Buried pipe ground source heat pump cross-seasonal heat storage and supply system based on soil heat balance

Abstract

The utility model belongs to the technical field of energy storage, heat supply and heat pump systems, and particularly relates to a soil heat balance-based cross-seasonal heat storage and supply system for a buried pipe ground source heat pump. The device is organically composed of a soil energy storage mechanism, a heat pump unit, a plate heat exchanger, a heat user and a waste heat output part. Waste heat generated by combined heat and power generation in summer or waste incineration plants is stored in soil through the buried pipe heat exchanger, heat stored in the soil is extracted through the buried pipe heat exchanger in winter, heat is supplied after being lifted by the heat pump, and balance of storage and taking of soil heat across seasons is achieved. The waste of waste heat in summer is effectively reduced, and carbon emission is reduced. The soil energy storage mechanism, the heat pump unit, the plate heat exchanger, the heat user and the waste heat output part are organically combined simply through pipelines and valves, and cross-seasonal utilization of waste heat is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, heating and heat pump systems, and specifically relates to a trans-seasonal heat storage and heating system of a buried pipe ground source heat pump based on soil thermal balance. Background Art

[0002] In extremely cold and frigid areas, cogeneration or waste incineration plants generate a lot of waste heat in summer. Only a small part of this waste heat is recycled, and most of it is discharged into the air through cooling towers, which causes a lot of energy waste. However, at the same time, heating stations need to consume a lot of coal, electricity, natural gas and other energy sources in winter to provide heat sources for urban heating. Due to the large difference in the cooling and heating loads of cooling and heating in extremely cold and frigid areas, conventional ground source heat pumps have problems such as soil thermal imbalance in technology, which leads to low system energy efficiency. Utility Model Content

[0003] The utility model provides a cross-seasonal heat storage and heating system of a buried pipe ground source heat pump based on soil thermal balance, which aims to provide a system that can fully utilize a large amount of waste heat generated by cogeneration or waste incineration plants in summer to provide sufficient heat source for urban heating, thereby effectively reducing the waste of waste heat in summer and reducing carbon emissions.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance comprises a soil energy storage mechanism, a heat pump unit, a plate heat exchanger, a heat user and a waste heat output unit; the heat pump unit is provided with a hot water input port, a hot water output port, a cold water input port and a cold water output port; the plate heat exchanger is provided with a hot water input port, a hot water output port, a cold water input port and a cold water output port; the heat user is provided with a hot water input port and a return water port; the waste heat output unit is provided with a hot water output port and a cold water input port; the soil energy storage mechanism is provided with a hot inlet and a cold inlet and a cold inlet, the hot inlet and the cold inlet are provided with a tenth butterfly valve, and the cold inlet and the cold inlet are provided with a ninth butterfly valve; the hot water output port of the waste heat output unit is connected to the hot water inlet of the plate heat exchanger The waste heat generating unit is connected through a first pipeline, the cold water input port of the waste heat generating unit is connected to the cold water output port of the plate heat exchanger through a second pipeline; the hot water input port of the heat user is connected to the hot water output port of the heat pump unit through a third pipeline, and the return water port of the heat user is connected to the cold water input port of the heat pump unit through a fourth pipeline; the hot water output port of the plate heat exchanger is connected to the hot inlet and outlet of the soil energy storage mechanism through a fifth pipeline, and the cold water input port of the plate heat exchanger is connected to the cold inlet and outlet of the soil energy storage mechanism through a sixth pipeline; the hot water input port of the heat pump unit is connected to the hot inlet and outlet of the soil energy storage mechanism through a seventh pipeline, and the cold water input port of the heat pump unit is connected to the cold water inlet and outlet of the soil energy storage mechanism through an eighth pipeline.

[0006] The soil energy storage mechanism includes a heat storage area and a cold storage area; the heat storage area and the cold storage area are respectively provided with underground pipe heat exchangers; the underground pipe heat exchanger in the heat storage area is provided with a hot inlet and outlet, and the underground pipe heat exchanger in the cold storage area is provided with a cold inlet and outlet; the underground pipe heat exchanger in the heat storage area is connected with the hot water input port of the heat pump unit and the hot water output port of the plate heat exchanger through the tenth butterfly valve on the hot inlet and outlet; the underground pipe heat exchanger in the cold storage area is connected with the cold water output port of the heat pump unit and the cold water input port of the plate heat exchanger through the ninth butterfly valve on the cold inlet and outlet; the underground pipe heat exchanger in the heat storage area is connected with the underground pipe heat exchanger in the cold storage area through a pipeline, and a first stop valve is connected to the pipeline; a second stop valve is connected to the pipeline connecting the underground pipe heat exchanger in the cold storage area and the ninth butterfly valve.

[0007] The first pipeline includes a pipeline, a seventh butterfly valve and a fourth electric regulating valve; the pipeline is connected between the hot water output port of the waste heat production unit and the hot water input port of the plate heat exchanger; the seventh butterfly valve is connected to the pipeline on the hot water output port side close to the waste heat production unit; the fourth electric regulating valve is connected to the pipeline on the hot water input port side close to the plate heat exchanger.

[0008] The second pipeline includes a pipeline, a fourth water pump, an eighth butterfly valve and a fourth butterfly valve; the pipeline is connected between the cold water inlet of the waste heat production part and the cold water outlet of the plate heat exchanger; the fourth water pump and the eighth butterfly valve are connected on the side close to the cold water inlet of the waste heat production part; the fourth butterfly valve is connected on the side close to the cold water outlet of the plate heat exchanger.

[0009] The third pipeline includes a pipeline, a third water pump, a third butterfly valve and a fifth butterfly valve; the pipeline is connected between the hot water input port of the heat user and the hot water output port of the heat pump unit; the third water pump and the fifth butterfly valve are connected on the hot water input port side close to the heat user, and the third butterfly valve is connected on the hot water output port side close to the heat pump unit.

[0010] The fourth pipeline includes a pipeline, a sixth butterfly valve and a third electric regulating valve; the pipeline is connected between the return water inlet of the heat user and the cold water inlet of the heat pump unit; the sixth butterfly valve is connected to the return water inlet side close to the heat user; the third electric regulating valve is connected to the cold water inlet side close to the heat pump unit.

[0011] The fifth pipeline includes a pipeline and a second butterfly valve; the pipeline is connected between the hot water outlet of the plate heat exchanger and the heat inlet and outlet of the soil energy storage mechanism; the second butterfly valve is connected to the hot water outlet of the plate heat exchanger.

[0012] The sixth pipeline includes a pipeline, a second water pump and a second electric regulating valve; the pipeline is connected between the cold water inlet of the plate heat exchanger and the cold inlet and outlet of the soil energy storage mechanism; the second water pump and the second electric regulating valve are connected to the cold water inlet of the plate heat exchanger.

[0013] The seventh pipeline includes a pipeline, a first water pump and a first electric regulating valve; the pipeline is connected between the hot water input port of the heat pump unit and the heat inlet and outlet of the soil energy storage mechanism; the first water pump and the first electric regulating valve are connected to the hot water input port of the heat pump unit.

[0014] The eighth pipeline includes a pipeline and a first butterfly valve; the pipeline is connected between the cold water inlet of the heat pump unit and the cold water inlet and outlet of the soil energy storage mechanism; the first butterfly valve is connected to the cold water inlet of the heat pump unit.

[0015] Beneficial effects:

[0016] (1) The utility model stores the waste heat generated by cogeneration or waste incineration plants in the soil through a buried pipe heat exchanger in summer, extracts the heat stored in the soil through the buried pipe heat exchanger in winter, and supplies heat after being lifted by a heat pump, thereby achieving a balance in the storage and extraction of soil heat across seasons.

[0017] (2) The utility model effectively reduces the waste of excess heat in summer and reduces carbon emissions.

[0018] (3) The utility model simply combines the soil energy storage mechanism, the heat pump unit, the plate heat exchanger, the heat user and the waste heat output unit through pipelines and valves, thereby realizing the cross-seasonal utilization of waste heat.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the mechanism of the present utility model.

[0022] In the figure: 1. heat pump unit; 2. plate heat exchanger; 3. heat user; 4. waste heat output unit; 5. first water pump; 6. second water pump; 7. third water pump; 8. fourth water pump; 9. first electric regulating valve; 10. first butterfly valve; 11. second butterfly valve; 12. second electric regulating valve; 13. third butterfly valve; 14. third electric regulating valve; 15. fourth electric regulating valve; 16. fourth butterfly valve; 17. fifth butterfly valve; 18. sixth butterfly valve; 19. seventh butterfly valve; 20. eighth butterfly valve; 21. ninth butterfly valve; 22. tenth butterfly valve; 23. first stop valve; 24. second stop valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] according to Figure 1The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil heat balance shown in the figure includes a soil energy storage mechanism, a heat pump unit 1, a plate heat exchanger 2, a heat user 3 and a waste heat output unit 4; the heat pump unit 1 is provided with a hot water input port, a hot water output port, a cold water input port and a cold water output port; the plate heat exchanger 2 is provided with a hot water input port, a hot water output port, a cold water input port and a cold water output port; the heat user 3 is provided with a hot water input port and a return water port; the waste heat output unit 4 is provided with a hot water output port and a cold water input port; the soil energy storage mechanism is provided with a hot inlet and a cold inlet and a cold inlet, the hot inlet and the outlet are provided with a tenth butterfly valve 22, and the cold inlet and the outlet are provided with a ninth butterfly valve 21; the hot water output port of the waste heat output unit 4 is connected to the hot water input port of the plate heat exchanger 2. The outlets are connected by a first pipeline, the cold water input port of the waste heat output part 4 is connected to the cold water output port of the plate heat exchanger 2 by a second pipeline; the hot water input port of the heat user 3 is connected to the hot water output port of the heat pump unit 1 by a third pipeline, and the return water port of the heat user 3 is connected to the cold water input port of the heat pump unit 1 by a fourth pipeline; the hot water output port of the plate heat exchanger 2 is connected to the hot inlet and outlet of the soil energy storage mechanism by a fifth pipeline, and the cold water input port of the plate heat exchanger 2 is connected to the cold inlet and outlet of the soil energy storage mechanism by a sixth pipeline; the hot water input port of the heat pump unit 1 is connected to the hot inlet and outlet of the soil energy storage mechanism by a seventh pipeline, and the cold water input port of the heat pump unit 1 is connected to the cold water inlet and outlet of the soil energy storage mechanism by an eighth pipeline.

[0026] In actual use, the waste heat generated by the waste heat production unit 4 of the cogeneration plant or the waste incineration plant in summer is stored in the soil through the soil energy storage mechanism. In winter, the heat stored in the soil is extracted through the soil energy storage mechanism and the temperature is increased by the heat pump unit 1 to provide heat, thereby achieving a balance in the storage and extraction of soil heat across seasons.

[0027] The utility model effectively reduces the waste of residual heat in summer and reduces carbon emissions.

[0028] Specific:

[0029] In summer heat storage, the waste heat generated by the waste heat output unit 4, such as the cogeneration or waste incineration station, is input into the plate heat exchanger 2 for heat exchange, and then returns to the waste heat output unit 4 for cyclic heat exchange; the hot water exchanged by the plate heat exchanger 2 enters the soil energy storage mechanism, and returns to the plate heat exchanger 2 for cyclic heat exchange after the water temperature drops. This process realizes the storage of waste heat in the soil, reducing waste heat waste. Under this working condition, other pipelines are not connected.

[0030] During winter heating, the heat pump unit 1 stores the cold energy in the soil energy storage mechanism, and then after heat exchange by the soil energy storage mechanism, the temperature is raised and then enters the heat pump unit 1 to further raise the temperature; the hot water raised by the heat pump unit 1 enters the heat user 3 to provide heat for the heat user 3. The return water from the heat user 3 returns to the heat pump unit 1 for circulated heat exchange. Under this working condition, the other pipelines are closed.

[0031] Embodiment 2:

[0032] according to Figure 1 The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance shown in the figure is different from the first embodiment in that: the soil energy storage mechanism includes a hot storage area and a cold storage area; the hot storage area and the cold storage area are respectively provided with a buried pipe heat exchanger; the buried pipe heat exchanger in the hot storage area is provided with a hot inlet and outlet, and the buried pipe heat exchanger in the cold storage area is provided with a cold inlet and outlet; the buried pipe heat exchanger in the hot storage area is respectively connected to the hot water inlet of the heat pump unit 1 through the tenth butterfly valve 22 on the hot inlet and outlet And the hot water output port of the plate heat exchanger 2; the buried pipe heat exchanger in the cold storage area is connected with the cold water output port of the heat pump unit 1 and the cold water input port of the plate heat exchanger 2 through the ninth butterfly valve 21 on the cold inlet and outlet; the buried pipe heat exchanger in the hot storage area is connected with the buried pipe heat exchanger in the cold storage area through a pipeline, and the first stop valve 23 is connected to the pipeline; the second stop valve 24 is connected to the pipeline connecting the buried pipe heat exchanger in the cold storage area and the ninth butterfly valve 21.

[0033] In actual use, in summer, the waste heat generated by the waste heat production unit 4 is stored in the soil through the buried pipe heat exchanger in the heat storage area. In winter, the heat stored in the soil is extracted through the buried pipe heat exchanger, and the temperature is increased by the heat pump unit 1 to provide heat to the heat user 3.

[0034] The details are as follows:

[0035] (1) Summer heat storage

[0036] In summer, the waste heat generated by the waste heat output unit 4 is input to the plate heat exchanger 2 for heat exchange. The hot water exchanged by the plate heat exchanger 2 enters the buried pipe heat exchanger in the heat storage area through the tenth butterfly valve 22, and the heat is stored in the heat storage area of ​​the soil energy storage mechanism. After the water temperature is reduced, it flows into the buried pipe heat exchanger in the cold storage area; after further cooling, it returns to the plate heat exchanger 2 for circulated heat exchange through the second stop valve 24 and the ninth butterfly valve 21. This process realizes the effect of storing waste heat in the heat storage area in the soil and reducing waste heat waste. Under this working condition, the remaining pipelines are closed.

[0037] (2) Winter heating

[0038] In winter, the return water of the heat pump unit 1 flows through the ninth butterfly valve 21 and the second stop valve 24 of the cold storage area, and the cold energy is stored in the soil through the buried pipe heat exchanger in the cold storage area of ​​the soil energy storage mechanism, and then flows through the first stop valve 23 to enter the heat storage area for heat exchange, and after the temperature is increased, it enters the heat pump unit 1 to further increase the temperature; the hot water increased by the heat pump unit 1 enters the heat user 3 to provide heat for the heat user 3; the return water of the heat user 3 returns to the heat pump unit 1 for circulation and heat exchange. Under this working condition, the other pipelines are closed.

[0039] This technology achieves a cross-seasonal balance in soil heat storage and extraction, effectively reducing the waste of summer excess heat and lowering carbon emissions.

[0040] Embodiment three:

[0041] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from the first embodiment in that: the first pipeline includes a pipeline, a seventh butterfly valve 19 and a fourth electric regulating valve 15; the pipeline is connected between the hot water output port of the waste heat production part 4 and the hot water input port of the plate heat exchanger 2; the seventh butterfly valve 19 is connected to the pipeline close to the hot water output port side of the waste heat production part 4; the fourth electric regulating valve 15 is connected to the pipeline close to the hot water input port side of the plate heat exchanger 2.

[0042] In summer, the waste heat generated by the waste heat output part 4 passes through the seventh butterfly valve 19 and the fourth electric regulating valve 15 to reach the plate heat exchanger 2 for heat exchange, and the cold water after heat exchange returns to the waste heat output part 4 through the second pipeline for circulated heat exchange; the hot water exchanged by the plate heat exchanger 2 enters the heat storage area in the soil energy storage mechanism to make sufficient heat reserve for winter heating.

[0043] Embodiment 4:

[0044] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from the first embodiment in that: the second pipeline includes a pipeline, a fourth water pump 8, an eighth butterfly valve 20 and a fourth butterfly valve 16; the pipeline is connected between the cold water inlet of the waste heat production part 4 and the cold water outlet of the plate heat exchanger 2; the fourth water pump 8 and the eighth butterfly valve 20 are connected to the cold water inlet side close to the waste heat production part 4; the fourth butterfly valve 16 is connected to the cold water outlet side close to the plate heat exchanger 2.

[0045] In summer, the waste heat generated by the waste heat generating unit 4 is converted into cold water after heat exchange in the plate heat exchanger 2, and then returns to the waste heat generating unit 4 for heat exchange through the fourth butterfly valve 16, the eighth butterfly valve 20, and the fourth water pump 8 in sequence, thereby fully utilizing water resources.

[0046] Embodiment five:

[0047] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from that of Example 1 in that: the third pipeline includes a pipeline, a third water pump 7, a third butterfly valve 13 and a fifth butterfly valve 17; the pipeline is connected between the hot water inlet of the heat user 3 and the hot water outlet of the heat pump unit 1; the third water pump 7 and the fifth butterfly valve 17 are connected to the hot water inlet side close to the heat user 3, and the third butterfly valve 13 is connected to the hot water outlet side close to the heat pump unit 1.

[0048] In winter, the hot water whose temperature is further increased by the heat pump unit 1 passes through the third butterfly valve 13, the fifth butterfly valve 17, and the third water pump 7 to provide heat to the heat user 3. The return water of the heat user 3 returns to the heat pump unit 1 for circulation and heat exchange, ensuring a stable and continuous heating state for the heat user 3.

[0049] Embodiment six:

[0050] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from that of Example 1 in that: the fourth pipeline includes a pipeline, a sixth butterfly valve 18 and a third electric regulating valve 14; the pipeline is connected between the return water port of the heat user 3 and the cold water inlet of the heat pump unit 1; the sixth butterfly valve 18 is connected to the return water port side close to the heat user 3; the third electric regulating valve 14 is connected to the cold water inlet side close to the heat pump unit 1.

[0051] In winter, the hot water whose temperature is further increased by the heat pump unit 1 is used to heat the heat user 3 through the third pipeline. The return water from the heat user 3 is returned to the heat pump unit 1 through the sixth butterfly valve 18 and the third electric regulating valve 14 for circulation heat exchange, thereby ensuring a stable and continuous heating state for the heat user 3.

[0052] Embodiment seven:

[0053] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from that of Example 1 in that: the fifth pipeline includes a pipeline and a second butterfly valve 11; the pipeline is connected between the hot water outlet of the plate heat exchanger 2 and the heat inlet and outlet of the soil energy storage mechanism; the second butterfly valve 11 is connected to the hot water outlet of the plate heat exchanger 2.

[0054] In summer, the waste heat generated by the waste heat production unit 4 is converted into hot water after heat exchange in the plate heat exchanger 2, and enters the soil energy storage mechanism through the second butterfly valve 11 and the tenth butterfly valve 22 for heat storage, providing heat for the heat user 3 in winter.

[0055] Embodiment eight:

[0056] according to Figure 1The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from the first embodiment in that: the sixth pipeline includes a pipeline, a second water pump 6 and a second electric regulating valve 12; the pipeline is connected between the cold water inlet of the plate heat exchanger 2 and the cold inlet and outlet of the soil energy storage mechanism; the second water pump 6 and the second electric regulating valve 12 are connected to the cold water inlet of the plate heat exchanger 2.

[0057] In summer, when the temperature of hot water stored in the heat storage area of ​​the soil energy storage mechanism drops, it flows through the second stop valve 24 in the cold storage area, and after further cooling in the cold storage area, it passes through the ninth butterfly valve 21, the second water pump 6, and the second electric regulating valve 12 in sequence and returns to the plate heat exchanger 2 for circulation heat exchange.

[0058] Embodiment nine:

[0059] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from the first embodiment in that: the seventh pipeline includes a pipeline, a first water pump 5 and a first electric regulating valve 9; the pipeline is connected between the hot water inlet of the heat pump unit 1 and the heat inlet and outlet of the soil energy storage mechanism; the first water pump 5 and the first electric regulating valve 9 are connected to the hot water inlet of the heat pump unit 1.

[0060] In winter, the hot water after heat exchange and temperature increase in the heat storage area enters the heat pump unit 1 through the tenth butterfly valve 22, the first electric regulating valve 9, and the first water pump 5 to further increase the temperature; the hot water after being increased by the heat pump unit 1 provides heat to the heat user 3, and the return water from the heat user 3 returns to the heat pump unit 1 for circulated heat exchange, thereby achieving the purpose of continuously providing heat to the heat user 3.

[0061] Embodiment ten:

[0062] according to Figure 1 The buried pipe ground source heat pump inter-seasonal heat storage and heating system based on soil thermal balance shown in the figure is different from that of Example 1 in that: the eighth pipeline includes a pipeline and a first butterfly valve 10; the pipeline is connected between the cold water inlet of the heat pump unit 1 and the cold water inlet and outlet of the soil energy storage mechanism; the first butterfly valve 10 is connected to the cold water inlet of the heat pump unit 1.

[0063] In winter, the return water of the heat pump unit 1 flows through the first butterfly valve 10 and the ninth butterfly valve 21 through the second stop valve 24 in the cold storage area, and stores the cold energy in the soil. After that, it is heated in the hot storage area and circulated to the heat pump unit 1, forming a closed loop for supplying heat to the heat user 3. In this working condition, the other pipelines are closed.

[0064] Embodiment eleven:

[0065] according to Figure 1The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil thermal balance shown in the figure is different from that of Example 1 in that: the soil energy storage mechanism includes a hot storage area and a cold storage area; the hot storage area and the cold storage area are respectively provided with buried pipe heat exchangers; the buried pipe heat exchanger in the hot storage area is provided with a hot inlet and outlet, and the buried pipe heat exchanger in the cold storage area is provided with a cold inlet and outlet; the buried pipe heat exchanger in the hot storage area is connected to the hot water input port of the heat pump unit 1 and the hot water output port of the plate heat exchanger 2 through the tenth butterfly valve 22 on the hot inlet and outlet; the buried pipe heat exchanger in the cold storage area is connected to the cold water output port of the heat pump unit 1 and the cold water input port of the plate heat exchanger 2 through the ninth butterfly valve 21 on the cold inlet and outlet; the buried pipe heat exchanger in the hot storage area is connected to the buried pipe heat exchanger in the cold storage area. The devices are connected by a pipeline, and a first stop valve 23 is connected to the pipeline; a second stop valve 24 is connected to the pipeline connecting the buried pipe heat exchanger in the cold storage area and the ninth butterfly valve 21; the first pipeline includes a pipeline, a seventh butterfly valve 19 and a fourth electric regulating valve 15; the pipeline is connected between the hot water output port of the waste heat production part 4 and the hot water input port of the plate heat exchanger 2; the seventh butterfly valve 19 is connected to the pipeline near the hot water output port side of the waste heat production part 4; the fourth electric regulating valve 15 is connected to the pipeline near the hot water input port side of the plate heat exchanger 2; the second pipeline includes a pipeline, a fourth water pump 8, an eighth butterfly valve 20 and a fourth butterfly valve 16; the pipeline is connected between the cold water input port of the waste heat production part 4 and the cold water input port of the plate heat exchanger 2 water output port; the fourth water pump 8 and the eighth butterfly valve 20 are connected to the cold water input port side near the waste heat output part 4; the fourth butterfly valve 16 is connected to the cold water output port side near the plate heat exchanger 2; the third pipeline includes a pipeline, a third water pump 7, a third butterfly valve 13 and a fifth butterfly valve 17; the pipeline is connected between the hot water input port of the heat user 3 and the hot water output port of the heat pump unit 1; the third water pump 7 and the fifth butterfly valve 17 are connected to the hot water input port side near the heat user 3, and the third butterfly valve 13 is connected to the hot water output port side near the heat pump unit 1; the fourth pipeline includes a pipeline, a sixth butterfly valve 18 and a third electric regulating valve 14; the pipeline is connected between the return water port of the heat user 3 and the cold water input port of the heat pump unit 1; the The sixth butterfly valve 18 is connected to the return water side close to the heat user 3; the third electric regulating valve 14 is connected to the cold water input side close to the heat pump unit 1; the fifth pipeline includes a pipeline and a second butterfly valve 11; the pipeline is connected between the hot water output port of the plate heat exchanger 2 and the hot inlet and outlet of the soil energy storage mechanism; the second butterfly valve 11 is connected to the hot water output port of the plate heat exchanger 2; the sixth pipeline includes a pipeline, a second water pump 6 and a second electric regulating valve 12; the pipeline is connected between the cold water input port of the plate heat exchanger 2 and the cold inlet and outlet of the soil energy storage mechanism; the second water pump 6 and the second electric regulating valve 12 are connected to the cold water input port of the plate heat exchanger 2; the seventh pipeline includes a pipeline, a first water pump 5 and a first electric regulating valve 9;The pipeline is connected between the hot water input port of the heat pump unit 1 and the hot water inlet and outlet of the soil energy storage mechanism; the first water pump 5 and the first electric regulating valve 9 are connected to the hot water input port of the heat pump unit 1; the eighth pipeline includes a pipeline and a first butterfly valve 10; the pipeline is connected between the cold water input port of the heat pump unit 1 and the cold water inlet and outlet of the soil energy storage mechanism; the first butterfly valve 10 is connected to the cold water input port of the heat pump unit 1. ;

[0066] In actual use, the following process is included:

[0067] (1) Summer heat storage

[0068] In summer, the waste heat generated by the waste heat output unit 4 passes through the seventh butterfly valve 19 and the fourth electric regulating valve 15 to reach the plate heat exchanger 2 for heat exchange, and then passes through the fourth butterfly valve 16, the eighth butterfly valve 20, and the fourth water pump 8 to return to the waste heat output unit 4 for circulated heat exchange; the hot water exchanged by the plate heat exchanger 2 passes through the second butterfly valve 11, the tenth butterfly valve 22, and the first stop valve 23 to store the heat in the heat storage area of ​​the soil; after the water temperature in the heat storage area is reduced, it flows through the cold storage area and is further cooled by the second stop valve 24, and then passes through the ninth butterfly valve 21, the second water pump 6, and the second electric regulating valve 12 to return to the plate heat exchanger 2 for circulated heat exchange. This process realizes the effect of storing waste heat in the heat storage area in the soil and reducing waste heat. Under this working condition, the corresponding second water pump 6 and the fourth water pump 8 are turned on, the second butterfly valve 11, the second electric regulating valve 12, the fourth electric regulating valve 15, the fourth butterfly valve 16, the seventh butterfly valve 19, the eighth butterfly valve 20, the ninth butterfly valve 21, the tenth butterfly valve 22, the first stop valve 23, and the second stop valve 24 are turned on, and the rest are closed.

[0069] (2) Winter heating

[0070] In winter, the return water of the heat pump unit 1 flows through the first butterfly valve 10 and the ninth butterfly valve 21 through the second stop valve 24 in the cold storage area, stores the cold in the soil, and exchanges heat after passing through the first stop valve 23; after the temperature is increased, it passes through the tenth butterfly valve 22, the first electric regulating valve 9, and the first water pump 5 to enter the heat pump unit 1 to further increase the temperature; the hot water after being increased by the heat pump unit 1 passes through the third butterfly valve 13, the fifth butterfly valve 17, and the third water pump 7 to provide heat for the heat user 3, and the return water from the heat user 3 passes through the sixth butterfly valve 18 and the third electric regulating valve 14 to enter the heat pump unit 1 for circulation and heat exchange. Under this working condition, the corresponding first water pump 5 and the third water pump 7 are turned on, the first electric regulating valve 9, the first butterfly valve 10, the third butterfly valve 13, the third electric regulating valve 14, the fifth butterfly valve 17, the sixth butterfly valve 18, the ninth butterfly valve 21, the tenth butterfly valve 22, the first stop valve 23, and the second stop valve 24 are turned on, and the rest are closed.

[0071] The utility model stores the waste heat generated by cogeneration or waste incineration plants in summer in the soil through a buried pipe heat exchanger, extracts the heat stored in the soil through the buried pipe heat exchanger in winter, and supplies heat after being lifted by a heat pump, thereby achieving a cross-seasonal balance of soil heat storage and extraction. The utility model effectively reduces the waste of waste heat in summer and reduces carbon emissions. The utility model simply organically combines the soil energy storage mechanism, heat pump unit, plate heat exchanger, heat user and waste heat output unit through pipelines and valves, thereby achieving cross-seasonal utilization of waste heat.

[0072] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0073] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0074] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0075] The above is only a preferred embodiment of the utility model. The utility model will not be limited to these embodiments shown in this article, but should conform to the widest range consistent with the principles and novel features disclosed in this article. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model still fall within the scope of the technical solution of the utility model.

Claims

1. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance is characterized by: The invention comprises a soil energy storage mechanism, a heat pump unit (1), a plate heat exchanger (2), a heat user (3) and a waste heat output unit (4); the heat pump unit (1) is provided with a hot water input port, a hot water output port, a cold water input port and a cold water output port; the plate heat exchanger (2) is provided with a hot water input port, a hot water output port, a cold water input port and a cold water output port; the heat user (3) is provided with a hot water input port and a return water port; the waste heat output unit (4) is provided with a hot water output port and a cold water input port; the soil energy storage mechanism is provided with a hot inlet and a cold inlet and a cold inlet and a hot inlet and a cold inlet, a tenth butterfly valve (22) is provided on the hot inlet and a ninth butterfly valve (21) is provided on the cold inlet and a hot water output port of the waste heat output unit (4) is connected to the hot water input port of the plate heat exchanger (2) via a first pipeline, The cold water input port of the waste heat output unit (4) is connected to the cold water output port of the plate heat exchanger (2) via a second pipeline; the hot water input port of the heat user (3) is connected to the hot water output port of the heat pump unit (1) via a third pipeline, and the return water port of the heat user (3) is connected to the cold water input port of the heat pump unit (1) via a fourth pipeline; the hot water output port of the plate heat exchanger (2) is connected to the hot inlet and outlet of the soil energy storage mechanism via a fifth pipeline, and the cold water input port of the plate heat exchanger (2) is connected to the cold inlet and outlet of the soil energy storage mechanism via a sixth pipeline; the hot water input port of the heat pump unit (1) is connected to the hot inlet and outlet of the soil energy storage mechanism via a seventh pipeline, and the cold water input port of the heat pump unit (1) is connected to the cold water inlet and outlet of the soil energy storage mechanism via an eighth pipeline.

2. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized by: The soil energy storage mechanism comprises a heat storage area and a cold storage area; the heat storage area and the cold storage area are respectively provided with ground pipe heat exchangers; the ground pipe heat exchanger in the heat storage area is provided with a hot inlet and outlet, and the ground pipe heat exchanger in the cold storage area is provided with a cold inlet and outlet; the ground pipe heat exchanger in the heat storage area is connected to the hot water input port of the heat pump unit (1) and the hot water output port of the plate heat exchanger (2) through a tenth butterfly valve (22) on the hot inlet and outlet; the ground pipe heat exchanger in the cold storage area is connected to the cold water output port of the heat pump unit (1) and the cold water input port of the plate heat exchanger (2) through a ninth butterfly valve (21) on the cold inlet and outlet; the ground pipe heat exchanger in the heat storage area is connected to the ground pipe heat exchanger in the cold storage area through a pipeline, and a first stop valve (23) is connected to the pipeline; and a second stop valve (24) is connected to the pipeline connecting the ground pipe heat exchanger in the cold storage area and the ninth butterfly valve (21).

3. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized by: The first pipeline comprises a pipeline, a seventh butterfly valve (19) and a fourth electric regulating valve (15); the pipeline is connected between the hot water output port of the waste heat production part (4) and the hot water input port of the plate heat exchanger (2); the seventh butterfly valve (19) is connected to the pipeline close to the hot water output port of the waste heat production part (4); and the fourth electric regulating valve (15) is connected to the pipeline close to the hot water input port of the plate heat exchanger (2).

4. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized in that: The second pipeline comprises a pipeline, a fourth water pump (8), an eighth butterfly valve (20) and a fourth butterfly valve (16); the pipeline is connected between the cold water inlet of the waste heat production part (4) and the cold water outlet of the plate heat exchanger (2); the fourth water pump (8) and the eighth butterfly valve (20) are connected on the side close to the cold water inlet of the waste heat production part (4); and the fourth butterfly valve (16) is connected on the side close to the cold water outlet of the plate heat exchanger (2).

5. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized by: The third pipeline comprises a pipeline, a third water pump (7), a third butterfly valve (13) and a fifth butterfly valve (17); the pipeline is connected between the hot water input port of the heat user (3) and the hot water output port of the heat pump unit (1); the third water pump (7) and the fifth butterfly valve (17) are connected on the side close to the hot water input port of the heat user (3), and the third butterfly valve (13) is connected on the side close to the hot water output port of the heat pump unit (1).

6. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized by: The fourth pipeline comprises a pipeline, a sixth butterfly valve (18) and a third electric regulating valve (14); the pipeline is connected between the return water port of the heat user (3) and the cold water input port of the heat pump unit (1); the sixth butterfly valve (18) is connected to the return water port side close to the heat user (3); and the third electric regulating valve (14) is connected to the cold water input port side close to the heat pump unit (1).

7. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized by: The fifth pipeline comprises a pipeline and a second butterfly valve (11); the pipeline is connected between the hot water outlet of the plate heat exchanger (2) and the heat inlet and outlet of the soil energy storage mechanism; the second butterfly valve (11) is connected to the hot water outlet of the plate heat exchanger (2).

8. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1 is characterized by: The sixth pipeline comprises a pipeline, a second water pump (6) and a second electric regulating valve (12); the pipeline is connected between the cold water input port of the plate heat exchanger (2) and the cold inlet and outlet of the soil energy storage mechanism; the second water pump (6) and the second electric regulating valve (12) are connected to the cold water input port of the plate heat exchanger (2).

9. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1, characterized in that: The seventh pipeline comprises a pipeline, a first water pump (5) and a first electric regulating valve (9); the pipeline is connected between the hot water input port of the heat pump unit (1) and the heat inlet and outlet of the soil energy storage mechanism; the first water pump (5) and the first electric regulating valve (9) are connected to the hot water input port of the heat pump unit (1).

10. The inter-seasonal heat storage and heating system of the buried pipe ground source heat pump based on soil heat balance according to claim 1, characterized in that: The eighth pipeline comprises a pipeline and a first butterfly valve (10); the pipeline is connected between the cold water input port of the heat pump unit (1) and the cold water inlet and outlet of the soil energy storage mechanism; the first butterfly valve (10) is connected to the cold water input port of the heat pump unit (1).

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