CN114739050A - Soil heat supplementing assembly based on ground source heat system, ground source heat system and control method - Google Patents
Soil heat supplementing assembly based on ground source heat system, ground source heat system and control method Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 143
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 159
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 239000013589 supplement Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- F24D3/18—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
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
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- 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
- F28D20/0052—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using the ground body or aquifers as heat storage medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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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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- Chemical & Material Sciences (AREA)
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- Sustainable Energy (AREA)
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Abstract
The invention discloses a soil heat supplementing assembly based on a ground source heat system, the ground source heat system and a control method, relates to the field of air conditioning systems, and solves the technical problem that a ground source heat pump system in the prior art is prone to causing unbalanced cold and heat of soil after long-term operation. The soil heat supplementing assembly comprises a heating device, a heat exchange device and a power device, wherein the heating device, the heat exchange device, the power device and the heating device are sequentially connected to form a medium circulation loop; the heat exchange device is buried in the soil, and the heat exchange device provides heat for the soil by using the heated medium; the power device is used for providing power for the flow of the medium. The soil heat supplementing assembly can utilize outdoor heat to heat the medium, and then the heated medium exchanges heat with the soil, so that the heat of the soil is supplemented in summer to maintain the cold and heat balance of the soil, and a ground source heat system can operate stably and efficiently for a long time.
Description
Technical Field
The invention relates to the technical field of air conditioning systems, in particular to a ground source heat system-based soil concurrent heating component, a ground source heat system and a control method.
Background
The ground source heat pump is a heating ventilation air conditioning technology of renewable energy, the temperature of soil 2 meters below the ground surface is basically not affected by seasons, and the stable temperature (14-16 ℃) can be maintained in certain regions, so that a large amount of available energy exists in the ground. The ground source heat pump system utilizes the characteristic that the underground normal temperature soil is relatively stable, and adopts the heat pump principle to realize the technology of finishing heat exchange with a user side through a pipeline system or underground water deeply buried around a building and a small amount of electric energy input. The ground source heat pump air conditioner is mainly divided into three parts: the system comprises an outdoor geothermal energy heat exchange system, a water source heat pump unit system and an indoor heating air-conditioning terminal system, wherein heat is transferred among the three systems by water or air heat exchange media, the heat exchange media between the water source heat pump and geothermal energy are water, and the heat exchange media with building heating air-conditioning terminal equipment can be water or air.
The traditional ground source heat pump system is provided with a heat pump unit to perform cooling in summer and heating in winter, specifically, the water source heat pump unit converts the energy of soil into energy for the tail end, and then the indoor tail end system supplies cooling or heating for the user end. In summer, the ground source heat pump system utilizes the cold quantity extracted from the soil and converts the cold quantity into cold quantity for supplying cold to users through the unit compressor, in winter, the ground source heat pump system extracts heat from the soil and supplies heat to the users through the unit, and the water pump supplies system power to form circulation.
However, the applicant has found that the conventional ground source heat pump system has at least the following disadvantages: (1) the traditional ground source heat pump system is provided with a heat pump unit, and the energy consumption of the heat pump unit in the ground source heat pump system is large, so that the energy consumption of the traditional ground source heat pump system can not be reduced to the minimum; (2) the traditional ground source heat pump system is mainly used for providing heat and cold for a user side, heat is taken from soil as long as insufficient heat supply occurs, and after the ground source heat pump system operates for a long time, the cold and hot imbalance of the soil is easily caused, so that the long-term stable operation of the ground source heat pump system is influenced. Therefore, it is urgently needed to provide a soil heat supplementing assembly based on a ground source heat system, so that the soil can obtain heat supplement, and the heat of the soil can be balanced.
Disclosure of Invention
One of the purposes of the present invention is to provide a soil heat supplementing assembly based on a ground source heat system, which solves the technical problem that a ground source heat pump system in the prior art is prone to cause cold and heat imbalance of soil after long-term operation. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to realize the purpose, the invention provides the following technical scheme:
the soil heat supplementing assembly based on the ground source heat system comprises a heating device, a heat exchange device and a power device, wherein the heating device, the heat exchange device, the power device and the heating device are sequentially connected to form a medium circulation loop, and the heating device heats a medium flowing into the heating device by utilizing outdoor heat; the heat exchange device is buried in soil, and provides heat for the soil by using the heated medium; the power device is used for providing power for the flow of the medium.
According to a preferred embodiment, the soil concurrent heating assembly based on the ground source heat system further comprises a metering device, the metering device is arranged at the inlet of the heat exchange device and the outlet of the heat exchange device, and the metering device is used for metering heat input into the soil and heat extracted from the soil.
According to a preferred embodiment, the metering device comprises a first temperature sensor, a second temperature sensor and a flow meter, wherein the first temperature sensor is arranged at the inlet of the heat exchange device and the second temperature sensor and the flow meter are arranged at the outlet of the heat exchange device.
According to a preferred embodiment, the heat input to the soil is: q1＝C*G*(T1-T2) The heat extracted from the soil is: q2＝C*G*(T2-T1) Wherein Q is1For input of heat into the soil, Q2For the heat extracted from the soil, C is the specific heat capacity of the medium, G is the medium flow measured by the flowmeter, T1Is the medium temperature, T, measured by the first temperature sensor2Is the medium temperature measured by the second temperature sensor.
According to a preferred embodiment, the soil concurrent heating assembly based on the ground source heat system further comprises a controller, the controller is connected with the power device and the metering device, and is used for storing the heat extracted from the soil, and the controller is also used for controlling the heat input into the soil by controlling the working state of the power device and enabling the heat input into the soil to be equivalent to the heat extracted from the soil.
According to a preferred embodiment, the soil heat supplementing assembly based on the ground source heat system comprises a plurality of heat supplementing units, the plurality of heat supplementing units are arranged in parallel, the heat supplementing units comprise medium circulation loops formed by sequentially connecting the heating device, the heat exchange device, the power device and the heating device, and the heat supplementing units further comprise the metering device and the controller.
The soil heat-supplementing component based on the ground source heat system has at least the following beneficial technical effects:
the invention relates to a soil heat supplementing assembly based on a ground source heat system, which comprises a heating device, a heat exchange device and a power device, wherein the heating device, the heat exchange device, the power device and the heating device are sequentially connected to form a medium circulation loop, and the heating device heats a medium flowing into the heating device by utilizing outdoor heat; the soil heat supplementing assembly based on the ground source heat system can utilize outdoor heat to heat the medium, and then the heated medium exchanges heat with the soil, so that the heat of the soil is supplemented in summer to maintain the cold-heat balance of the soil, and the ground source heat system can operate stably and efficiently for a long time. The soil heat supplementing assembly based on the ground source heat system solves the technical problem that the ground source heat pump system in the prior art is easy to cause cold and hot unbalance of soil after long-term operation.
In addition, the preferable technical scheme of the invention also has the following beneficial technical effects:
the soil heat-supplementing assembly based on the ground source heat system in the preferred technical scheme of the invention further comprises a metering device, wherein the metering device is arranged at an inlet of the heat exchange device and an outlet of the heat exchange device, and is used for metering heat input into soil and heat extracted from the soil.
A second object of the invention is to propose a ground source thermal system.
The ground source heat system comprises a heat supplementing assembly, terminal equipment and a control valve assembly, wherein the heat supplementing assembly is the soil heat supplementing assembly based on the ground source heat system in any technical scheme of the invention, the terminal equipment is arranged between an outlet of a power device and an inlet of a heat exchange device, and the terminal equipment is used for exchanging heat with a user side; the control valve assemblies are arranged at two ends of the heating device and two ends of the terminal equipment, and are used for controlling the circulation direction of the medium and enabling the ground source heat system to be in a heat supplementing mode or a heating mode.
According to a preferred embodiment, when the ground source heat system is in a heat supplementing mode, the heating device and the power device are in an open state, the terminal equipment is in a closed state, and the control valve assembly is used for controlling the heating device, the heat exchanging device, the power device and the heating device to be connected in sequence and form a heat supplementing loop; when the ground source heat system is in a heating mode, the end equipment and the power device are in an open state, the heating device is in a closed state, and the control valve assembly is used for controlling the heat exchange device, the power device, the end equipment and the heat exchange device to be sequentially connected to form a heating loop.
According to a preferred embodiment, the control valve assembly comprises a first control valve, a second control valve, a third control valve and a fourth control valve, wherein the first control valve is arranged at the inlet of the heating device and the second control valve is arranged between the inlet of the first control valve and the outlet of the heating device; the third control valve is arranged between the outlet of the power plant and the outlet of the end equipment, the fourth control valve is arranged between the outlet of the power plant and the inlet of the end equipment, and the first control valve, the second control valve, the third control valve and the fourth control valve are in an open state or a closed state based on the operation mode of the ground source heat system.
According to a preferred embodiment, when the first control valve is in an open state, the second control valve is in a closed state, the third control valve is in an open state, and the fourth control valve is in a closed state, the heating device, the heat exchanging device, the power device and the heating device are sequentially connected to form a heat supplementing loop, so that the ground source heating system is in a heat supplementing mode; when the first control valve is in a closed state, the second control valve is in an open state, the third control valve is in a closed state, and the fourth control valve is in an open state, the heat exchange device, the power device, the terminal equipment and the heat exchange device are sequentially connected to form a heating loop, so that the ground source heating system is in a heating mode.
The ground source heat system provided by the invention at least has the following beneficial technical effects:
the ground source heat system has a heat supplementing mode or a heating mode, underground heat can be directly extracted to supply heat for a user side in winter, and the soil heat supplementing assembly of any technical scheme can be used for supplementing heat for soil in summer, so that the cold and heat balance of the soil is maintained, and the ground source heat system can stably and efficiently run for a long time; on the other hand, when the ground source heat system is in a heating mode, underground heat is directly extracted to supply heat for the user side, and when the ground source heat system is in a heat supplementing mode, outdoor heat is used for supplementing heat for soil, namely, a heat pump unit is omitted, and compared with a traditional ground source heat pump system, the ground source heat system is more energy-saving.
The third purpose of the invention is to provide a control method of the ground source heat system.
The control method of the ground source heat system according to any one technical scheme of the invention comprises the following steps: judging the current season; and controlling the opening states of the first control valve, the second control valve, the third control valve and the fourth control valve based on the current season, controlling the opening states of the heating device, the power device and the terminal equipment based on the current season, and enabling the ground source heat system to operate in a heat supplementing mode or a heating mode.
According to a preferred embodiment, when the current season is summer, the first control valve is controlled to be in an open state, the second control valve is controlled to be in a closed state, the third control valve is controlled to be in an open state, the fourth control valve is controlled to be in a closed state, the heating device and the power device are controlled to be in an open state, the terminal equipment is controlled to be in a closed state, and the heating device, the heat exchange device, the power device and the heating device are sequentially connected to form a heat supplementing loop; when the current season is winter, the first control valve is controlled to be in a closed state, the second control valve is controlled to be in an open state, the third control valve is controlled to be in a closed state, the fourth control valve is controlled to be in an open state, the terminal equipment and the power device are controlled to be in an open state, the heating device is controlled to be in a closed state, and the heat exchange device, the power device, the terminal equipment and the heat exchange device are sequentially connected to form a heating loop.
The control method of the ground source heat system provided by the invention at least has the following beneficial technical effects:
the control method of the ground source heat system controls the opening states of the first control valve, the second control valve, the third control valve and the fourth control valve based on the current season, and controls the opening states of the heating device, the power device and the terminal equipment based on the current season, and enables the ground source heat system to form a heat supplementing loop or a heating loop, so that the ground source heat system can realize the functions of heating in winter and heat supplementing in summer to maintain the cold-heat balance of soil, and the ground source heat system can operate stably and efficiently for a long time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a preferred embodiment of a ground source heat system of the present invention;
fig. 2 is a flow chart of a control method of the ground source heat system of the present invention.
In the figure: 11. a heating device; 12. a heat exchange device; 13. a power plant; 14. a first temperature sensor; 15. a second temperature sensor; 16. a flow meter; 17. a terminal device; 181. a first control valve; 182. a second control valve; 183. a third control valve; 184. and a fourth control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present invention.
The soil heat supplementing assembly based on the ground source heat system, the ground source heat system and the control method of the invention are described in detail below with reference to the attached drawings 1 and 2 of the specification and the embodiments 1 to 3.
Example 1
The present embodiment describes the soil heat-supplementing assembly based on a ground source heat system in detail.
This embodiment is based on soil concurrent heating subassembly of ground source thermal system, including heating device 11, heat transfer device 12 and power device 13, heating device 11, heat transfer device 12, power device 13 and heating device 11 connect gradually and form the medium circulation circuit, as shown in fig. 1. Preferably, the heating device 11 heats the medium flowing into the heating device 11 by using outdoor heat; the heat exchange device 12 is buried in the soil, and the heat exchange device 12 provides heat for the soil by using the heated medium; the power device 13 is used for providing power for the flow of the medium. More preferably, the heating device 11 is a water storage tower, the heat exchange device 12 is a buried pipe, the power device 13 is a water pump, and the medium is water. More preferably, since the outdoor temperature in summer is high, the heating device 11 can heat the medium flowing into the heating device 11 by using the outdoor heat in summer, thereby improving the heating efficiency and saving energy.
Specifically, the soil concurrent heating subassembly of this embodiment is the soil concurrent heating through following mode: the heating device 11, the heat exchange device 12, the power device 13 and the heating device 11 of the embodiment are sequentially connected to form a medium circulation loop, and when a medium flows through the heating device 11, the medium can be heated by using outdoor heat in summer, so that the temperature of the medium is increased; the heated medium flows to the heat exchange device 12 again, so that the heated medium can exchange heat with soil to provide heat for the soil; the temperature of the medium after heat exchange with the soil is reduced, the medium flows to the heating device 11 again for heating, the power device 13 provides power for the flowing of the medium in the whole loop, and the circulation can realize the continuous utilization of outdoor heat for soil heat supplement. Therefore, the soil heat supplementing assembly based on the ground source heat system can utilize outdoor heat to heat the medium, and then the heated medium exchanges heat with the soil, so that the heat of the soil is supplemented in summer to maintain the cold and heat balance of the soil, and the ground source heat system can operate stably and efficiently for a long time. The soil concurrent heating subassembly based on ground source heat system of this embodiment promptly has solved the long-term back of operating of ground source heat pump system among the prior art, very easily causes the cold and hot unbalanced technical problem of soil.
According to a preferred embodiment, the soil concurrent heating assembly based on the ground source heat system further comprises a metering device, the metering device is arranged at the inlet of the heat exchange device 12 and the outlet of the heat exchange device 12, and the metering device is used for metering the heat input into the soil and the heat extracted from the soil. The soil heat supplement component based on the ground source heat system in the preferred technical scheme of the embodiment can accurately measure the heat extracted from the soil in winter through the effect of the measuring device, and then can supplement corresponding heat for the soil in summer according to the heat extracted in winter, so that the heat extracted in winter and the heat supplemented in summer are balanced to maintain the cold-heat balance of the soil.
According to a preferred embodiment, the metering device comprises a first temperature sensor 14, a second temperature sensor 15 and a flow meter 16, wherein the first temperature sensor 14 is arranged at the inlet of the heat exchange device 12 and the second temperature sensor 15 and the flow meter 16 are arranged at the outlet of the heat exchange device 12, as shown in fig. 1. Preferably, the heat input into the soil is: q1＝C*G*(T1-T2) The heat extracted from the soil is: q2＝C*G*(T2-T1) Wherein, Q1For input of heat into the soil, Q2For heat extracted from the soil, C is the specific heat capacity of the medium, G is the medium flow measured by the flow meter 16, T1Is the medium temperature, T, measured by the first temperature sensor 142Is the medium temperature measured by the second temperature sensor 15. The metering device of the preferred technical scheme of the embodiment is used for measuring the temperature difference and the flow rate of the medium entering and exiting the heat exchange device 12, and then the heat input into the soil or the heat extracted from the soil can be obtained. The metering device of the preferred technical scheme of this embodiment has simple to operate and the advantage that the reliability is high.
According to a preferred embodiment, the soil concurrent heating assembly based on the ground source heat system further comprises a controller, the controller is connected with the power device 13 and the metering device, and the controller is used for storing the heat extracted from the soil, and the controller is also used for controlling the heat input into the soil by controlling the working state of the power device 13 and enabling the heat input into the soil to be equivalent to the heat extracted from the soil. Preferably, when the amount of heat input into the soil is less than the amount of heat extracted from the soil, the controller controls the power device 13 to be in an on state, so that the soil heat-supplementing assembly continues to supplement heat to the soil; when the amount of heat input to the soil is comparable to the amount of heat extracted from the soil, the controller controls the power unit 13 to be in the off state so as to stop the soil heating assembly from supplying heat to the soil. In the preferred technical solution of this embodiment, the term that the heat quantity input into the soil is equivalent to the heat quantity extracted from the soil, may mean that the heat quantity input into the soil is equal to the heat quantity extracted from the soil, or may mean that the difference between the heat quantity input into the soil and the heat quantity extracted from the soil is within a preset range, for example, the difference between the heat quantity input into the soil and the heat quantity extracted from the soil is not more than 1% of the heat quantity extracted from the soil. The controller is, for example, a single chip microcomputer. The heat of input soil is controlled through the controller to the preferred technical scheme of this embodiment, can promote the intelligent degree of soil concurrent heating subassembly.
According to a preferred embodiment, the soil heat supplementing assembly based on the ground source heat system comprises a plurality of heat supplementing units, the plurality of heat supplementing units are arranged in parallel, the heat supplementing units comprise medium circulation loops formed by sequentially connecting a heating device 11, a heat exchange device 12, a power device 13 and the heating device 11, and the heat supplementing units further comprise a metering device and a controller. Only one supplementary heating unit is shown in fig. 1. Specifically, the number of the concurrent heating units may be determined based on the range of the soil to be supplemented with heat. The soil concurrent heating subassembly of the preferred technical scheme based on ground source thermal system of this embodiment includes a plurality of concurrent heating units, is the soil concurrent heating through a plurality of concurrent heating units, can promote concurrent heating efficiency.
Example 2
This example illustrates the ground source heat system of the present invention in detail.
The ground source thermal system of the present embodiment includes an auxiliary heating assembly, a terminal equipment 17 and a control valve assembly, as shown in fig. 1. Preferably, the heat supplementing assembly is the soil heat supplementing assembly based on the ground source heat system in any one of the technical solutions in embodiment 1, the end device 17 is disposed between the outlet of the power plant 13 and the inlet of the heat exchanging device 12, and the end device 17 is used for exchanging heat with the user terminal; the control valve assemblies are disposed at two ends of the heating device 11 and two ends of the end equipment 17, and are used for controlling the flowing direction of the medium and enabling the ground source heating system to be in a heat compensation mode or a heating mode, as shown in fig. 1. The structure of the end device 17 may be the same as the prior art and will not be described in detail herein. More preferably, the end device 17 is arranged between the outlet of the power means 13 and the inlet of the heating means 11, as shown in fig. 1. Without being limited thereto, the end device 17 may also be arranged between the outlet of the heating means 11 and the inlet of the heat exchange means 12. More preferably, the temperature is higher in summer, and the ground source heat system is in a heat supplementing mode; the ground source heat system is in a heating mode in winter, so that heating for the user side can be realized by utilizing ground source heat.
The ground source heat system of the embodiment has a heat supplementing mode or a heating mode, in winter, underground heat can be directly extracted to supply heat for a user side, and in summer, the soil heat supplementing assembly of any one of the technical schemes in the embodiment 1 can be used for supplementing heat for soil, so that the cold and heat balance of the soil is maintained, and the ground source heat system can be operated stably and efficiently for a long time; on the other hand, when the ground source heat system of this embodiment is in the heating mode, directly extract the underground heat and supply heat for the user, when being in the concurrent heating mode, utilize outdoor heat to supply heat for soil, the ground source heat system of this embodiment has cancelled heat pump set promptly, compares in traditional ground source heat pump system, and the ground source heat system of this embodiment is more energy-conserving.
According to a preferred embodiment, when the ground source heat system is in the heat supplementing mode, the heating device 11 and the power device 13 are in an open state, the end equipment 17 is in a closed state, and the control valve assembly is used for controlling the heating device 11, the heat exchanging device 12, the power device 13 and the heating device 11 to be connected in sequence and form a heat supplementing loop; when the ground source heat system is in a heating mode, the end equipment 17 and the power device 13 are in an open state, the heating device 11 is in a closed state, and the control valve assembly is used for controlling the heat exchange device 12, the power device 13, the end equipment 17 and the heat exchange device 12 to be sequentially connected to form a heating loop, as shown in fig. 1.
Specifically, when the ground source thermal system is in the heat compensation mode, the end equipment 17 does not work, the heating device 11 and the power device 13 work, and when the medium flows through the heating device 11, the medium can be heated by using outdoor heat, so that the temperature of the medium is increased; the heated medium flows to the heat exchange device 12 again, so that the heated medium can exchange heat with soil to provide heat for the soil; the temperature of the medium after heat exchange with the soil is reduced, and the medium flows to the heating device 11 again for heating, and the circulation is performed, so that the purpose of continuously utilizing outdoor heat to supplement heat for the soil can be realized, as shown in fig. 1. When the ground source heat system is in a heating mode, the heating device 11 does not work, the terminal equipment 17 and the power device 13 work, and when a medium flows through the heat exchange device 12, the medium can exchange heat with soil, so that the temperature of the medium is increased; the medium with the increased temperature flows to the end equipment 17 for heat exchange for the user side, so that heat is provided for the user side; the temperature of the medium after heat exchange with the user end is reduced, and the medium flows to the heat exchange device 12 again to exchange heat with soil, and the circulation is performed, so that heat can be continuously provided for the user end, as shown in fig. 1.
According to a preferred embodiment, the control valve assembly comprises a first control valve 181, a second control valve 182, a third control valve 183 and a fourth control valve 184, wherein the first control valve 181 is arranged at the inlet of the heating device 11 and the second control valve 182 is arranged between the inlet of the first control valve 181 and the outlet of the heating device 11; the third control valve 183 is disposed between the outlet of the power plant 13 and the outlet of the end equipment 17, and the fourth control valve 184 is disposed between the outlet of the power plant 13 and the inlet of the end equipment 17, and the first control valve 181, the second control valve 182, the third control valve 183, and the fourth control valve 184 are in an open state or a closed state, as shown in fig. 1, depending on the operation mode of the ground source heat system. In the preferred technical scheme of this embodiment, the states of the first control valve 181, the second control valve 182, the third control valve 183 and the fourth control valve 184 are controlled to make the ground source heat system in the heat compensation mode or the heating mode, so that the ground source heat system can operate in different modes in different seasons to realize two functions of heat compensation and heating.
According to a preferred embodiment, when the first control valve 181 is in the open state, the second control valve 182 is in the closed state, the third control valve 183 is in the open state, and the fourth control valve 184 is in the closed state, the heating device 11, the heat exchanging device 12, the power device 13, and the heating device 11 are sequentially connected to form a heat supplementing loop, so that the ground source heating system is in the heat supplementing mode. Preferably, when the first control valve 181 is in a closed state, the second control valve 182 is in an open state, the third control valve 183 is in a closed state, and the fourth control valve 184 is in an open state, the heat exchanger 12, the power device 13, the end equipment 17, and the heat exchanger 12 are sequentially connected to form a heating loop, so that the ground source heating system is in a heating mode. In the preferred technical scheme of this embodiment, the first control valve 181, the second control valve 182, the third control valve 183 and the fourth control valve 184 are controlled to be opened to operate the ground source heat system in the heat supplementing mode or the heating mode, so that the system has the advantages of simple structure, convenience in installation and high reliability.
Example 3
This embodiment describes the control method of the ground source heat system in detail.
The method for controlling a ground source heat system according to any one of the technical solutions in the embodiment 2 includes the following steps: judging the current season; and controlling the opening states of the first control valve 181, the second control valve 182, the third control valve 183 and the fourth control valve 184 based on the current season, controlling the opening states of the heating device 11, the power device 13 and the end equipment 17 based on the current season, and operating the ground source heat system in a heat supplementing mode or a heating mode. Preferably, the season can be judged according to parameters such as temperature and time.
Preferably, when the current season is summer, the first control valve 181 is controlled to be in an open state, the second control valve 182 is controlled to be in a closed state, the third control valve 183 is controlled to be in an open state, the fourth control valve 184 is controlled to be in a closed state, the heating device 11 and the power device 13 are controlled to be in an open state, the end equipment 17 is controlled to be in a closed state, and the heating device 11, the heat exchange device 12, the power device 13 and the heating device 11 are sequentially connected to form a heat supplementing loop, as shown in fig. 1 and fig. 2.
Preferably, when the current season is in winter, the first control valve 181 is controlled to be in a closed state, the second control valve 182 is controlled to be in an open state, the third control valve 183 is controlled to be in a closed state, the fourth control valve 184 is controlled to be in an open state, the end equipment 17 and the power device 13 are controlled to be in an open state, the heating device 11 is controlled to be in a closed state, and the heat exchange device 12, the power device 13, the end equipment 17 and the heat exchange device 12 are sequentially connected to form a heating loop, as shown in fig. 1 and fig. 2.
In the control method of the ground source heat system of this embodiment, the opening states of the first control valve 181, the second control valve 182, the third control valve 183, and the fourth control valve 184 are controlled based on the current season, and the opening states of the heating device 11, the power device 13, and the end device 17 are controlled based on the current season, so that the ground source heat system forms a heat compensation loop or a heating loop, and thus the ground source heat system can achieve the functions of heating in winter and heat compensation in summer to maintain the cold-heat balance of the soil, so that the ground source heat system can operate stably and efficiently for a long time.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (12)
1. A soil heat supplementing assembly based on a ground source heat system is characterized by comprising a heating device (11), a heat exchange device (12) and a power device (13), wherein the heating device (11), the heat exchange device (12), the power device (13) and the heating device (11) are sequentially connected to form a medium circulation loop, and the heating device (11) heats a medium flowing into the heating device (11) by utilizing outdoor heat; the heat exchange device (12) is buried in soil, and the heat exchange device (12) provides heat for the soil by using the heated medium; the power device (13) is used for providing power for the flow of the medium.
2. A ground source heat system based soil concurrent heating assembly as claimed in claim 1, further comprising a metering device disposed at an inlet of said heat exchanging device (12) and an outlet of said heat exchanging device (12) and for metering heat input to and extracted from the soil.
3. Ground source heat system based soil concurrent heating assembly according to claim 2, wherein the metering device comprises a first temperature sensor (14), a second temperature sensor (15) and a flow meter (16), wherein the first temperature sensor (14) is arranged at the inlet of the heat exchanging device (12) and the second temperature sensor (15) and the flow meter (16) are arranged at the outlet of the heat exchanging device (12).
4. A ground source heat system based soil concurrent heating assembly as claimed in claim 3, wherein the heat input into the soil is: q1＝C*G*(T1-T2) The heat extracted from the soil is: q2＝C*G*(T2-T1) Wherein Q is1For input of heat into the soil, Q2C is the specific heat capacity of the medium, G is the medium flow measured by the flowmeter (16), T1The temperature T of the medium measured by the first temperature sensor (14)2Is the medium temperature measured by the second temperature sensor (15).
5. A ground source heat system based soil concurrent heating assembly as claimed in claim 2, further comprising a controller connected to said power unit (13) and said metering device and adapted to store heat extracted from the soil, said controller further controlling the amount of heat input to the soil by controlling the operating state of said power unit (13) to correspond to the amount of heat extracted from the soil.
6. The ground source heat system-based soil heat supplementing assembly according to claim 5, comprising a plurality of heat supplementing units, wherein the plurality of heat supplementing units are arranged in parallel, the heat supplementing units comprise medium circulation loops formed by sequentially connecting the heating device (11), the heat exchanging device (12), the power device (13) and the heating device (11), and the heat supplementing units further comprise the metering device and the controller.
7. A ground source heat system, characterized by comprising an auxiliary heat assembly, a terminal equipment (17) and a control valve assembly, wherein the auxiliary heat assembly is the ground source heat system-based soil auxiliary heat assembly of any one of claims 1 to 6, the terminal equipment (17) is arranged between the outlet of the power device (13) and the inlet of the heat exchange device (12), and the terminal equipment (17) is used for exchanging heat with a user terminal; the control valve assemblies are arranged at two ends of the heating device (11) and two ends of the terminal equipment (17), and are used for controlling the circulation direction of the medium and enabling the ground source heat system to be in a heat supplementing mode or a heating mode.
8. A ground source heat system according to claim 7, characterized in that when the ground source heat system is in a heat supplementing mode, the heating device (11) and the power device (13) are in an open state, the end equipment (17) is in a closed state, and the control valve assembly is used for controlling the heating device (11), the heat exchanging device (12), the power device (13) and the heating device (11) to be connected in sequence and form a heat supplementing loop;
when the ground source heat system is in a heating mode, the end equipment (17) and the power device (13) are in an open state, the heating device (11) is in a closed state, and the control valve assembly is used for controlling the heat exchange device (12), the power device (13), the end equipment (17) and the heat exchange device (12) to be sequentially connected to form a heating loop.
9. A ground source heat system according to claim 7 or 8, characterized in that said control valve assembly comprises a first control valve (181), a second control valve (182), a third control valve (183) and a fourth control valve (184), wherein said first control valve (181) is arranged at the inlet of said heating device (11) and said second control valve (182) is arranged between the inlet of said first control valve (181) and the outlet of said heating device (11); the third control valve (183) is arranged between the outlet of the power plant (13) and the outlet of the end equipment (17), the fourth control valve (184) is arranged between the outlet of the power plant (13) and the inlet of the end equipment (17), and the first control valve (181), the second control valve (182), the third control valve (183) and the fourth control valve (184) are in an open state or a closed state based on the operation mode of the ground source heat system.
10. A ground source heat system according to claim 9, characterized in that when the first control valve (181) is in an open state, the second control valve (182) is in a closed state, the third control valve (183) is in an open state, and the fourth control valve (184) is in a closed state, the heating device (11), the heat exchanging device (12), the power device (13), and the heating device (11) are connected in sequence and form a heat supplementing loop, so that the ground source heat system is in a heat supplementing mode;
when the first control valve (181) is in a closed state, the second control valve (182) is in an open state, the third control valve (183) is in a closed state, and the fourth control valve (184) is in an open state, the heat exchange device (12), the power device (13), the end equipment (17), and the heat exchange device (12) are sequentially connected to form a heating loop, so that the ground source heat system is in a heating mode.
11. A method for controlling a ground source heat system according to any one of claims 7 to 10, comprising the steps of:
judging the current season;
and controlling the opening states of the first control valve (181), the second control valve (182), the third control valve (183) and the fourth control valve (184) based on the current season, and controlling the opening states of the heating device (11), the power device (13) and the end equipment (17) based on the current season, and enabling the ground source heat system to operate in a heat supplementing mode or a heating mode.
12. The control method according to claim 11, characterized in that when the current season is summer, the first control valve (181) is controlled to be in an open state, the second control valve (182) is controlled to be in a closed state, the third control valve (183) is controlled to be in an open state, the fourth control valve (184) is controlled to be in a closed state, the heating device (11) and the power device (13) are controlled to be in an open state, the end equipment (17) is controlled to be in a closed state, and the heating device (11), the heat exchange device (12), the power device (13) and the heating device (11) are connected in sequence to form a heat supplementing loop;
when the current season is winter, the first control valve (181) is controlled to be in a closed state, the second control valve (182) is controlled to be in an open state, the third control valve (183) is controlled to be in a closed state, the fourth control valve (184) is controlled to be in an open state, the terminal equipment (17) and the power device (13) are controlled to be in an open state, the heating device (11) is controlled to be in a closed state, and the heat exchange device (12), the power device (13), the terminal equipment (17) and the heat exchange device (12) are sequentially connected to form a heating loop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210438093.0A CN114739050A (en) | 2022-04-25 | 2022-04-25 | Soil heat supplementing assembly based on ground source heat system, ground source heat system and control method |
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| CN202210438093.0A CN114739050A (en) | 2022-04-25 | 2022-04-25 | Soil heat supplementing assembly based on ground source heat system, ground source heat system and control method |
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Cited By (1)
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| CN116007231A (en) * | 2022-12-16 | 2023-04-25 | 珠海格力电器股份有限公司 | Ground source heat pump unit, control method and device thereof and storage medium |
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