circulation.
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| CN114087642A (en) * | 2021-11-19 | 2022-02-25 | 西安交通大学 | Medium-deep geothermal energy coupling energy storage device heating system based on demand response |
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