Large-scale cross-seasonal heat storage water tank and system

Abstract

The utility model provides a large-scale cross-seasonal heat storage water tank and system, the large-scale cross-seasonal heat storage water tank is provided with a plurality of grids, one of the grids is an air grid for circulating water, and only cold water or hot water is stored in each of the rest grids. By means of the large-scale cross-seasonal heat storage system and the scheduling method, common storage of cold water and hot water in the same water pool is achieved, mixing of the cold water and the hot water is avoided, and a hot water area and a cold water area are separated through an air separation grid.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat storage, and particularly relates to a large-scale seasonal heat storage hot water tank and system. Background Art

[0002] The seasonal heat storage technology stores the heat energy collected in the non-heating season in a large-capacity heat storage body, and extracts it in the heating season and inputs it into the heating network for heating. It can solve the problem of the mismatch between the heat source and the heat demand in seasons, and provide a new technical route for replacing coal with clean energy and regional energy supply. The larger the volume of the seasonal heat storage body, the lower the heat storage cost per unit volume, which can effectively reduce the construction cost of the heat storage body, promote the reduction of the heating cost, and is conducive to the reduction of the final heating price. However, at present, the heat storage volumes at home and abroad are generally not large, it is difficult to form a scale effect, and the construction cost of the heat storage body cannot be effectively reduced. If large-scale seasonal heat storage is carried out, the investment and construction cost of seasonal heat storage will be significantly reduced, and a truly commercial low-carbon heating mode can be realized.

[0003] At present, the hot water heat storage technology widely used in engineering is the thermocline heat storage technology, which uses the same heat storage body to store two media with high and low temperatures at the same time, and is widely used in the heat storage scenarios with a daily cycle. However, the large-scale seasonal heat storage body has a large volume, which can reach hundreds of thousands or even millions of cubic meters. Limited by the requirements of the structural design, its "height-diameter ratio" is small, the plane size is large, it is difficult for the water distributor to achieve uniform water distribution, and significant turbulence will occur between the cold and hot water in the thermocline, resulting in poor temperature stratification effect and a thicker thermocline, which will reduce the effective volume of the cold and hot media. This adverse effect will be more prominent in the application of large-scale seasonal heat storage hot water bodies with a small "height-diameter ratio".

[0004] If a cold water tank and a hot water tank are used to store cold water and hot water respectively, the volume of the storage tank is more than twice the volume of the hot water storage, and the utilization rate of the heat storage body is low, resulting in an increase in the initial investment. For large-scale seasonal heat storage, the investment proportion of the heat storage body is very large, and the increase in the initial investment caused by using the "double-tank" heat storage form will have a subversive impact on the project decision-making. Content of the Utility Model

[0005] The utility model aims to solve the defects and deficiencies of the prior art, and provides a large-scale seasonal heat storage hot water tank and system, which can not only avoid the mixing of cold and hot water, but also achieve a high utilization rate of the heat storage body, improve the heat storage efficiency of the system, and save the initial investment.

[0006] To achieve the above utility model purpose, the utility model provides a large-scale seasonal heat storage hot water tank, which includes a pool wall and a partition wall. The partition wall divides the inner part of the pool into several compartments. The several compartments are arranged adjacent to each other in the horizontal direction, parallel to each other, and each of the several compartments is provided with an inlet and an outlet.

[0007] Furthermore, the outer wall is wrapped with a heat-insulating layer.

[0008] Furthermore, one of the compartments is an empty compartment for water turnover, and the rest of the compartments are filled with water.

[0009] The present utility model also provides a large-scale seasonal heat storage system using the above-mentioned large-scale seasonal hot water storage tank. The system includes: an inlet pipe and an outlet pipe communicating with each compartment of the tank, an inlet main pipe, an outlet main pipe, a circulation pump, a heat source side heat exchanger, and a user side heat exchanger; the other end of the inlet pipe communicating with each compartment of the tank is connected to the inlet main pipe; the other end of the outlet pipe communicating with each compartment of the tank is connected to the outlet main pipe; both ends of the heat source side heat exchanger are a heat source side heat exchanger inlet pipe and a heat source side heat exchanger outlet pipe, the heat source side heat exchanger inlet pipe is connected to the outlet main pipe, and the heat source side heat exchanger outlet pipe is connected to the inlet main pipe; both ends of the user side heat exchanger are a user side heat exchanger inlet pipe and a user side heat exchanger outlet pipe, the user side heat exchanger inlet pipe is connected to the outlet main pipe, and the user side heat exchanger outlet pipe is connected to the inlet main pipe; the circulation pump is arranged on the outlet main pipe and is located between the heat exchanger interface and the tank outlet pipe interface.

[0010] Furthermore, an inlet pipe control valve is arranged on the inlet pipe of each compartment of the tank; an outlet pipe control valve is arranged on the outlet pipe of each compartment of the tank; a heat source side heat exchanger inlet pipe control valve is arranged on the heat source side heat exchanger inlet pipe; a heat source side heat exchanger outlet pipe control valve is arranged on the heat source side heat exchanger outlet pipe; a user side heat exchanger inlet pipe control valve is arranged on the user side heat exchanger inlet pipe; a user side heat exchanger outlet pipe control valve is arranged on the user side heat exchanger outlet pipe; during the working process, the inlet pipe control valve of the empty compartment and the outlet pipe control valve of one of the compartments filled with water in the tank are opened, and the water enters the empty compartment after heat exchange through the heat exchanger.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] The utility model provides a large-scale cross-season hot water storage tank and system. The large-scale cross-season hot water storage tank is provided with a plurality of compartments, one of which is an empty compartment for circulating water, and each of the remaining compartments stores only cold water or hot water. Through a large-scale cross-season heat storage system and scheduling method, the co-storage of cold and hot water in the same tank is realized, and the mixing of cold and hot water is avoided, so that the hot water area and the cold water area are separated by the empty compartment. Compared with the traditional thermocline heat storage technology, through corresponding settings, the utility model realizes temperature stratification in the horizontal direction, and there is an air insulation compartment between the cold and hot water, effectively reducing the mixing heat exchange phenomenon between the cold and hot water, and improving the heat storage efficiency and effective volume. Compared with the "double-tank" heat storage technology in which the cold and hot water are respectively provided with tanks, the utility model realizes the co-storage of cold and hot water in the same tank by adding an empty compartment for circulating water on the basis of a single tank, greatly improving the utilization rate of the heat storage body and reducing the scale and initial investment of the heat storage body. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a large-scale cross-season hot water storage tank;

[0014] Figure 2 It is a schematic overall structural diagram of a large-scale cross-season heat storage system;

[0015] Wherein: 1 - the first compartment; 2 - the second compartment; 3 - the third compartment; 4 - the (n - 2)th compartment; 5 - the (n - 1)th compartment; 6 - the nth compartment; 7 - the inlet pipeline of the first compartment; 8 - the inlet pipeline of the second compartment; 9 - the inlet pipeline of the third compartment; 10 - the inlet pipeline of the (n - 2)th compartment; 11 - the inlet pipeline of the (n - 1)th compartment; 12 - the inlet pipeline of the nth compartment; 13 - the main inlet pipe; 14 - the outlet pipeline of the first compartment; 15 - the outlet pipeline of the second compartment; 16 - the outlet pipeline of the third compartment; 17 - the outlet pipeline of the (n - 2)th compartment; 18 - the outlet pipeline of the (n - 1)th compartment; 19 - the outlet pipeline of the nth compartment; 20 - the main outlet pipe; 21 - the outlet pipeline of the heat source side heat exchanger; 22 - the outlet pipeline of the user side heat exchanger; 23 - the inlet pipeline of the user side heat exchanger; 24 - the inlet pipeline of the heat source side heat exchanger; 25 - the heat source side heat exchanger; 26 - the user side heat exchanger; 27 - the control valve of the inlet pipeline of the heat source side heat exchanger; 28 - the circulation pump; 29 - the control valve of the inlet pipeline of the first compartment; 30 - the control valve of the inlet pipeline of the second compartment; 31 - the control valve of the inlet pipeline of the third compartment; 32 - the control valve of the inlet pipeline of the (n - 2)th compartment; 33 - the control valve of the inlet pipeline of the (n - 1)th compartment; 34 - the control valve of the inlet pipeline of the nth compartment; 35 - the control valve of the outlet pipeline of the first compartment; 36 - the control valve of the outlet pipeline of the second compartment; 37 - the control valve of the outlet pipeline of the third compartment; 38 - the control valve of the outlet pipeline of the (n - 2)th compartment; 39 - the control valve of the outlet pipeline of the (n - 1)th compartment; 40 - the control valve of the outlet pipeline of the nth compartment; 41 - the control valve of the outlet pipeline of the heat source side heat exchanger; 42 - the control valve of the outlet pipeline of the user side heat exchanger; 43 - the control valve of the inlet pipeline of the user side heat exchanger.

[0016] 101 - the pool wall; 102 - the partition wall. Detailed implementation manner

[0017] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a large-scale cross-season hot water storage pool and system of the present utility model with reference to the accompanying drawings.

[0018] It should be noted that all the components and equipment used in the present utility model, without special instructions, are all components and equipment known in the art. For example: the heat source side heat exchanger 25 and the user side heat exchanger 26 both adopt conventional plate heat exchangers or heat pump units known in the prior art. The circulation pump 28 adopts a conventional variable frequency circulation pump known in the prior art.

[0019] Complying with the above technical solutions, the following gives specific embodiments of the present utility model. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present utility model.

[0020] Embodiment 1:

[0021] This embodiment provides a large-scale cross-seasonal hot water storage pool, such as Figure 1 As shown, a large-scale cross-seasonal hot water storage pool, characterized in that: it includes a pool wall 101 and a partition wall 102. The partition wall 102 divides the inner part of the pool into several compartments. The several compartments are arranged adjacent to each other in the horizontal direction, parallel to each other, and each of the several compartments is provided with an inlet and an outlet.

[0022] As a specific solution of this embodiment, the outer wall of the pool is wrapped with a heat insulation layer.

[0023] As a specific solution of this embodiment, one of the compartments is an empty compartment for turnover water, and the rest of the compartments are filled with water.

[0024] Embodiment 2:

[0025] This embodiment provides a large-scale cross-seasonal heat storage system, such as Figure 2 As shown, the system includes: the large-scale cross-seasonal hot water storage pool of Embodiment 1, the first compartment inlet pipe 7 and the first compartment outlet pipe 14 connected to the first compartment, the second compartment inlet pipe 8 and the second compartment outlet pipe 15 connected to the second compartment, the third compartment inlet pipe 9 and the third compartment outlet pipe 16 connected to the third compartment, the (n - 2)th compartment inlet pipe 10 and the (n - 2)th compartment outlet pipe 17 connected to the (n - 2)th compartment, the (n - 1)th compartment inlet pipe 11 and the (n - 1)th compartment outlet pipe 18 connected to the (n - 1)th compartment, the nth compartment inlet pipe 12 and the nth compartment outlet pipe 19 connected to the nth compartment, the inlet main pipe 13, the outlet main pipe 20, the circulation pump 28, the heat source side heat exchanger 25, and the user side heat exchanger 26.

[0026] One end of the large-scale cross-seasonal hot water storage pool inlet pipe 7 is connected to the first compartment 1 of the large-scale cross-seasonal hot water storage pool of Embodiment 1, and the other end is connected to the inlet main pipe 13; both ends of the heat source side heat exchanger 25 are the heat source side heat exchanger inlet pipe 24 and the heat source side heat exchanger outlet pipe 21. The heat source side heat exchanger inlet pipe 24 is connected to the outlet main pipe 20, and the heat source side heat exchanger outlet pipe 21 is connected to the inlet main pipe 13; both ends of the user side heat exchanger 26 are the user side heat exchanger inlet pipe 23 and the user side heat exchanger outlet pipe 22. The user side heat exchanger inlet pipe 23 is connected to the outlet main pipe 20, and the user side heat exchanger outlet pipe 22 is connected to the inlet main pipe 13; the circulation pump 28 is arranged on the outlet main pipe 20, between the heat exchanger interface and the outlet pipe interface of the large-scale cross-seasonal hot water storage pool of Embodiment 1.

[0027] On the inlet pipeline 7 of the first compartment of the large-scale cross-seasonal hot water storage tank, there is an inlet pipeline control valve 29; on the outlet pipeline 14 of the first compartment, there is an outlet pipeline control valve 35; on the inlet pipeline 8 of the second compartment, there is an inlet pipeline control valve 30; on the outlet pipeline 15 of the second compartment, there is an outlet pipeline control valve 36; on the inlet pipeline 9 of the third compartment, there is an inlet pipeline control valve 31; on the outlet pipeline 16 of the third compartment, there is an outlet pipeline control valve 37; on the inlet pipeline 10 of the (n - 2)th compartment, there is an inlet pipeline control valve 32; on the outlet pipeline 17 of the (n - 2)th compartment, there is an outlet pipeline control valve 38; on the inlet pipeline 11 of the (n - 1)th compartment, there is an inlet pipeline control valve 33; on the outlet pipeline 18 of the (n - 1)th compartment, there is an outlet pipeline control valve 39; on the inlet pipeline 12 of the nth compartment, there is an inlet pipeline control valve 34; on the outlet pipeline 19 of the nth compartment, there is an outlet pipeline control valve 40; on the heat source side heat exchanger inlet pipeline 24, there is a heat source side heat exchanger inlet pipeline control valve 27; on the heat source side heat exchanger outlet pipeline 21, there is a heat source side heat exchanger outlet pipeline control valve 41; on the user side heat exchanger inlet pipeline 23, there is a user side heat exchanger inlet pipeline control valve 43; on the user side heat exchanger outlet pipeline 22, there is a user side heat exchanger outlet pipeline control valve 42.

[0028] Embodiment 3:

[0029] This embodiment provides a scheduling method for the large-scale cross-seasonal heat storage system using the one in Embodiment 2. This method includes a heat storage mode and a heat supply mode.

[0030] In the heat storage mode, in the initial state, the first compartment 1 is an empty compartment, and the rest of the compartments are filled with cold water. Open the heat source side heat exchanger inlet pipeline control valve 27, the heat source side heat exchanger outlet pipeline control valve 41, the inlet pipeline control valve 29 of the first compartment, the outlet pipeline control valve 36 of the second compartment, and the circulation pump 28, and close the other control valves; then the circulation pump 28 pumps the cold water in the second compartment 2 of the large-scale cross-seasonal hot water storage tank, transports it to the heat source side heat exchanger 25 for heat exchange, and transports the heated hot water to the first compartment 1 until the first compartment 1 is filled with hot water and the water in the second compartment 2 is emptied. Then close the inlet pipeline control valve 29 of the first compartment and the outlet pipeline control valve 36 of the second compartment, open the inlet pipeline control valve 30 of the second compartment and the outlet pipeline control valve 37 of the third compartment, and the circulation pump 28 pumps the cold water in the third compartment 3 of the large-scale cross-seasonal hot water storage tank, transports it to the heat source side heat exchanger 25 for heat exchange, and transports the heated hot water to the second compartment 2 until the second compartment 2 is filled with hot water and the water in the third compartment 3 is emptied. In this way, sequentially pump the cold water in the 4th, 5th... nth compartments for heating. Finally, the (n - 1)th compartment 5 is filled with hot water and the water in the nth compartment 6 is emptied.

[0031] In the heating mode, in the initial state, the nth compartment 6 is an empty compartment, and the remaining compartments are filled with hot water. Open the control valve 43 of the inlet pipeline of the user-side heat exchanger, the control valve 42 of the outlet pipeline of the user-side heat exchanger, the control valve 34 of the inlet pipeline of the nth compartment, the control valve 39 of the outlet pipeline of the (n - 1)th compartment, and the circulation pump 28, and close the remaining control valves; then the circulation pump 28 extracts the hot water in the (n - 1)th compartment 5 of the large-scale seasonal heat storage water tank and transports it to the user-side heat exchanger 26 for heat exchange, and transports the cooled water after heat exchange to the nth compartment 6 until the nth compartment 6 is filled with cold water and the water in the (n - 1)th compartment 5 is emptied. Then close the control valve 34 of the inlet pipeline of the nth compartment and the control valve 39 of the outlet pipeline of the (n - 1)th compartment, open the control valve 33 of the inlet pipeline of the (n - 1)th compartment and the control valve 38 of the outlet pipeline of the (n - 2)th compartment, and the circulation pump 28 extracts the cold water in the (n - 2)th compartment 4 of the large-scale seasonal heat storage water tank and transports it to the user-side heat exchanger 26 for heat exchange, and transports the cooled water after heat exchange to the (n - 1)th compartment 5 until the (n - 1)th compartment 5 is filled with cold water and the water in the (n - 2)th compartment 4 is emptied. Extract the hot water in the (n - 3), (n - 4),..., 1st compartments for heat release in this way. Finally, the 2nd compartment 2 is filled with cold water and the water in the 1st compartment 1 is emptied.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A large-scale cross-seasonal hot water storage pool, comprising a pool wall (101) and a partition wall (102), wherein the partition wall (102) divides the interior of the pool into a plurality of compartments, wherein the plurality of compartments are arranged adjacent to each other in a horizontal direction and are parallel to each other, and each of the plurality of compartments is provided with a water inlet and a water outlet.

2. The large-scale cross-seasonal hot water storage pool according to claim 1, characterized in that The outer wall is wrapped with an insulation layer.

3. The large-scale cross-seasonal hot water storage pool according to claim 1, characterized in that One of the compartments is an empty compartment for circulating water, and the other compartments are filled with water.

4. A large-scale inter-seasonal heat storage system using the large-scale inter-seasonal heat storage tank according to claim 3, the system comprising: A water inlet pipe and a water outlet pipe connected to each compartment of the water pool, a water inlet main pipe (13), a water outlet main pipe (20), a circulating pump (28), a heat source side heat exchanger (25), and a user side heat exchanger (26); the other end of the water inlet pipe connected to each compartment of the water pool is connected to the water inlet main pipe (13); the other end of the water outlet pipe connected to each compartment of the water pool is connected to the water outlet main pipe (20); the two ends of the heat source side heat exchanger (25) are a heat source side heat exchanger water inlet pipe (24) and a heat source side heat exchanger water outlet pipe (21); the heat source side heat exchanger water inlet pipe (24) is connected to the user side heat exchanger water outlet pipe (21); ) is connected to the outlet mother pipe (20), and the outlet pipe (21) of the heat source side heat exchanger is connected to the inlet mother pipe (13); the two ends of the user side heat exchanger (26) are the user side heat exchanger inlet pipe (23) and the user side heat exchanger outlet pipe (22), the user side heat exchanger inlet pipe (23) is connected to the outlet mother pipe (20), and the user side heat exchanger outlet pipe (22) is connected to the inlet mother pipe (13); the circulating pump (28) is arranged on the outlet mother pipe (20), and is located between the heat exchanger interface and the pool outlet pipe interface.

5. The large-scale inter-seasonal heat storage system according to claim 4, characterized in that: A water inlet pipe control valve is provided on each compartment water inlet pipe of the water pool; a water outlet pipe control valve is provided on each compartment water outlet pipe of the water pool; a heat source side heat exchanger water inlet pipe control valve (27) is provided on the heat source side heat exchanger water inlet pipe (24); a heat source side heat exchanger water outlet pipe control valve (41) is provided on the heat source side heat exchanger water outlet pipe (21); a user side heat exchanger water inlet pipe control valve (43) is provided on the user side heat exchanger water inlet pipe (23); a user side heat exchanger water outlet pipe control valve (42) is provided on the user side heat exchanger water outlet pipe (22); during operation, the air compartment water inlet pipe control valve and the water outlet pipe control valve of one of the compartments filled with water in the water pool are opened, and water enters the air compartment after heat exchange through the heat exchanger.

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