CN117128653A - Soil heat balance device and method of ground source heat pump system - Google Patents
Soil heat balance device and method of ground source heat pump system Download PDFInfo
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- CN117128653A CN117128653A CN202311287320.5A CN202311287320A CN117128653A CN 117128653 A CN117128653 A CN 117128653A CN 202311287320 A CN202311287320 A CN 202311287320A CN 117128653 A CN117128653 A CN 117128653A
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- 239000002689 soil Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 206
- 238000005086 pumping Methods 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims 6
- 238000003809 water extraction Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 58
- 238000010438 heat treatment Methods 0.000 description 45
- 230000003203 everyday effect Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
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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
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
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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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- Physics & Mathematics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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Abstract
The application discloses a soil heat balance device and a method of a ground source heat pump system, wherein the device comprises a water inlet main pipe, a water outlet main pipe and a plurality of heat exchange mechanisms, each heat exchange mechanism comprises a heat exchange pipe, the water inlet main pipe is communicated with the water inlet ends of each heat exchange pipe, the water outlet ends of each heat exchange pipe are communicated with the water outlet main pipe, the soil heat balance device of the ground source heat pump system comprises a heat exchange box, a water pump, a water pumping valve and a drain valve, the inlet of the water pump is communicated with the water outlet main pipe, the outlet of the water pump is communicated with the inlet of the heat exchange box through the water pumping valve, and the outlet of the heat exchange box is communicated with the water outlet main pipe through the drain valve. The beneficial effects of the application are as follows: the liquid buried in the underground heat exchange pipe is pumped into the heat exchange box through the water suction pump, the liquid in the heat exchange box is discharged into the underground heat exchange pipe after reaching the room temperature, and the liquid in the underground heat exchange pipe is used for carrying out temperature returning or refrigerating on soil, so that a heat balance state is achieved, and the heat supply capacity in winter or the cold supply capacity in summer is kept stable for a long time.
Description
Technical Field
The application relates to the technical field of ground source heat pump systems, in particular to a soil heat balance device and a soil heat balance method of a ground source heat pump system.
Background
The ground source heat pump system utilizes the characteristic that the temperature of the underground normal temperature soil is relatively stable, and completes the heat exchange with the inside of the building through the buried pipeline system buried around the building. Taking heat from soil in winter, and heating a building; and heat is discharged to the soil in summer, so that the building is refrigerated. Thus, the underground energy input/output can be kept approximately balanced throughout the year.
However, when the ground source heat pump is applied to a region with heat removal in summer being greater than heat removal in winter, the continuous rise of the soil temperature is caused, so that the cooling capacity of the ground source heat pump in summer is reduced year by year, for example, the ground source heat pump is used for drawing cold energy deep in the soil in summer in northern regions of China to refrigerate, a large amount of heat is stored in the soil, the heat stored in the soil cannot be released due to central heating by using coal, the soil heat balance is broken along with the increase of the number of operation years, the soil temperature of a buried pipe region rises, and the cooling operation efficiency of the ground source heat pump in summer is lower and lower;
on the contrary, when the ground source heat pump is applied to the area with the heat emission in summer less than the heat extraction in winter, the soil temperature is always reduced continuously, so that the heat supply capacity of the ground source heat pump in winter is reduced year by year.
In summary, how to solve the problem of soil thermal unbalance to ensure long-term stable operation of the ground source heat pump system is needed to solve the technical problem.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a device and a method for balancing soil heat of a ground source heat pump system, which are used for solving the technical problem that the heat supply capacity of the ground source heat pump in winter or the cold supply capacity in summer is easily reduced in the state of unbalance of long-term cold supply and heat supply of the ground source heat pump system.
In order to achieve the above object, the application provides a soil heat balance device of a ground source heat pump system, the ground source heat pump system comprises a water inlet main pipe, a water outlet main pipe and a plurality of heat exchange mechanisms, each heat exchange mechanism comprises a heat exchange pipe, the water inlet main pipe is communicated with the water inlet end of each heat exchange pipe, the water outlet end of each heat exchange pipe is communicated with the water outlet main pipe, the soil heat balance device of the ground source heat pump system comprises a heat exchange box, a water pump, a water pumping valve and a drain valve, the inlet of the water pump is communicated with the water outlet main pipe, the outlet of the water pump is communicated with the inlet of the heat exchange box through the water pumping valve, and the outlet of the heat exchange box is communicated with the water outlet main pipe through the drain valve.
In some embodiments, the water outlet main pipe is provided with a water outlet temperature detection part, and the water inlet main pipe is provided with a water inlet temperature detection part;
the ground source heat pump system further comprises a water inlet connecting pipe and a water outlet connecting pipe, one end of the water inlet connecting pipe is communicated with the water inlet main pipe, the other end of the water inlet connecting pipe is communicated with an outlet of a pump group of the ground source heat pump system, a main water inlet valve is arranged on the water inlet connecting pipe, one end of the water outlet connecting pipe is communicated with the water outlet main pipe, the other end of the water outlet connecting pipe is communicated with an inlet of the pump group of the ground source heat pump system, and a total water outlet valve and a first flowmeter are arranged on the water outlet connecting pipe;
the soil heat balance device of the ground source heat pump system further comprises a water pumping pipe and a second flowmeter, one end of the water pumping pipe is communicated with the water outlet main pipe, the other end of the water pumping pipe is communicated with an inlet of the water pumping pump, and the second flowmeter is arranged in the water pumping pipe.
In some embodiments, the soil heat balance device of the ground source heat pump system further comprises a water outlet tee, a first interface of the water outlet tee is communicated with the water outlet main pipe, a second interface of the water outlet tee is communicated with the water outlet connecting pipe, and a third interface of the water outlet tee is communicated with the water pumping pipe.
In some embodiments, the soil heat balance device of the ground source heat pump system further comprises a drain pipe, one end of the drain pipe is communicated with the outlet of the heat exchange box, the other end of the drain pipe is communicated with the water outlet main pipe, and the drain valve is arranged on the drain pipe.
In some embodiments, an in-box temperature detecting member is arranged in the heat exchange box, and an outdoor temperature detecting member is arranged outside the heat exchange box.
In some embodiments, the soil heat balance device of the ground source heat pump system further comprises a water inlet tee, a first interface of the water inlet tee is communicated with the water inlet header pipe, a second interface of the water inlet tee is communicated with the water inlet connecting pipe, and a third interface of the water inlet tee is communicated with the water drain pipe.
In some embodiments, the upper end of the heat exchange box is provided with a ventilation valve.
In some embodiments, the ground source heat pump system further includes a plurality of out-pipe soil temperature detection mechanisms, where the number of out-pipe soil temperature detection mechanisms is equal to and corresponds to the number of heat exchange mechanisms one by one, and each out-pipe soil temperature detection mechanism is used for detecting the temperature of soil outside the heat exchange pipe of the corresponding heat exchange mechanism.
In some embodiments, each of the outside-tube soil temperature detecting mechanisms includes a plurality of outside-tube soil temperature detecting members and fixing members, and each of the outside-tube soil temperature detecting members is fixed to the corresponding heat exchange tube of the heat exchange mechanism by the corresponding fixing member.
The application also provides a soil heat balance method of the ground source heat pump system, which is suitable for the soil heat balance device of the ground source heat pump system and comprises the following steps:
s1, detecting a heat balance state of soil near a heat exchange tube of a ground source heat pump system, wherein the heat balance state comprises a heat unbalance state, a cold unbalance state and a cold and heat balance state;
s2, if the soil near the heat exchange pipes of the ground source heat pump system is in a heat unbalance state and the outdoor temperature is lower than the temperature of the underground constant temperature layer, or if the soil near the heat exchange pipes of the ground source heat pump system is in a cold unbalance state and the outdoor temperature is higher than the temperature of the underground constant temperature layer, the water pumping valve and the water pump are started to pump the liquid in each heat exchange pipe into the heat exchange box, when the heat exchange box is filled, the water pumping valve and the water pump are closed, and after the liquid in the heat exchange box reaches the outdoor temperature, the water draining valve is started to enable the liquid in the heat exchange box to enter each heat exchange pipe;
and S3, repeating the step S2 after a period of time, until the soil near the heat exchange tube reaches a cold-heat balance state.
Compared with the prior art, the technical scheme provided by the application has the beneficial effects that: when the thermal unbalance or the cold unbalance of the soil is detected, the liquid buried in the underground heat exchange tube is pumped into the heat exchange box through the water suction pump, the liquid in the heat exchange box is discharged into the underground heat exchange tube after reaching the room temperature, and the liquid in the underground heat exchange tube returns the temperature or refrigerates the soil, so that the thermal balance state is achieved, the approximate balance of the underground energy input and output can be ensured, the temperature of the underground soil can be maintained for a long time, and the heating capacity in winter or the cooling capacity in summer can be kept stable for a long time.
Drawings
FIG. 1 is a schematic diagram of a soil heat balance device and method for a ground source heat pump system according to an embodiment of the present application;
FIG. 2 is a schematic view of the soil heat balance device of FIG. 1;
FIG. 3 is an enlarged view of a portion of area A of FIG. 1;
in the figure: 1-water inlet main pipe, 11-water inlet temperature detection piece, 2-water outlet main pipe, 21-water outlet temperature detection piece, 3-heat exchange mechanism, 31-heat exchange pipe, 4-soil heat balance device, 41-heat exchange box, 411-in-box temperature detection piece, 412-ventilation valve, 42-water pump, 43-water pumping valve, 44-drain valve, 45-water outlet tee joint, 46-water pumping pipe, 461-second flowmeter, 47-drain pipe, 48-water inlet tee joint, 5-water inlet connecting pipe, 51-main water inlet valve, 6-water outlet connecting pipe, 61-total water outlet valve, 62-first flowmeter, 7-out-of-pipe soil temperature detection mechanism, 71-out-of-pipe soil temperature detection piece and 72-fixing piece.
Detailed Description
The following detailed description of preferred embodiments of the application is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the application, are used to explain the principles of the application and are not intended to limit the scope of the application.
Referring to fig. 1-3, the application provides a soil heat balance device of a ground source heat pump system, the ground source heat pump system comprises a water inlet main pipe 1, a water outlet main pipe 2 and a plurality of heat exchange mechanisms 3, each heat exchange mechanism 3 comprises a heat exchange pipe 31, the water inlet main pipe 1 is communicated with the water inlet end of each heat exchange pipe 31, the water outlet end of each heat exchange pipe 31 is communicated with the water outlet main pipe 2, the soil heat balance device 4 of the ground source heat pump system comprises a heat exchange box 41, a water pump 42, a water pumping valve 43 and a water draining valve 44, an inlet of the water pump 42 is communicated with the water outlet main pipe 2, an outlet of the water pump 42 is communicated with an inlet of the heat exchange box 41 through the water pumping valve 44, and an outlet of the heat exchange box 41 is communicated with the water outlet main pipe 2 through the water draining valve 44.
In use, detecting a thermal equilibrium state of soil in the vicinity of the heat exchange tube 31 of the ground source heat pump system, wherein the thermal equilibrium state includes a thermal imbalance state, a cold imbalance state, and a cold-and-hot equilibrium state; if the soil near the heat exchange tube 31 of the ground source heat pump system is in a heat imbalance state and the outdoor temperature is lower than the temperature of an underground constant temperature layer (the temperature at the depth of about 100 meters in the ground is 10-20 ℃ in general), or if the soil near the heat exchange tube 31 of the ground source heat pump system is in a cold imbalance state and the outdoor temperature is higher than the temperature of the underground constant temperature layer, a water pumping valve and a water pump are started to pump the liquid in each heat exchange tube into the heat exchange box, when the heat exchange box is filled, the water pumping valve and the water pump are closed, after the liquid in the heat exchange box reaches the outdoor temperature, a water discharging valve is started to enable the liquid in the heat exchange box to enter each heat exchange tube; and repeating the steps after a period of time until the soil near the heat exchange tube reaches a cold-heat balance state.
In the application, the specific judging method of the heat balance state is as follows:
(1) Acquiring total cooling capacity/total heat supply capacity of the last cooling/heating season;
(2) Setting the total number of days of the current cooling/heating season, obtaining the cooling/heating quantity required by the current cooling/heating season every day according to the total cooling quantity/total heating quantity of the previous cooling/heating season and the total number of days of the current cooling/heating season, and obtaining the cooling/heating quantity required by the current cooling/heating season every day according to the cooling/heating quantity required by the current cooling/heating season every day;
(3) Acquiring the current actual cooling/heating quantity in the current cooling/heating season;
(4) The heat balance state is determined by comparing the current required heat supply/heat supply quantity in the current heat supply/heat supply season with the current actual heat supply/heat supply quantity in the current heat supply/heat supply season, specifically:
if the current required cooling capacity of the current cooling season is greater than the current actual cooling capacity of the current cooling season or the current required heating capacity of the current heating season is less than the current actual heating capacity of the current heating season, the soil is in a cold unbalanced state;
if the current required cooling capacity in the current cooling season is less than the current actual cooling capacity in the current cooling season or the current required heating capacity in the current heating season is greater than the current actual heating capacity in the current heating season, the soil is in a heat imbalance state.
When the thermal unbalance or the cold unbalance of the soil is detected, the liquid buried in the underground heat exchange tube 31 is pumped into the heat exchange box 41 by the water suction pump 42, the liquid in the heat exchange box 41 reaches room temperature and is discharged into the underground heat exchange tube 31, the liquid in the underground heat exchange tube 31 is used for carrying out temperature returning or refrigeration on the soil, so that the thermal balance state is achieved, the approximate balance of the underground energy input and output can be ensured, the temperature of the underground soil can be maintained for a long time, and the heating capacity in winter or the cooling capacity in summer can be kept stable for a long time.
In order to facilitate the detection of the thermal equilibrium state of the underground soil, referring to fig. 1 and 2, in a preferred embodiment, the water outlet main pipe 2 is provided with a water outlet temperature detecting member 21, and the water inlet main pipe 1 is provided with a water inlet temperature detecting member 11; the ground source heat pump system further comprises a water inlet connecting pipe 5 and a water outlet connecting pipe 6, one end of the water inlet connecting pipe 5 is communicated with the water inlet header pipe 1, the other end of the water inlet connecting pipe 5 is communicated with an outlet of a pump group of the ground source heat pump system, a main water inlet valve 51 is arranged on the water inlet connecting pipe 5, one end of the water outlet connecting pipe 6 is communicated with the water outlet header pipe 2, the other end of the water outlet connecting pipe 6 is communicated with an inlet of the pump group of the ground source heat pump system, and a total water outlet valve 61 and a first flowmeter 62 are arranged on the water outlet connecting pipe 6; the soil heat balance device 4 of the ground source heat pump system further comprises a water pumping pipe 46 and a second flowmeter 461, one end of the water pumping pipe 46 is communicated with the water outlet header pipe 2, the other end of the water pumping pipe 46 is communicated with the inlet of the water pumping pump 42, and the second flowmeter 461 is arranged in the water pumping pipe 46.
In this embodiment, in the last cooling/heating season, the water supply temperature difference is obtained through the water outlet temperature detecting element 21 and the water inlet temperature detecting element 11, the water supply flow is obtained according to the flow meter, the water supply flow is equally divided into a plurality of sections, the average water supply temperature difference of each section is obtained, and finally the total cooling capacity/total heat supply capacity in the last cooling/heating season is obtained;
setting the total number of days of the current cooling/heating season, dividing the total cooling/total heating capacity of the previous cooling/heating season by the total number of days of the current cooling/heating season to obtain the cooling/heating capacity required by the current cooling/heating season every day, and obtaining the cooling/heating capacity required by the current cooling/heating season according to the cooling/heating capacity required by the current cooling/heating season every day;
then, in the current cooling/heating season, the water supply flow in the normal use state is obtained by the first flowmeter 62, the water supply flow is equally divided into a plurality of sections, the average water supply temperature difference of each section is obtained, the total cooling/total heat supply in the normal use state is obtained, the water supply flow when the soil heat balance device 4 is started is obtained by the second flowmeter 461, the water supply flow is equally divided into a plurality of sections, the average water supply temperature difference of each section is obtained, the total cooling/total heat supply when the soil heat balance device 4 is started is obtained, the total cooling/total heat supply in the normal use state and the total cooling/total heat supply when the soil heat balance device 4 is started are added to obtain the current actual cooling/heat supply in the current cooling season, and then the cooling/heat supply required in the current cooling/heat supply season is compared with the current actual cooling/heat supply in the current cooling/heat supply season in the current cooling season, so as to obtain the underground soil heat balance state.
In this embodiment, in the specific implementation, the first cooling/heating season does not start the soil heat balance device, the second cooling/heating season starts the soil heat balance device according to the actual situation of the first cooling/heating season to perform soil heat balance, the third cooling/heating season does not start the soil heat balance device, and the fourth cooling/heating season starts the soil heat balance device according to the actual situation of the third cooling/heating season to perform soil heat balance, so that the cycle is repeated, and the soil dynamic heat balance on a long-term scale is ensured.
In order to facilitate the connection of the pipes, referring to fig. 1 and 2, in a preferred embodiment, the soil heat balance device 4 of the ground source heat pump system further includes a water outlet tee 45, a first port of the water outlet tee 45 is communicated with the water outlet main 2, a second port of the water outlet tee 45 is communicated with the water outlet connection pipe 6, and a third port of the water outlet tee 45 is communicated with the water pumping pipe 7.
In order to facilitate the concrete arrangement of the drain valve 44, referring to fig. 1 and 2, in a preferred embodiment, the soil heat balance device 4 of the ground source heat pump system further includes a drain pipe 47, one end of the drain pipe 47 is communicated with the outlet of the heat exchange box 41, the other end of the drain pipe 47 is communicated with the water outlet manifold 2, and the drain valve 44 is disposed on the drain pipe 47.
In order to facilitate the connection of the pipes, referring to fig. 1 and 2, in a preferred embodiment, the soil heat balance device of the ground source heat pump system further comprises a water inlet tee 48, wherein a first port of the water inlet tee 48 is communicated with the water inlet manifold 1, a second port of the water inlet tee 48 is communicated with the water inlet connection pipe 5, and a third port of the water inlet tee 48 is communicated with the water drain pipe 47.
In order to conveniently detect the temperature inside the heat exchange box and the temperature outside the heat exchange box, referring to fig. 1 and 2, in a preferred embodiment, an inside temperature detecting member 411 is disposed inside the heat exchange box 41, and an outside temperature detecting member is disposed outside the heat exchange box.
In order to facilitate the injection of the liquid into the heat exchange tank 41, referring to fig. 1 and 2, in a preferred embodiment, an air-permeable valve 412 is disposed at the upper end of the heat exchange tank 41, and the air-permeable valve 412 is opened when in use, and is closed when not in use for a long time, so as to prevent the entry of contaminants into the heat exchange tank 41.
In order to facilitate the detection of the temperature of the underground soil, referring to fig. 1-3, in a preferred embodiment, the ground source heat pump system further includes a plurality of out-pipe soil temperature detection mechanisms 7, where the number of out-pipe soil temperature detection mechanisms 7 is equal to and corresponds to the number of the heat exchange mechanisms 3, and each out-pipe soil temperature detection mechanism 7 is used for detecting the temperature of the soil outside the corresponding heat exchange tube 31 of the heat exchange mechanism 3.
In order to specifically implement the function of the out-of-pipe soil temperature detection mechanism 7, please refer to fig. 1-3, in a preferred embodiment, each out-of-pipe soil temperature detection mechanism 7 includes a plurality of out-of-pipe soil temperature detection members 71 and fixing members 72, and each out-of-pipe soil temperature detection member 71 is fixed to the corresponding heat exchange tube 31 of the heat exchange mechanism 3 through the corresponding fixing member 72.
The application also provides a soil heat balance method of the ground source heat pump system, which is suitable for the soil heat balance device of the ground source heat pump system and comprises the following steps:
s1, detecting a heat balance state of soil near a heat exchange tube 31 of a ground source heat pump system, wherein the heat balance state comprises a heat unbalance state, a cold unbalance state and a cold and heat balance state;
s2, if the soil near the heat exchange tubes 31 of the ground source heat pump system is in a heat unbalance state and the outdoor temperature is lower than the temperature of the underground constant temperature layer, or if the soil near the heat exchange tubes 31 of the ground source heat pump system is in a cold unbalance state and the outdoor temperature is higher than the temperature of the underground constant temperature layer, the water pumping valve 43 and the water pump 42 are started to pump the liquid in each heat exchange tube 31 into the heat exchange tube 41, when the heat exchange tube 41 is filled, the water pumping valve 43 and the water pump 42 are closed, and after the liquid in the heat exchange tube 41 reaches the outdoor temperature, the water draining valve 44 is opened to enable the liquid in the heat exchange tube 41 to enter each heat exchange tube 31;
and S3, repeating the step S2 after a period of time, until the soil near the heat exchange tube 31 reaches a cold-heat balance state.
When the thermal unbalance or the cold unbalance of the soil is detected, the liquid buried in the underground heat exchange tube 31 is pumped into the heat exchange box 41 by the water suction pump 42, the liquid in the heat exchange box 41 reaches room temperature and is discharged into the underground heat exchange tube 31, the liquid in the underground heat exchange tube 31 is used for carrying out temperature returning or refrigeration on the soil, so that the thermal balance state is achieved, the approximate balance of the underground energy input and output can be ensured, the temperature of the underground soil can be maintained for a long time, and the heating capacity in winter or the cooling capacity in summer can be kept stable for a long time.
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application.
Claims (10)
1. The utility model provides a ground source heat pump system's soil heat balance device, ground source heat pump system includes intake manifold, play water header pipe and a plurality of heat transfer mechanism, each heat transfer mechanism all includes the heat exchange tube, intake manifold with each the intake end of heat exchange tube all communicates, each the play water end of heat exchange tube all with play water header pipe communicates, its characterized in that, ground source heat pump system's soil heat balance device includes heat exchange tank, suction pump, water extraction valve and drain valve, the inlet of suction pump with go out water header pipe intercommunication, the outlet of suction pump is via the suction valve with the inlet intercommunication of heat exchange tank, the outlet of heat exchange tank via the drain valve with play water header pipe intercommunication.
2. The soil heat balance device of a ground source heat pump system according to claim 1, wherein a water outlet temperature detection member is arranged on the water outlet main pipe, and a water inlet temperature detection member is arranged on the water inlet main pipe;
the ground source heat pump system further comprises a water inlet connecting pipe and a water outlet connecting pipe, one end of the water inlet connecting pipe is communicated with the water inlet main pipe, the other end of the water inlet connecting pipe is communicated with an outlet of a pump group of the ground source heat pump system, a main water inlet valve is arranged on the water inlet connecting pipe, one end of the water outlet connecting pipe is communicated with the water outlet main pipe, the other end of the water outlet connecting pipe is communicated with an inlet of the pump group of the ground source heat pump system, and a total water outlet valve and a first flowmeter are arranged on the water outlet connecting pipe;
the soil heat balance device of the ground source heat pump system further comprises a water pumping pipe and a second flowmeter, one end of the water pumping pipe is communicated with the water outlet main pipe, the other end of the water pumping pipe is communicated with an inlet of the water pumping pump, and the second flowmeter is arranged in the water pumping pipe.
3. The ground source heat pump system of claim 2, further comprising a water outlet tee, a first port of the water outlet tee being in communication with the water outlet manifold, a second port of the water outlet tee being in communication with the water outlet connecting pipe, and a third port of the water outlet tee being in communication with the water pumping pipe.
4. The apparatus according to claim 2, further comprising a drain pipe, one end of the drain pipe being communicated with the outlet of the heat exchange tank, the other end of the drain pipe being communicated with the water outlet manifold, and the drain valve being provided on the drain pipe.
5. The apparatus according to claim 4, wherein an in-tank temperature detecting member is provided in the heat exchange tank, and an outdoor temperature detecting member is provided outside the heat exchange tank.
6. The ground source heat pump system of claim 4, further comprising a water intake tee, a first port of the water intake tee being in communication with the water intake manifold, a second port of the water intake tee being in communication with the water intake connecting tube, and a third port of the water intake tee being in communication with the water drain tube.
7. The soil heat balance device of a ground source heat pump system according to claim 1, wherein an air-permeable valve is provided at an upper end of the heat exchange tank.
8. The soil heat balance device of a ground source heat pump system according to claim 1, further comprising a plurality of out-of-tube soil temperature detection mechanisms, wherein the number of out-of-tube soil temperature detection mechanisms is equal to and corresponds to the number of heat exchange mechanisms one by one, and each out-of-tube soil temperature detection mechanism is used for detecting the temperature of soil outside the heat exchange tube of the corresponding heat exchange mechanism.
9. The apparatus according to claim 8, wherein each of the outside-tube soil temperature detecting means includes a plurality of outside-tube soil temperature detecting members and fixing members, and each of the outside-tube soil temperature detecting members is fixed to the heat exchange tube of the corresponding heat exchange means by the corresponding fixing member.
10. A method of soil heat balance for a ground source heat pump system, characterized by being applied to a soil heat balance device for a ground source heat pump system according to any one of claims 1 to 9, and comprising the steps of:
s1, detecting a heat balance state of soil near a heat exchange tube of a ground source heat pump system, wherein the heat balance state comprises a heat unbalance state, a cold unbalance state and a cold and heat balance state;
s2, if the soil near the heat exchange pipes of the ground source heat pump system is in a heat unbalance state and the outdoor temperature is lower than the temperature of the underground constant temperature layer, or if the soil near the heat exchange pipes of the ground source heat pump system is in a cold unbalance state and the outdoor temperature is higher than the temperature of the underground constant temperature layer, the water pumping valve and the water pump are started to pump the liquid in each heat exchange pipe into the heat exchange box, when the heat exchange box is filled, the water pumping valve and the water pump are closed, and after the liquid in the heat exchange box reaches the outdoor temperature, the water draining valve is started to enable the liquid in the heat exchange box to enter each heat exchange pipe;
and S3, repeating the step S2 after a period of time, until the soil near the heat exchange tube reaches a cold-heat balance state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311287320.5A CN117128653A (en) | 2023-10-07 | 2023-10-07 | Soil heat balance device and method of ground source heat pump system |
Applications Claiming Priority (1)
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