CN220958984U - Efficient heat pump unit for gradient utilization of middle-deep geothermal rock heat - Google Patents
Efficient heat pump unit for gradient utilization of middle-deep geothermal rock heat Download PDFInfo
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- CN220958984U CN220958984U CN202322636229.1U CN202322636229U CN220958984U CN 220958984 U CN220958984 U CN 220958984U CN 202322636229 U CN202322636229 U CN 202322636229U CN 220958984 U CN220958984 U CN 220958984U
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- 230000008020 evaporation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000008400 supply water Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 6
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Abstract
The utility model provides a high-efficiency heat pump unit for cascade utilization of middle-deep geothermal rock heat, and belongs to the field of heat exchange of middle-deep geothermal rock heat. The heat pump unit comprises a ground rock heat pump system, a first heat exchange system and a second heat exchange system. The efficient heat pump unit utilizing the gradient utilization of the middle-deep layer geothermal heat can be completely suitable for the working condition of large water supply temperature change range of the side of the middle-deep layer geothermal heat source, widens the application field of the middle-deep layer geothermal heat, and ensures that the heat pump unit has high energy efficiency ratio and stable and safe operation under different working conditions. The efficient heat pump unit for cascade utilization of the middle-deep layer ground rock heat can supply water for graded heat exchange of the middle-deep layer ground rock heat with a large temperature change range, cascade utilization is realized, and the evaporator side of the ground rock heat pump system has stable water inlet temperature, so that the efficient heat pump unit has higher energy efficiency ratio and more obvious energy-saving effect.
Description
Technical Field
The utility model belongs to the technical field of heat exchange of middle-deep layer ground rock heat, and particularly relates to a high-efficiency heat pump unit for cascade utilization of middle-deep layer ground rock heat.
Background
The medium-deep geothermal technology is used as one of the main modes of geothermal energy development and utilization, and is more and more widely applied. The medium-deep geothermal technology is characterized in that a geothermal heat exchanger is arranged in 2000-3000 m underground, heat is taken from a medium-deep rock layer in the underground, and then heat is supplied to a building or a tail end by a ground special equipment system, so that the energy requirements of people on heating, hot water and the like are met, and the geothermal heat pump unit is one of core components of the technology and has the effects of mainly heating circulating hot water in the geothermal heat exchanger and being used for building heating and the like.
The temperature of circulating water in the middle-deep geothermal heat exchanger is influenced by a plurality of factors, the temperature variation range is larger, the average temperature is in the range of 60-20 ℃, the temperature can reach 60 ℃ at the initial stage of heat supply, the average water supply in the middle stage of heat supply can be about 20 ℃, the optimal water inlet temperature of the refrigeration working medium used by the conventional heat pump unit is about 20 ℃, the geothermal water supply with larger variation range can influence the normal operation of the geothermal heat pump host, and the safety and stability of the heat pump unit under different working conditions are ensured, so that the safety and stability of the heat pump unit are ensured.
Disclosure of Invention
The utility model aims to solve the technical problems of the prior art, and provides the efficient heat pump unit for cascade utilization of the medium-deep geothermal heat, which can be fully adapted to the working condition with a large water supply temperature change range at the side of the medium-deep geothermal heat source, widens the application field of the medium-deep geothermal heat and ensures that the heat pump unit has higher energy efficiency ratio and stable and safe operation under different working conditions.
In order to achieve the purpose, the technical scheme adopted by the utility model is that the high-efficiency heat pump unit for cascade utilization of the geothermal heat of the middle-deep layer comprises a geothermal heat pump system and a first heat exchange system;
The ground rock heat pump system comprises an evaporator, a compressor, a condenser and a throttle valve which are connected in sequence in a loop, wherein working media exist in the loop; the water outlet of the condenser is connected with the water inlet of the user side water supply pipe, and the water inlet of the condenser is connected with the water outlet of the user side water return pipe;
The first heat exchange system comprises a first heat exchange water tank and a second heat exchange water tank, wherein heat exchange coils are arranged in the first heat exchange water tank and the second heat exchange water tank, a water inlet of each heat exchange coil in the first heat exchange water tank is connected with a water outlet end of a medium-deep layer ground rock hot water supply pipe through a first water inlet branch pipe, a water inlet of each heat exchange coil in the second heat exchange water tank is connected with a water outlet end of the medium-deep layer ground rock hot return pipe through a second water inlet branch pipe, a water outlet of each heat exchange coil in the second heat exchange water tank is connected with a water inlet end of the medium-deep layer ground rock hot return pipe through a second water outlet branch pipe, a heat exchange water outlet of each heat exchange water tank is connected with a first circulating water supply branch pipe, a heat exchange water inlet of each heat exchange water tank is connected with a second circulating water supply branch pipe, each first circulating water supply branch pipe and each second circulating water supply pipe is connected with a water inlet end of a circulating water supply pipe, and each circulating water return pipe is connected with a water outlet end of an evaporation water return pipe.
Further, a first circulating pump is arranged on the circulating water supply pipe.
Further, a second circulating pump is arranged on the middle-deep geothermal water supply pipe.
Further, a third circulating pump is arranged on the user side water return pipe.
Further, the first water inlet branch pipe, the second water inlet branch pipe, the first circulating backwater branch pipe, the second circulating backwater branch pipe, the first circulating water supply branch pipe and the second circulating water supply branch pipe are respectively provided with a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve.
Further, the middle-deep layer geothermal water supply pipe is connected with the water inlet end of the circulating water supply pipe through a third circulating water supply branch pipe, the water outlet end of the circulating water return pipe is connected with the middle-deep layer geothermal water return pipe through a third circulating water return branch pipe, and a second valve and a third valve are respectively arranged on the third circulating water return branch pipe and the third circulating water supply branch pipe.
Further, a first valve is arranged on the middle-deep geothermal water supply pipe, and a tenth valve is arranged on the user side water return pipe.
Further, the system also comprises a second heat exchange system, the second heat exchange system comprises a heat exchanger, a geothermal side water inlet, a geothermal side water outlet, a user side water inlet and a user side water outlet are arranged on the heat exchanger, the first valve and the tenth valve are three-way valves, one water outlet of the first valve is connected with the geothermal side water inlet through a pipeline, the geothermal side water outlet is connected with a middle-deep geothermal water supply pipe water outlet end through a pipeline, one outlet of the tenth valve is connected with the user side water inlet through a pipeline, and the user side water outlet is connected with the user side water return pipe water outlet through a pipeline.
Compared with the prior art, the utility model has the beneficial technical effects that:
(1) The efficient heat pump unit utilizing the gradient utilization of the middle-deep layer geothermal heat can be completely suitable for the working condition of large water supply temperature change range of the side of the middle-deep layer geothermal heat source, widens the application field of the middle-deep layer geothermal heat, and ensures that the heat pump unit has high energy efficiency ratio and stable and safe operation under different working conditions.
(2) The efficient heat pump unit for cascade utilization of the middle-deep layer ground rock heat can supply water for graded heat exchange of the middle-deep layer ground rock heat with a large temperature change range, cascade utilization is realized, and the evaporator side of the ground rock heat pump system has stable water inlet temperature, so that the efficient heat pump unit has higher energy efficiency ratio and more obvious energy-saving effect.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
Reference numerals: 1-first valve, 2-second valve, 3-third valve, 41-fourth valve, 42-fifth valve, 51-sixth valve, 52-seventh valve, 61-eighth valve, 62-ninth valve, 71-first heat exchange water tank, 72-second heat exchange water tank, 8-first circulating pump, 9-heat exchanger, 10-tenth valve, 11-evaporator, 12-compressor, 13-condenser, 14-throttle valve, 15-second circulating pump, 16-third circulating pump.
Detailed Description
The utility model will be further described in detail by means of preferred embodiments in order to make the objects, technical solutions and advantages of the utility model more apparent.
Example 1
As shown in fig. 1, the efficient heat pump unit for gradient utilization of the geothermal heat of the middle-deep layer provided by the embodiment comprises a geothermal heat pump system and a first heat exchange system; the ground rock heat pump system comprises an evaporator 11, a compressor 12, a condenser 13 and a throttle valve 14 which are connected in sequence in a loop, wherein working media exist in the loop; the water outlet of the condenser 13 is connected with the water inlet of the user side water supply pipe, and the water inlet of the condenser 13 is connected with the water outlet of the user side water return pipe.
Specifically, the first heat exchange system includes a first heat exchange water tank 71 and a second heat exchange water tank 72, heat exchange coils are all disposed in the first heat exchange water tank 71 and the second heat exchange water tank 72, a water inlet of the heat exchange coils in the first heat exchange water tank 71 is connected with a water outlet end of a medium deep layer ground rock hot water supply pipe through a first water inlet branch pipe, a water inlet of the heat exchange coils in the second heat exchange water tank 72 is connected with a water outlet end of the medium deep layer ground rock hot water return pipe through a second water inlet branch pipe, a water outlet of the heat exchange coils in the second heat exchange water tank 72 is connected with a water inlet end of the medium deep layer ground rock hot water return pipe through a second water outlet branch pipe, a heat exchange water outlet of the first heat exchange water tank 71 is connected with a first circulating water return branch pipe, a heat exchange water outlet of the second heat exchange water tank 72 is connected with a second circulating water return branch pipe, a first circulating water supply pipe and a second circulating water return pipe are connected with a circulating water inlet end, a second circulating water return pipe is connected with a water outlet end 11, and a water inlet of the second heat exchange water return pipe is connected with an evaporation end 11.
Specifically, the circulating water supply pipe is provided with a first circulating pump 8, the deep-layer geothermal water supply pipe is provided with a second circulating pump 15, and the user side water return pipe is provided with a third circulating pump 16; the first water inlet branch pipe, the second water inlet branch pipe, the first circulating backwater branch pipe, the second circulating backwater branch pipe, the first circulating water supply branch pipe and the second circulating water supply branch pipe are respectively provided with a fourth valve 41, a fifth valve 42, a sixth valve 51, a seventh valve 52, an eighth valve 61 and a ninth valve 62.
The fourth valve 41, the fifth valve 42, the sixth valve 51, the seventh valve 52, the eighth valve 61, and the ninth valve 62 of the present embodiment are all electrically operated valves.
Example 2
On the basis of embodiment 1, the middle-deep layer geothermal water supply pipe is connected with the water inlet end of the circulating water supply pipe through a third circulating water supply branch pipe, the water outlet end of the circulating water return pipe is connected with the middle-deep layer geothermal water return pipe through a third circulating water return branch pipe, and a second valve 2 and a third valve 3 are respectively arranged on the third circulating water return branch pipe and the third circulating water supply branch pipe.
The second valve 2 and the third valve 3 in this embodiment are all electric valves.
Example 3
On the basis of embodiment 2, the first valve 1 is arranged on the middle-deep layer geothermal water supply pipe, and the tenth valve 10 is arranged on the user side water return pipe.
The system comprises a first heat exchange system, and is characterized by further comprising a first heat exchange system, wherein the first heat exchange system comprises a heat exchanger 9, a geothermal side water inlet, a geothermal side water outlet, a user side water inlet and a user side water outlet are arranged on the heat exchanger 9, the first valve 1 and the tenth valve 10 are three-way valves, one water outlet of the first valve 1 is connected with the geothermal side water inlet through a pipeline, the geothermal side water outlet is connected with a middle-deep geothermal water supply pipe water outlet end through a pipeline, one outlet of the tenth valve 10 is connected with the user side water inlet through a pipeline, and the user side water outlet is connected with a user side water return pipe water outlet through a pipeline.
The first valve 1 and the tenth valve 10 in this embodiment are all electric valves, and the shell-and-tube heat exchanger 9 is selected as the heat exchanger 9.
The utility model relates to a working principle and a control method of a high-efficiency heat pump unit for cascade utilization of medium-deep geothermal heat, which comprise the following steps:
(1) When the water outlet temperature of the middle-deep layer geothermal water supply pipe is higher than 40 ℃, the second valve 2 and the third valve 3 are closed, and the first valve 1 and the tenth valve 10 are opened, so that the middle-deep layer geothermal water supply pipe conveys high Wen Deyan hot water to exchange heat with return water of a user side through the heat exchanger 9; if the heat exchange temperature difference is set to be 10 ℃, the geothermal water supply temperature higher than 50 ℃ can be reduced to about 40 ℃. The geothermal hot water with reduced temperature enters the first heat exchange water tank 71 or the second heat exchange water tank 72 for heat exchange, the temperature is further reduced, the geothermal hot water can be controlled to be switched between the first heat exchange water tank 71 and the second heat exchange water tank 72 through the fourth valve 41 and the fifth valve 42, the temperature of circulating water in the first heat exchange water tank 71 or the second heat exchange water tank 72 is kept between 20 ℃ and 30 ℃, and the low-temperature geothermal hot water after heat exchange with the first heat exchange water tank 71 or the second heat exchange water tank 72 is re-entered into the deep geothermal heat exchanger 9 for heating.
(2) When the outlet water temperature of the deep geothermal water supply pipe is 30-40 ℃, the flow directions of the first valve 1 and the tenth valve 10 are switched, so that geothermal hot water of the deep geothermal water supply pipe enters the first heat exchange water tank 71 or the second heat exchange water tank 72 through the fourth valve 41 or the fifth valve 42 to exchange heat, when the circulating water in the first heat exchange water tank 71 or the second heat exchange water tank 72 is lower than 20 ℃, the geothermal hot water is utilized to heat the first heat exchange water tank 71 or the second heat exchange water tank 72, and when the first heat exchange water tank 71 is added, the fourth valve 41 is opened, and the fifth valve 42, the sixth valve 51 and the eighth valve 61 are all closed; when the second heat exchange water tank 72 is added, the fifth valve 42 is opened, and the fourth valve 41, the seventh valve 52 and the ninth valve 62 are closed. When the temperature of the circulating water in the first heat exchange water tank 71 or the second heat exchange water tank 72 is higher than 30 ℃, stopping heating the water tank, and enabling the circulating water in the water tank to enter the evaporator 11 for heat exchange through the first circulating pump 8, when the circulating water in the first heat exchange water tank 71 enters the evaporator 11 for heat exchange, opening the sixth valve 51 and the eighth valve 61, and when the circulating water in the second heat exchange water tank 72 enters the evaporator 11 for heat exchange, opening the seventh valve 52 and the ninth valve 62; the switching of the heating and heat exchange of the first heat exchange water tank 71 and the second heat exchange water tank 72 is realized by controlling the opening and closing of the fourth valve 41, the fifth valve 42, the sixth valve 51, the seventh valve 52, the eighth valve 61 and the ninth valve 62.
(3) When the outlet temperature of the deep geothermal water supply pipe is lower than 30 ℃, the first valve 1, the second valve 2, the third valve 3 and the tenth valve 10 are kept open, the fourth valve 41, the fifth valve 42, the sixth valve 51, the seventh valve 52, the eighth valve 61 and the ninth valve 62 are all closed, and the circulation pump 8 stops running, so that the geothermal hot water conveyed by the deep geothermal water supply pipe directly enters the evaporator 11 for heat exchange.
(4) The working medium in the evaporator 11 after heat exchange with the geothermal hot water becomes a low-temperature low-pressure gas state, enters the compressor 12 and is compressed into a high-temperature high-pressure gas state, enters the condenser 13 to exchange heat with the user-side backwater, heats the user-side backwater into user-side water supply to enter the user-side heat supply, the working medium in the condenser 13 is cooled into the low-temperature low-pressure gas state by the user-side backwater, is further cooled into the low-temperature low-pressure liquid state by the throttle valve 14, and reenters the evaporator 11 to exchange heat.
The foregoing description of the preferred embodiments of the utility model has been presented for the purpose of illustration and description, and it will be apparent to those skilled in the art that various changes, substitutions and alterations can be made therein without departing from the spirit and principles of the utility model.
Claims (8)
1. The utility model provides a high-efficient heat pump set of middle-deep layer geothermal ground rock heat cascade utilization which characterized in that: the system comprises a ground rock heat pump system and a first heat exchange system;
The ground rock heat pump system comprises an evaporator, a compressor, a condenser and a throttle valve which are connected in sequence in a loop, wherein working media exist in the loop; the water outlet of the condenser is connected with the water inlet of the user side water supply pipe, and the water inlet of the condenser is connected with the water outlet of the user side water return pipe;
The first heat exchange system comprises a first heat exchange water tank and a second heat exchange water tank, wherein heat exchange coils are arranged in the first heat exchange water tank and the second heat exchange water tank, a water inlet of each heat exchange coil in the first heat exchange water tank is connected with a water outlet end of a medium-deep layer ground rock hot water supply pipe through a first water inlet branch pipe, a water inlet of each heat exchange coil in the second heat exchange water tank is connected with a water outlet end of the medium-deep layer ground rock hot return pipe through a second water inlet branch pipe, a water outlet of each heat exchange coil in the second heat exchange water tank is connected with a water inlet end of the medium-deep layer ground rock hot return pipe through a second water outlet branch pipe, a heat exchange water outlet of each heat exchange water tank is connected with a first circulating water supply branch pipe, a heat exchange water inlet of each heat exchange water tank is connected with a second circulating water supply branch pipe, each first circulating water supply branch pipe and each second circulating water supply pipe is connected with a water inlet end of a circulating water supply pipe, and each circulating water return pipe is connected with a water outlet end of an evaporation water return pipe.
2. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 1, wherein the efficient heat pump unit is characterized in that: and the circulating water supply pipe is provided with a first circulating pump.
3. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 1, wherein the efficient heat pump unit is characterized in that: and a second circulating pump is arranged on the middle-deep layer geothermal water supply pipe.
4. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 1, wherein the efficient heat pump unit is characterized in that: and a third circulating pump is arranged on the user side water return pipe.
5. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 1, wherein the efficient heat pump unit is characterized in that: the first water inlet branch pipe, the second water inlet branch pipe, the first circulating backwater branch pipe, the second circulating backwater branch pipe, the first circulating water supply branch pipe and the second circulating water supply branch pipe are respectively provided with a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve.
6. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 1, wherein the efficient heat pump unit is characterized in that: the middle-deep layer geothermal water supply pipe is connected with the water inlet end of the circulating water supply pipe through a third circulating water supply branch pipe, the water outlet end of the circulating water return pipe is connected with the middle-deep layer geothermal water return pipe through a third circulating water return branch pipe, and a second valve and a third valve are respectively arranged on the third circulating water return branch pipe and the third circulating water supply branch pipe.
7. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 1, wherein the efficient heat pump unit is characterized in that: the middle-deep layer geothermal water supply pipe is provided with a first valve, and the user side water return pipe is provided with a tenth valve.
8. The efficient heat pump unit for cascade utilization of medium-deep geothermal rock heat according to claim 7, wherein: the system comprises a first heat exchange system, and is characterized by further comprising a second heat exchange system, wherein the second heat exchange system comprises a heat exchanger, a geothermal side water inlet, a geothermal side water outlet, a user side water inlet and a user side water outlet are arranged on the heat exchanger, the first valve and the tenth valve are three-way valves, one water outlet of the first valve is connected with the geothermal side water inlet through a pipeline, the geothermal side water outlet is connected with a middle-deep geothermal water supply pipe water outlet end through a pipeline, one outlet of the tenth valve is connected with the user side water inlet through a pipeline, and the user side water outlet is connected with a user side water return pipe water outlet through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322636229.1U CN220958984U (en) | 2023-09-27 | 2023-09-27 | Efficient heat pump unit for gradient utilization of middle-deep geothermal rock heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322636229.1U CN220958984U (en) | 2023-09-27 | 2023-09-27 | Efficient heat pump unit for gradient utilization of middle-deep geothermal rock heat |
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| CN220958984U true CN220958984U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322636229.1U Active CN220958984U (en) | 2023-09-27 | 2023-09-27 | Efficient heat pump unit for gradient utilization of middle-deep geothermal rock heat |
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| Country | Link |
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| CN (1) | CN220958984U (en) |
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2023
- 2023-09-27 CN CN202322636229.1U patent/CN220958984U/en active Active
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