CN218915073U - Novel ground source heat pump and phase change heat storage composite heating system - Google Patents
Novel ground source heat pump and phase change heat storage composite heating system Download PDFInfo
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- CN218915073U CN218915073U CN202223134304.6U CN202223134304U CN218915073U CN 218915073 U CN218915073 U CN 218915073U CN 202223134304 U CN202223134304 U CN 202223134304U CN 218915073 U CN218915073 U CN 218915073U
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Abstract
The utility model discloses a novel ground source heat pump and phase change heat storage composite heating system, relates to the technical field of air conditioning systems, solves the problem of unstable heat supply of the existing solar energy and ground source heat pump composite system, reduces the electricity cost, and adopts the following specific scheme: the system comprises an electric heating water tank, a phase-change heat storage water tank and a ground source heat pump mechanism, wherein the electric heating water tank is connected with a user side through a first circulation pipeline, and is connected with a water inlet pipe and a water outlet pipe of the phase-change heat storage water tank through a second circulation pipeline so as to be used for auxiliary heating in peak electricity time periods; the water inlet pipe and the water outlet pipe of the phase change heat storage water tank are connected with the ground source heat pump mechanism through a third circulating pipeline so as to be used for heat storage in a valley period; the ground source heat pump mechanism is connected with the user side through a third circulating pipeline branch for supplying heat in a flat period, valves are arranged on a water inlet pipe and a water outlet pipe of the phase change heat storage water tank, and the first circulating pipeline, the second circulating pipeline, the third circulating pipeline and the third circulating pipeline branch are provided with valves and a water pump.
Description
Technical Field
The utility model relates to the technical field of air conditioning systems, in particular to a novel ground source heat pump and phase change heat storage composite heating system.
Background
The ground source heat pump is a high-efficiency energy-saving environment-friendly air conditioning system for realizing heat supply and refrigeration by utilizing underground energy. The main operation control method of the ground source heat pump air conditioning system at the present stage adjusts the capacity of the heat pump unit according to the indoor load, the peak-valley electricity price policy of the power grid is not fully utilized, and the operation cost is too high.
The inventor finds that in order to solve the problem of high operation cost of the ground source heat pump at present, a solar auxiliary ground source heat pump is adopted, but the solar auxiliary system has high requirements on the building (such as energy-saving glass of the building, large enough area for placing a heat collector on the sunny side and the like) and high requirements on the pipeline (such as the characteristics of high temperature resistance, heat preservation, corrosion resistance, flame resistance and the like are required), so that the use cost is greatly increased; and the solar auxiliary system is easily influenced by external environment conditions (illumination and the like), so that the auxiliary work of the solar auxiliary system is unstable, and sometimes the solar auxiliary system is assisted by utilizing the ground source heat pump in the time period of the shutdown of the ground source heat pump, so that the problem of high operation cost of the ground source heat pump is not solved to the greatest extent.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a novel ground source heat pump and phase change heat storage composite heating system, which is provided with an electric heating water tank and a phase change heat storage water tank, and utilizes the phase change heat storage water tank to store heat energy of a ground source heat pump mechanism in a valley period and utilizes the phase change heat storage water tank and the electric heating water tank to supply heat in a peak period, so that the problems of high cost and unstable heat supply of the existing solar energy and ground source heat pump composite heating system are solved.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
in a first aspect, an embodiment of the utility model provides a novel ground source heat pump and phase change heat storage composite heating system, which comprises an electric heating water tank, a phase change heat storage water tank and a ground source heat pump mechanism, wherein the electric heating water tank is connected with a user side through a first circulation pipeline, and is connected with a water inlet pipe and a water outlet pipe of the phase change heat storage water tank through a second circulation pipeline so as to be used for auxiliary heating in peak electricity time periods; the water inlet pipe and the water outlet pipe of the phase change heat storage water tank are connected with the ground source heat pump mechanism through a third circulating pipeline so as to be used for heat storage in a valley period; the ground source heat pump mechanism is connected with the user side through a third circulating pipeline branch for supplying heat in a flat period, valves are arranged on a water inlet pipe and a water outlet pipe of the phase change heat storage water tank, and the first circulating pipeline, the second circulating pipeline, the third circulating pipeline and the third circulating pipeline branch are provided with valves and a water pump.
As a further implementation mode, the ground source heat pump mechanism consists of a ground source heat pump unit and a ground buried pipe heat exchanger, wherein the ground source heat pump unit is connected with the ground buried pipe heat exchanger through a fourth circulating pipeline, and the ground buried pipe heat exchanger is positioned in an underground medium below the ground.
As a further implementation mode, the ground source heat pump unit is connected with the water inlet pipe and the water outlet pipe of the phase change heat storage water tank through a third circulation pipeline, and the ground source heat pump unit is connected with the user side through a third circulation pipeline branch.
As a further implementation manner, a ninth valve and a tenth valve are arranged on the third circulation pipeline branch, the ninth valve is located on a pipeline of the third circulation pipeline branch for supplying water to the user end, and the tenth valve is located on a pipeline of the third circulation pipeline branch for supplying water to the ground source heat pump unit.
As a further implementation mode, the first circulating pipeline is provided with a first valve, a second valve and a first water pump, the first valve and the first water pump are arranged on the water inlet side of the electric heating water tank, and the second valve is arranged on the water outlet side of the electric heating water tank.
As a further implementation mode, a fourth valve, a fifth valve, a sixth valve and a second water pump are arranged on the second circulation pipeline, the fourth valve is arranged on the water outlet side of the phase-change heat storage water tank, and the fifth valve, the second water pump and the sixth valve are sequentially arranged on the water inlet side of the phase-change heat storage water tank.
As a further implementation mode, a seventh valve is arranged on the water inlet pipe of the phase-change heat storage water tank, and a third valve is arranged on the water outlet pipe.
As a further implementation mode, an eighth valve is arranged on a pipeline connected with the water inlet pipe of the phase-change heat storage water tank, and the pipeline provided with the eighth valve is positioned between the sixth valve and the seventh valve.
As a further implementation manner, a coiled electric heating structure is arranged inside the electric heating water tank.
As a further implementation manner, the phase change heat storage water tank is filled with a phase change medium.
The beneficial effects of the utility model are as follows:
the utility model sets the electric heating water tank and the phase change heat storage water tank for assisting the heat supply of the ground source heat pump mechanism, stores the heat energy of the ground source heat pump mechanism in the valley period by utilizing the phase change heat storage water tank, supplies heat by utilizing the phase change heat storage water tank and the electric heating water tank in the peak period, and uses the geothermal mechanism for directly supplying heat in the flat period.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic diagram of the overall structure of a novel ground source heat pump + phase change thermal storage hybrid heating system in accordance with one or more embodiments of the present utility model;
in the figure: the mutual spacing or size is exaggerated for showing the positions of all parts, and the schematic drawings are used only for illustration;
wherein, 1, an electric heating water tank; 2. a phase change heat storage water tank; 3. a ground source heat pump unit; 4. a buried pipe heat exchanger; 5. a first water pump; 6. a second water pump; 7. a third water pump; 8. a fourth water pump; 9. a first valve; 10. a second valve; 11. a third valve; 12. a fourth valve; 13. a fifth valve; 14. a sixth valve; 15. a seventh valve; 16. an eighth valve; 17. a ninth valve; 18. a tenth valve; 19. and a user terminal.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
As introduced by the background technology, the solar auxiliary system has high requirements on buildings and pipelines, and the use cost is greatly increased; the solar auxiliary system is easily influenced by external environmental conditions, so that the auxiliary work of the solar auxiliary system is unstable, the solar auxiliary system is assisted by the ground source heat pump in a time period when the ground source heat pump is required to stop, the problem of high operation cost of the ground source heat pump is not solved to the greatest extent, and the novel ground source heat pump and phase change heat storage composite heating system is provided for solving the problem.
Example 1
In a typical embodiment of the present utility model, as shown in fig. 1, a novel ground source heat pump+phase change heat storage composite heating system is provided, which comprises an electric heating water tank 1, a phase change heat storage water tank 2 and a ground source heat pump mechanism, wherein the ground source heat pump mechanism is composed of a ground source heat pump unit 3 and a ground buried pipe heat exchanger 4, the electric heating water tank 1, the phase change heat storage water tank 2, the ground source heat pump unit 3 and the ground buried pipe heat exchanger 4 are arranged in parallel, the electric heating water tank 1 and the ground source heat pump unit 3 are respectively connected with a user terminal 19 (i.e. building terminal equipment) through a circulation pipeline, and adjacent equipment is also connected through the circulation pipeline.
Wherein, a coiled electric heating structure, such as coiled electric heating pipe, is arranged in the electric heating water tank 1 to realize electric heating of the water body; the phase-change heat storage water tank 2 is filled with a phase-change medium (paraffin 42#) to store and release heat energy, and for the phase-change medium in the phase-change heat storage water tank 2, the overall temperature of the medium is kept constant during phase change, and the medium has the characteristic of large phase-change latent heat, so that a large amount of heat can be stored and stable heat release is realized.
Specifically, the electric heating water tank 1 is connected with the user terminal 19 through a first circulation pipeline, a first valve 9, a second valve 10 and a first water pump 5 are arranged on the first circulation pipeline, wherein the first valve 9 and the first water pump 5 are arranged on the water inlet side of the electric heating water tank 1, and the second valve 10 is arranged on the water outlet side of the electric heating water tank 1, so that the electric heating water tank 1 can provide hot water with set temperature for the user terminal 19 through the first circulation pipeline.
The phase-change heat storage water tank 2 is provided with a water inlet pipe and a water outlet pipe, a seventh valve 15 is arranged on the water inlet pipe, a third valve 11 is arranged on the water outlet pipe, and the water inlet pipe and the water outlet pipe of the phase-change heat storage water tank 2 are connected with the electric heating water tank 1 through a second circulation pipeline.
The second circulation pipeline is provided with a fourth valve 12, a fifth valve 13, a sixth valve 14 and a second water pump 6;
the fourth valve 12 is arranged on a pipeline between the water outlet side of the phase-change heat storage water tank 2 and the water inlet side of the electric heating water tank 1, and the fifth valve 13, the second water pump 6 and the sixth valve 14 are sequentially arranged on a pipeline between the water inlet side of the phase-change heat storage water tank 2 and the water outlet side of the electric heating water tank 1.
When heat exchange is performed, hot water in the phase-change heat storage water tank 2 can enter the electric heating water tank 1 through the third valve 11 and the fourth valve 12 in sequence, so that the hot water exchanges heat with water in the electric heating water tank 1, and cold water after heat exchange is returned to the phase-change heat storage water tank 2 through the fifth valve 13, the second water pump 6, the sixth valve 14 and the seventh valve 15 in sequence, and is heated again.
The phase-change heat storage water tank 2 is connected with the ground source heat pump unit 3 through a third circulation pipeline, the third circulation pipeline is also connected with a water inlet pipe and a water outlet pipe on the phase-change heat storage water tank 2, the third circulation pipeline is provided with a third water pump 7 and an eighth valve 16, wherein the eighth valve 16 is positioned between the sixth valve 14 and the seventh valve 15, and a pipeline provided with the eighth valve 16 is particularly arranged between the sixth valve 14 and the seventh valve 15.
The ground source heat pump unit 3 is connected with the ground buried pipe heat exchanger 4 through a fourth circulating pipeline to form a circulating system, the ground buried pipe heat exchanger 4 is positioned in an underground medium below the ground, and a fourth water pump 8 is arranged on the fourth circulating pipeline to realize circulation of the medium between the ground source heat pump unit 3 and the ground buried pipe heat exchanger 4.
The third circulation pipeline is also provided with a third circulation pipeline branch, the ground source heat pump unit 3 is also connected with the user end 19 through the third circulation pipeline branch, and the third circulation pipeline branch is provided with a ninth valve 17 and a tenth valve 18;
the third circulation pipeline branch is communicated with the first circulation pipeline, the ninth valve 17 is located on a pipeline of the third circulation pipeline branch for supplying water to the user end 19, and the tenth valve 18 is located on a pipeline of the third circulation pipeline branch for supplying water to the ground source heat pump unit 3.
The specific working principle is as follows:
the three operation modes of the composite heating system are a heat storage mode, a heat release mode and a normal operation mode respectively, and different operation modes are controlled by different valves and the switch of the water pump.
In the heat release mode, when the internal temperature of the phase-change heat storage water tank 2 is higher than 40 ℃, a thermometer is arranged in the electric heating water tank 1, the water temperature flowing into the electric heating water tank 1 from the phase-change heat storage water tank 2 is monitored, and when the water temperature is lower than 42 ℃, the electric heating water tank is started to supplement heat to the hot water flowing out of the phase-change heat storage water tank 2 so that the stable heating temperature is achieved.
Specific:
(1) Thermal storage mode
Because the electricity price in the valley electricity time period is low, and the effect of converting the electricity quantity of the ground source heat pump unit 3 into heat quantity is far greater than that of the electric heating water tank 1 (the ratio of converting the electricity quantity of the ground source heat pump unit 3 into heat quantity is 1:4-5, and the electric heating water tank 1 is 1:1), the phase change heat storage water tank 2 is stored by the ground source heat pump unit 3 in the valley electricity time period, so that the heat quantity stored in the phase change heat storage water tank 2 can meet the heat release requirement of daytime working time.
The phase-change heat storage water tank 2 is internally provided with a thermometer, in a heat storage mode, when the internal temperature of the phase-change heat storage water tank 2 is lower than a set temperature (the set temperature is 40 ℃ in the embodiment), heat storage is started, when the temperature reaches more than 44 ℃, heat storage is stopped, and in the mode, if the temperature of the phase-change heat storage water tank 2 is lower than 40 ℃ due to external heat radiation, the ground source heat pump unit 3 is started again to store the heat of the phase-change heat storage water tank 2.
Specifically, during operation, the seventh valve 15, the eighth valve 16 and the third valve 11 are opened, the rest valves are closed, the third water pump 7 and the fourth water pump 8 are simultaneously opened, the rest water pumps are closed, and the ground source heat pump unit 3 is simultaneously opened;
in the valley period and when the internal temperature of the phase-change heat storage water tank 2 is lower than 40 ℃, circulating water reaches the phase-change heat storage water tank 2 through the third water pump 7 and the third valve 11, and returns to the ground source heat pump unit 3 through the seventh valve 15 and the eighth valve 16 to store heat;
when the internal temperature of the phase-change heat storage water tank 2 reaches more than 44 ℃, heat storage is stopped, and when the temperature of the phase-change heat storage water tank 2 is lower than 40 ℃ due to external heat dissipation in the valley period, the ground source heat pump unit 3 is started again to store the heat of the phase-change heat storage water tank 2.
(2) Exothermic mode
Because peak electricity time period electricity price is high, therefore, peak electricity time period utilizes phase change heat storage water tank 2 exothermic to satisfy the heating demand, is full of phase change medium (paraffin 42 #) in the phase change heat storage water tank 2, and medium overall temperature remains invariable during the phase change, and this medium has the characteristics that phase change latent heat is big, can store a large amount of heat and realize steady exothermic, opens electric heat water tank 1 and carries out the heat filling in order to obtain stable hot water simultaneously in the exothermic of phase change heat storage water tank 2.
Because the heat source mainly comes from the phase change heat storage water tank 2, the electric heating water tank 1 only plays the role of auxiliary heating to ensure the stability of the heat source, and the electric consumption of the electric heating water tank 1 is lower compared with that of restarting the ground source heat pump unit 3, so that the auxiliary heating cost of the electric heating water tank 1 is lower in the peak power time period.
Specifically, in operation, the first valve 9, the second valve 10, the third valve 11, the fourth valve 12, the fifth valve 13, the sixth valve 14 and the seventh valve 15 are opened, the rest valves are closed, the first water pump 5 and the second water pump 6 are simultaneously opened, the rest water pumps are closed, and the ground source heat pump unit 3 is simultaneously closed;
in the peak electricity period and when the internal temperature of the phase-change heat storage water tank 2 is higher than 40 ℃, circulating water in the phase-change heat storage water tank 2 reaches the electric heating water tank 1 through the third valve 11 and the fourth valve 12, exchanges heat with water in the electric heating water tank 1 and returns to the phase-change heat storage water tank 2 through the fifth valve 13, the sixth valve 14 and the seventh valve 15, and meanwhile, water in the electric heating water tank 1 reaches the user end 19 through the second valve 10 and returns to the electric heating water tank 1 through the first valve 9 and the first water pump 5;
meanwhile, the water temperature flowing into the electric heating water tank 1 from the phase-change heat storage water tank 2 is monitored, and when the water temperature is lower than 42 ℃, the electric heating of the water tank is started to supplement the heat of the hot water flowing out of the phase-change heat storage water tank 1 so as to enable the hot water to reach a stable heating temperature.
(3) Flat period mode of operation
The flat period has moderate electricity price and large heat consumption, so that the ground source heat pump unit 3 bears the whole load when the ground source heat pump unit is operated for heating in the flat period.
When the system is operated, the ninth valve 17 and the tenth valve 18 are opened, the rest valves are closed, the third water pump 7 and the fourth water pump 8 are simultaneously opened, the rest water pumps are closed, the ground source heat pump unit 3 is simultaneously opened, and the rated water outlet temperature of the unit is 45 ℃; the circulating water in the ordinary period reaches the user end 19 through the third water pump 7 and the ninth valve 17, and then returns to the ground source heat pump unit 3 through the tenth valve 18 to supply heat independently, at the moment, the electric heating water tank 1 is in a closed state, and the water body returning to the ground source heat pump unit 3 flows back to the ground buried pipe heat exchanger 4 through the fourth water pump 8 to exchange heat again.
The peak-valley electricity price difference is utilized, heat is stored in the valley electricity period, heat is released in the peak electricity period, different heat exchange mechanisms can be selected according to the electricity price and the heat exchange efficiency, the whole system is simple in structure and is little influenced by external environment, and the problem of high operation cost of the ground source heat pump is solved greatly.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The novel ground source heat pump and phase change heat storage composite heating system is characterized by comprising an electric heating water tank, a phase change heat storage water tank and a ground source heat pump mechanism, wherein the electric heating water tank is connected with a user side through a first circulation pipeline, and is connected with a water inlet pipe and a water outlet pipe of the phase change heat storage water tank through a second circulation pipeline so as to be used for auxiliary heating in a peak electricity period; the water inlet pipe and the water outlet pipe of the phase change heat storage water tank are connected with the ground source heat pump mechanism through a third circulating pipeline so as to be used for heat storage in a valley period; the ground source heat pump mechanism is connected with the user side through a third circulating pipeline branch for supplying heat in a flat period, valves are arranged on a water inlet pipe and a water outlet pipe of the phase change heat storage water tank, and the first circulating pipeline, the second circulating pipeline, the third circulating pipeline and the third circulating pipeline branch are provided with valves and a water pump.
2. The novel ground source heat pump and phase change heat storage composite heating system according to claim 1, wherein the ground source heat pump mechanism consists of a ground source heat pump unit and a ground buried pipe heat exchanger, the ground source heat pump unit is connected with the ground buried pipe heat exchanger through a fourth circulation pipeline, and the ground buried pipe heat exchanger is located in an underground medium below the ground.
3. The novel ground source heat pump and phase change heat storage composite heating system according to claim 2, wherein the ground source heat pump unit is connected with a water inlet pipe and a water outlet pipe of the phase change heat storage water tank through a third circulation pipeline, and the ground source heat pump unit is connected with a user side through a third circulation pipeline branch.
4. The novel ground source heat pump and phase change heat storage composite heating system according to claim 3, wherein a ninth valve and a tenth valve are arranged on the third circulation pipeline branch, the ninth valve is located on a pipeline for supplying water to the user side from the third circulation pipeline branch, and the tenth valve is located on a pipeline for supplying water to the ground source heat pump unit from the third circulation pipeline branch.
5. The novel ground source heat pump and phase change heat storage composite heating system according to claim 1, wherein the first circulating pipeline is provided with a first valve, a second valve and a first water pump, the first valve and the first water pump are arranged on the water inlet side of the electric heating water tank, and the second valve is arranged on the water outlet side of the electric heating water tank.
6. The novel ground source heat pump and phase-change heat storage composite heating system according to claim 1, wherein a fourth valve, a fifth valve, a sixth valve and a second water pump are arranged on the second circulation pipeline, the fourth valve is arranged on the water outlet side of the phase-change heat storage water tank, and the fifth valve, the second water pump and the sixth valve are sequentially arranged on the water inlet side of the phase-change heat storage water tank.
7. The novel ground source heat pump and phase change heat storage composite heating system according to claim 6, wherein a seventh valve is arranged on a water inlet pipe of the phase change heat storage water tank, and a third valve is arranged on a water outlet pipe.
8. The novel ground source heat pump and phase change heat storage composite heating system according to claim 7, wherein an eighth valve is arranged on a pipeline connecting a third circulation pipeline and a water inlet pipe of the phase change heat storage water tank, and the pipeline provided with the eighth valve is positioned between the sixth valve and the seventh valve.
9. The novel ground source heat pump and phase change heat storage composite heating system according to claim 1, wherein a coiled electric heating structure is arranged inside the electric heating water tank.
10. The novel ground source heat pump and phase change heat storage composite heating system according to claim 1, wherein the phase change heat storage water tank is filled with a phase change medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223134304.6U CN218915073U (en) | 2022-11-24 | 2022-11-24 | Novel ground source heat pump and phase change heat storage composite heating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223134304.6U CN218915073U (en) | 2022-11-24 | 2022-11-24 | Novel ground source heat pump and phase change heat storage composite heating system |
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| CN218915073U true CN218915073U (en) | 2023-04-25 |
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| CN202223134304.6U Active CN218915073U (en) | 2022-11-24 | 2022-11-24 | Novel ground source heat pump and phase change heat storage composite heating system |
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- 2022-11-24 CN CN202223134304.6U patent/CN218915073U/en active Active
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