Solar energy and self-sustaining heat extraction coupled geothermal heat supplement system

Abstract

The utility model relates to the technical field of geothermal heat supplement, disclose a kind of solar energy and self-supporting heat extraction coupling geothermal heat supplement system, comprising: underground heat exchange module, for setting in shallow underground and soil or underground water heat exchange;Through setting underground heat exchange module, in heating period, the case of sufficient sunlight in daytime, utilize shallow geothermal that underground heat exchange module draws, again through and ground source heat pump module, heat is transmitted to user residence and is heated, in non-heating season, without refrigeration and the case of sufficient sunlight in daytime, utilize solar energy photothermal module to absorb heat and re-inject to shallow underground, in the case of no light or cloudy night, through self-supporting heat extraction module, ground source heat pump module is provided with heat, so that ground source heat pump module transmits heat to underground heat exchange module, heat is released to shallow underground by underground heat exchange module, in this way, heat can also be injected to underground when dark, it is convenient to make underground soil restore original temperature, prevent geotemperature imbalance.

Description

Technical Field

[0001] This utility model relates to the field of geothermal heat replenishment technology, and in particular to a geothermal heat replenishment system that couples solar energy with self-sustaining heat extraction. Background Technology

[0002] In northern my country, an increasing number of buildings are using shallow geothermal heating, which not only saves a significant amount of energy but also boasts extremely low operating costs, leading to its widespread adoption. However, a major problem with shallow geothermal utilization is the imbalance in ground temperature after heat extraction. In northern regions, long winters for heating and short or no summer cooling periods result in insufficient heat transfer back to the soil during the summer, preventing the soil from returning to its original temperature and, after several years, rendering the soil unable to provide heat. Currently, the best solution is to use solar thermal collectors to recover solar energy in the summer to replenish the soil's heat. However, the high investment in solar thermal collectors increases the overall system cost and reduces its economic viability.

[0003] In existing technologies, it is impossible to effectively inject heat back into shallow geothermal layers at night or when there is no sunlight to restore the soil to its original temperature, which will cause the ground temperature to become unbalanced. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a geothermal supplementary heating system that couples solar energy with self-sustaining heat extraction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction includes:

[0007] Underground heat exchange modules are used to exchange heat with soil or groundwater in shallow underground layers.

[0008] Ground source heat pump modules are used to increase the low heat absorbed by underground heat exchange modules to a high heat for heating.

[0009] The self-sustaining heat extraction module is used to replenish the heat taken from the soil for winter heating, so as to keep the soil temperature balanced.

[0010] Solar thermal modules are used to absorb heat and inject it into shallow underground layers.

[0011] One end of the underground heat exchange module is connected to the input end of the ground source heat pump module, and the output end of the ground source heat pump module is connected to the user's house for heating the user's house. The solar thermal module is connected to the ground source heat pump module for transferring heat energy to the underground heat exchange module. The input end of the self-sustaining heat extraction module is connected to the ground source heat pump module for releasing the heat generated by the self-sustaining heat extraction module to the underground heat exchange module through heat exchange with the ground source heat pump module, so as to inject heat into the shallow underground.

[0012] Preferably, the underground heat exchange module includes a buried pipe embedded in the shallow underground layer and a first circulating water pipe connected to the buried pipe, which drives water to circulate in the buried pipe to absorb low-temperature heat from the shallow underground layer and transport it to the ground source heat pump module.

[0013] Preferably, the ground source heat pump module includes an evaporator module, a second circulating water pipe is provided on the evaporator module, a condenser module is connected to one side of the evaporator module, and a third circulating water pipe is provided on the condenser module. The heat from the first circulating water pipe is transferred to the second circulating water pipe through the evaporator module, and the heat is exchanged between the second circulating water pipe and the third circulating water pipe, so that the third circulating water pipe delivers the heat to the user's residence.

[0014] Preferably, the solar thermal module includes a collector module installed on the ground, and a fourth circulating water pipe is also installed on the collector module. The collector module converts light energy into heat energy, and then uses the heat energy to heat the water in the fourth circulating water pipe. The hot water is then transported to one side of the first circulating water pipe through the fourth circulating water pipe, so that the first circulating water pipe can transport the hot water to the shallow underground layer, where the heat of the hot water is released and stored for use in winter.

[0015] Preferably, the self-sustaining heating module includes a box installed on the ground and a fifth circulating water pipe installed inside the box. The box also contains a water tank for storing water and a sixth circulating water pipe. The fifth and sixth circulating water pipes are connected by a heat exchange component, and the water tank is located between and in close contact with the fifth and sixth circulating water pipes. An air inlet pipe is provided on one side of the box for connecting to an outdoor air conditioning unit, so that the hot air blown out by the outdoor air conditioning unit heats the water in the sixth circulating water pipe. The water in the water tank and the water in the fifth circulating water pipe are heated by the heat. The hot water in the fifth circulating water pipe exchanges heat with the third circulating water pipe, then with the second circulating water pipe, and finally with the first circulating water pipe, so that the heat is transported to the shallow underground.

[0016] Preferably, the outer periphery of the fifth and sixth circulating water pipes is equipped with several heat-conducting plates, which are in contact with one side of the water tank to increase the heat transfer efficiency.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention utilizes an underground heat exchange module. During the heating season, when there is ample sunlight, the underground heat exchange module extracts shallow geothermal heat and then transfers the heat to the user's residence for heating via a ground source heat pump module. During the non-heating season, when cooling is not needed and there is ample sunlight, a solar thermal module absorbs heat and re-injects it into the shallow underground. At night, when there is no sunlight or it is cloudy, a self-sustaining heat extraction module provides heat to the ground source heat pump module, which then transfers the heat to the underground heat exchange module. The underground heat exchange module releases the heat into the shallow underground, thus injecting heat into the ground even at night, facilitating the restoration of the underground soil to its original temperature and preventing ground temperature imbalance. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of a geothermal heat replenishment system that couples solar energy with self-sustaining heat extraction, as proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the casing of a geothermal supplementary heating system that couples solar energy with self-sustaining heat extraction, as proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the interior of a geothermal supplementary heating system that couples solar energy with self-sustaining heat extraction, as proposed in this utility model.

[0022] In the diagram: 1. Underground heat exchange module; 2. Ground source heat pump module; 3. Self-sustaining heat extraction module; 4. Solar thermal module; 5. Buried pipe; 6. First circulating water pipe; 7. Second circulating water pipe; 8. Evaporator module; 9. Condenser module; 10. Collector module; 11. Residential building; 12. Third circulating water pipe; 13. Fourth circulating water pipe; 14. Housing; 15. Fifth circulating water pipe; 16. Sixth circulating water pipe; 17. Water tank; 18. Heat conduction plate; 19. Air inlet pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1 to 3 A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction, comprising:

[0025] Underground heat exchange modules are used to exchange heat with soil or groundwater in shallow underground layers.

[0026] Ground source heat pump modules are used to increase the low heat absorbed by underground heat exchange modules to a high heat for heating.

[0027] The self-sustaining heat extraction module is used to replenish the heat taken from the soil for winter heating, so as to keep the soil temperature balanced.

[0028] Solar thermal modules are used to absorb heat and inject it into shallow underground layers.

[0029] One end of the underground heat exchange module is connected to the input end of the ground source heat pump module, and the output end of the ground source heat pump module is connected to the user's house for heating the user's house. The solar thermal module is connected to the ground source heat pump module for transferring heat energy to the underground heat exchange module. The input end of the self-sustaining heat extraction module is connected to the ground source heat pump module for releasing the heat generated by the self-sustaining heat extraction module to the underground heat exchange module through heat exchange with the ground source heat pump module, so as to inject heat into the shallow underground.

[0030] When in use, this device employs an underground heat exchange module. During the heating season, when there is ample sunlight, the underground heat exchange module extracts shallow geothermal energy and then transfers the heat to the user's residence through a ground source heat pump module for heating. During the non-heating season, when cooling is not needed and there is ample sunlight, the solar thermal module absorbs heat and re-injects it into the shallow underground layer. At night, when there is no sunlight or it is cloudy, the self-sustaining heat extraction module provides heat to the ground source heat pump module, which then transfers the heat to the underground heat exchange module. The underground heat exchange module releases the heat into the shallow underground layer, thus injecting heat into the ground even at night, helping the underground soil to return to its original temperature and preventing ground temperature imbalance.

[0031] Furthermore, the underground heat exchange module includes a buried pipe embedded in the shallow underground layer and a first circulating water pipe connected to the buried pipe, which drives water to circulate in the buried pipe to absorb low-temperature heat from the shallow underground layer and transport it to the ground source heat pump module.

[0032] Furthermore, the ground source heat pump module includes an evaporator module, on which a second circulating water pipe is provided. A condenser module is connected to one side of the evaporator module, and a third circulating water pipe is provided on the condenser module. The heat from the first circulating water pipe is transferred to the second circulating water pipe through the evaporator module. The second circulating water pipe exchanges heat with the third circulating water pipe, so that the third circulating water pipe delivers the heat to the user's residence.

[0033] Furthermore, the solar thermal module includes a collector module installed on the ground. The collector module is also equipped with a fourth circulating water pipe. The fourth circulating water pipe can exchange heat with both the first and second circulating water pipes. The collector module converts light energy into heat energy, which then heats the water in the fourth circulating water pipe. The hot water is then transported to one side of the first circulating water pipe through the fourth circulating water pipe, allowing the first circulating water pipe to transport the hot water to shallow underground layers. The heat of the hot water is then released and stored in the shallow underground layers for use in winter.

[0034] Furthermore, the self-sustaining heating module includes a box installed on the ground and a fifth circulating water pipe installed inside the box. The box also contains a water tank for storing water and a sixth circulating water pipe. The fifth and sixth circulating water pipes are connected by a heat exchange assembly, with the water tank located between and in close contact with both pipes. An air inlet pipe is installed on one side of the box for connecting to an outdoor air conditioning unit, allowing the hot air blown out by the unit to heat the water in the sixth circulating water pipe. This heat heats the water in the water tank and the water in the fifth circulating water pipe. The hot water in the fifth circulating water pipe then exchanges heat with a third circulating water pipe, which in turn exchanges heat with a second circulating water pipe. Finally, the second circulating water pipe exchanges heat with a first circulating water pipe, allowing the heat to be transferred to shallow underground injection.

[0035] During the summer daytime, hot water is transported to one side of the second circulating water pipe through the fourth circulating water pipe, allowing the water in the second circulating water pipe to exchange heat with the hot water in the fourth circulating water pipe. The second circulating water pipe then exchanges heat with the first and third circulating water pipes, allowing the first circulating water pipe to transport the hot water to shallow underground layers, where the heat of the hot water is released and stored for use in winter. The third circulating water pipe can also exchange heat with the fifth circulating water pipe, allowing the fifth circulating water pipe to heat the water in the tank. During the day, the solar collector module collects heat and transfers it to the water tank to heat the water. At night, the hot water in the tank can heat the water in the fifth circulating water pipe, allowing the heat from the hot water in the fifth circulating water pipe to be released back into the ground to replenish the underground heat source.

[0036] Furthermore, several heat-conducting plates are installed on the outer periphery of both the fifth and sixth circulating water pipes. These heat-conducting plates are in contact with one side of the water tank to increase the efficiency of heat transfer.

[0037] The outer periphery of the first, second, third, fourth, fifth, and sixth circulating water pipes is equipped with a circulating water pump to drive the water in the pipes to circulate along the pipes.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction, characterized in that: include: An underground heat exchange module (1) is used to be installed in shallow underground layers to exchange heat with soil or groundwater. The ground source heat pump module (2) is used to raise the low heat absorbed by the underground heat exchange module (1) to a high heat for heating; The self-sustaining heat extraction module (3) is used to supplement the heat taken from the soil for winter heating, so that the soil temperature remains balanced. Solar thermal module (4) is used to absorb heat and inject it into shallow underground layers; One end of the underground heat exchange module (1) is connected to the input end of the ground source heat pump module (2). The output end of the ground source heat pump module (2) is connected to the user's house for heating the user's house. The solar thermal module (4) is connected to the ground source heat pump module (2) for transmitting heat energy to the underground heat exchange module (1). The input end of the self-sustaining heat extraction module (3) is connected to the ground source heat pump module (2) for releasing heat to the underground heat exchange module (1) through heat exchange via the ground source heat pump module (2) to inject heat into the shallow underground.

2. The geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction according to claim 1, characterized in that: The underground heat exchange module (1) includes a buried pipe (5) embedded in the shallow underground layer and a first circulating water pipe (6) connected to the buried pipe (5) for driving water to circulate in the buried pipe (5) to absorb low-temperature heat from the shallow underground layer and transport it to the ground source heat pump module (2).

3. A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction according to claim 2, characterized in that: The ground source heat pump module (2) includes an evaporator module (8), on which a second circulating water pipe (7) is provided. A condenser module (9) is connected to one side of the evaporator module (8), and a third circulating water pipe (12) is provided on the condenser module (9). The heat from the first circulating water pipe (6) is transferred to the second circulating water pipe (7) through the evaporator module (8). The second circulating water pipe (7) exchanges heat with the third circulating water pipe (12), so that the third circulating water pipe (12) delivers heat to the user's residence (11).

4. A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction according to claim 3, characterized in that: The solar thermal module (4) includes a collector module (10) installed on the ground. The collector module (10) is also equipped with a fourth circulating water pipe (13). The collector module (10) converts light energy into heat energy, and then heats the water in the fourth circulating water pipe (13) through the heat energy. The hot water is then transported to one side of the first circulating water pipe (6) through the fourth circulating water pipe (13), so that the first circulating water pipe (6) transports the hot water to the shallow underground layer and releases the heat of the hot water to the shallow underground layer for storage, so that it can be used in winter.

5. A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction according to claim 4, characterized in that: The self-sustaining heat extraction module (3) includes a box (14) installed on the ground and a fifth circulating water pipe (15) installed inside the box (14). A water tank (17) is also installed inside the box (14) for storing water. A sixth circulating water pipe (16) is also installed inside the box (14). The fifth circulating water pipe (15) and the sixth circulating water pipe (16) are connected by a heat exchange component. The water tank (17) is located between the fifth circulating water pipe (15) and the sixth circulating water pipe (16) and is in close contact with the fifth circulating water pipe (15) and the sixth circulating water pipe (16). An air inlet pipe (19) is provided on one side of the box (14) for connecting the outdoor unit of the air conditioner, so that the hot air blown out by the outdoor unit of the air conditioner heats the water in the sixth circulating water pipe (16), and heats the water in the water tank (17) and the water in the fifth circulating water pipe (15). Then, the hot water in the fifth circulating water pipe (15) exchanges heat with the third circulating water pipe (12), and the third circulating water pipe (12) exchanges heat with the second circulating water pipe (7). Then, the second circulating water pipe (7) exchanges heat with the first circulating water pipe (6), so that the heat is transported to the shallow underground.

6. A geothermal supplementary heating system coupling solar energy and self-sustaining heat extraction according to claim 5, characterized in that: Several heat-conducting plates (18) are installed on the outer periphery of the fifth circulating water pipe (15) and the sixth circulating water pipe (16). The heat-conducting plates (18) are in contact with one side of the water tank (17) to increase the heat transfer efficiency.

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