Clean energy heat supply water and heat simultaneous storage system

Abstract

The invention discloses a clean energy heat supply water and heat simultaneous storage system, and relates to the technical field of clean energy heat supply, the clean energy heat supply water and heat simultaneous storage system comprises a heat storage system, a heat exchange station, a heat source station, a primary pipe network and a secondary pipe network, and the heat storage system is arranged on the primary pipe network outside or inside the heat source station. The primary pipe network comprises a primary pipe network water supply pipe, a primary pipe network water supply bypass pipe, a primary pipe network water return pipe, a primary pipe network water return first bypass pipe, a primary pipe network water return second bypass pipe and a primary pipe network water return third bypass pipe; the secondary pipe network comprises a secondary pipe network water supply pipe and a secondary pipe network water return pipe; the heat storage system is integrated at the joint of the primary pipe network water return pipe and the primary pipe network water supply pipe, so that the system can capture and utilize temperature difference resources between the primary pipe network water return pipe and the primary pipe network water supply pipe, namely the energy difference between low-temperature return water and high-temperature water supply, and the efficiency of the heat storage process and the energy utilization rate are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of clean energy heating, and in particular to a clean energy hot water and heat storage system. Background Art

[0002] The energy consumption of building heating accounts for a large proportion of the total energy consumption in my country. Clean energy heating has disadvantages such as low heat source quality, low energy density, and susceptibility to environmental conditions. In order to maintain the energy supply and demand balance between the heat source side and the user side, the existing technology is to add a heat storage system to the clean energy heating system to improve its heating stability. In addition, the main driving energy in the clean energy heating system is the electric energy consumed by the heat pump, which provides the possibility for the consumption of green electricity. At the same time, the "peak, valley and flat" electricity price policy has a huge impact on the operating economy of the system. The present invention adds a water storage tank heat storage system to the clean energy centralized heating system, stores heat during valley electricity prices and flat electricity prices, releases heat during peak electricity prices, and the stored hot water participates in a network water cycle, thereby realizing "water and heat storage" and "peak shaving and valley filling" of electricity consumption, thereby improving the stability of the clean energy centralized heating system and effectively reducing the operating cost.

[0003] The utility model patent with publication number "CN216924493U" and name "Heat Pump and Central Heating Pipeline Energy Storage Fusion System" uses ground source heat pump units on the user side to meet summer cooling needs by utilizing the characteristics of the central heating pipeline network, which has a wide distribution, a wide user service area, and a large water storage capacity. However, it does not provide a method or control plan for utilizing pipeline energy storage for winter heating.

[0004] The invention patent with the publication number "CN201711451153.8" and the name "Thermal power plant and peak-shaving method participating in power grid peak-shaving based on thermal power peak-shaving and heat storage in the heat network" proposes a thermal power plant participating in power grid peak-shaving based on thermal power peak-shaving and heat storage in the heat network. On the basis of meeting the thermal load, the thermal power plant utilizes the limited peak-shaving capacity of the machine and boiler to participate in power grid peak-shaving based on thermal power peak-shaving; with the help of the heat storage characteristics of the heat network, the thermal power coupling relationship is opened to implement further peak-shaving of the power grid.

[0005] Therefore, a clean energy hot water supply and heat storage system is proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the heating method used in the prior art cannot maintain high heating efficiency while maintaining low cost, and to propose a clean energy hot water and heat storage system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A clean energy hot water heat storage system comprises a heat storage system, a heat exchange station, a heat source station, a primary pipe network and a secondary pipe network. The heat storage system is arranged on the primary pipe network outside or inside the heat source station.

[0008] The primary pipe network includes a primary pipe network water supply pipe, a primary pipe network water supply bypass pipe, a primary pipe network return pipe, a primary pipe network return first bypass pipe, a primary pipe network return second bypass pipe and a primary pipe network return third bypass pipe, and the secondary pipe network includes a secondary pipe network water supply pipe and a secondary pipe network return pipe; Preferably, the heat exchange station includes a plate heat exchanger, a temperature sensor, an electric regulating valve, a secondary pipe network circulation pump and a secondary pipe network bypass pipe, wherein the heat exchange station includes: a plate heat exchanger, a temperature sensor, an electric regulating valve, a secondary pipe network circulation pump, a secondary pipe network bypass pipe, wherein: one end of the secondary pipe network return pipe is connected to the plate heat exchanger, and the other end is connected to the heat user; one end of the secondary pipe network water supply pipe is connected to the plate heat exchanger, and the other end is connected to the heat user; one end of the secondary pipe network bypass pipe is connected to the secondary pipe network water supply pipe, and the other end is connected to the secondary pipe network return pipe; the temperature sensor is arranged on the secondary pipe network water supply pipe; the electric regulating valve is arranged on the secondary pipe network bypass pipe; the secondary pipe network circulation pump is arranged on the secondary pipe network return pipe.

[0009] Preferably, the heat storage system comprises a stop valve group, a water storage tank and a water storage pump, the stop valve group comprises a first stop valve, a second stop valve and a third stop valve, and the heat storage system is arranged on a primary pipe network in the heat source station; The heat source station includes a primary pipe network circulation pump, a first heat pump unit and a second heat pump unit. The first heat pump unit and the second heat pump unit are arranged in parallel through a primary pipe network return pipe and a primary pipe network water supply pipe. One end of the primary pipe network return pipe is respectively connected to the first heat pump unit and the second heat pump unit, and the other end is connected to the plate heat exchanger; one end of the primary pipe network water supply pipe is respectively connected to the first heat pump unit and the second heat pump unit, and the other end is connected to the plate heat exchanger; one end of the primary pipe network water supply bypass pipe is connected to the primary pipe network water supply pipe, and the other end is connected to the heat inlet and outlet of the water storage tank. One end of the first bypass pipe of the network return water is connected to the primary network water supply bypass pipe, and the other end is connected to the primary network return water pipe. One end of the third bypass pipe of the primary network return water is connected to the water storage tank, and the other end is connected to the primary network return water pipe. One end of the second bypass pipe of the primary network return water is connected to the third bypass pipe of the primary network return water, and the other end is connected to the primary network return water pipe. The connection sequence on the primary network return water pipe is the first heat pump unit and the second heat pump unit, the first bypass pipe of the primary network return water, the second bypass pipe of the primary network return water, the third bypass pipe of the primary network return water, and the plate heat exchanger. The primary pipe network circulation pump is arranged on the primary pipe network return pipe and is located between the connection point of the primary pipe network return first bypass pipe and the primary pipe network return pipe and the connection point of the primary pipe network return second bypass pipe and the primary pipe network return pipe; The first stop valve is arranged on the primary pipe network water supply bypass pipe at the hot inlet and outlet of the water storage tank, and is located between the connection point of the first bypass pipe of the primary pipe network return water and the primary pipe network water supply bypass pipe and the connection point of the primary pipe network water supply pipe and the primary pipe network water supply bypass pipe; the second stop valve is arranged on the first bypass pipe of the primary pipe network return water; the third stop valve is arranged on the third bypass pipe of the primary pipe network return water, and is located between the connection point of the third bypass pipe of the primary pipe network return water and the second bypass pipe of the primary pipe network return water and the connection point of the third bypass pipe of the primary pipe network return water and the primary pipe network return water pipe.

[0010] Preferably, the water tank can be replaced by a water tank group, which is composed of a plurality of water tanks.

[0011] Preferably, the heat storage system comprises a stop valve group, a water storage tank and a water storage pump, the stop valve group comprises a first stop valve, a second stop valve and a third stop valve, and the heat storage system is arranged on a primary pipe network outside the heat source station; The heat source station includes a primary pipe network circulation pump, a first heat pump unit and a second heat pump unit. The first heat pump unit and the second heat pump unit are arranged in parallel through a primary pipe network return pipe and a primary pipe network water supply pipe. One end of the primary pipe network return pipe is respectively connected to the first heat pump unit and the second heat pump unit, and the other end is connected to the plate heat exchanger; one end of the primary pipe network water supply pipe is respectively connected to the first heat pump unit and the second heat pump unit, and the other end is connected to the plate heat exchanger; one end of the primary pipe network water supply bypass pipe is connected to the primary pipe network water supply pipe, and the other end is connected to the heat inlet and outlet of the water storage tank. One end of the first bypass pipe of the network return water is connected to the primary network water supply bypass pipe, and the other end is connected to the primary network return water pipe. One end of the third bypass pipe of the primary network return water is connected to the water storage tank, and the other end is connected to the primary network return water pipe. One end of the second bypass pipe of the primary network return water is connected to the third bypass pipe of the primary network return water, and the other end is connected to the primary network return water pipe. The connection sequence on the primary network return water pipe is the first heat pump unit and the second heat pump unit, the first bypass pipe of the primary network return water, the second bypass pipe of the primary network return water, the third bypass pipe of the primary network return water, and the plate heat exchanger. The primary pipe network circulation pump is arranged on the primary pipe network return pipe and is located between the connection point of the primary pipe network return first bypass pipe and the primary pipe network return pipe and the connection point of the primary pipe network return second bypass pipe and the primary pipe network return pipe; The first stop valve is arranged on the primary pipe network water supply bypass pipe at the hot inlet and outlet of the water storage tank, and is located between the connection point of the first bypass pipe of the primary pipe network return water and the primary pipe network water supply bypass pipe and the connection point of the primary pipe network water supply pipe and the primary pipe network water supply bypass pipe; the second stop valve is arranged on the first bypass pipe of the primary pipe network return water; the third stop valve is arranged on the third bypass pipe of the primary pipe network return water, and is located between the connection point of the third bypass pipe of the primary pipe network return water and the second bypass pipe of the primary pipe network return water and the connection point of the third bypass pipe of the primary pipe network return water and the primary pipe network return water pipe.

[0012] The beneficial effects of the present invention are: (1) The present invention integrates the heat storage system at the junction of the primary network return pipe and the primary network supply pipe, so that the system can capture and utilize the temperature difference resources between the two, that is, the energy difference between low-temperature return water and high-temperature supply water, thereby improving the efficiency and energy utilization of the heat storage process.

[0013] (2) In the present invention, whether it is a single water storage tank or a water storage tank group, high-efficiency water circulating in the primary pipe network is used as the heat storage medium, which not only realizes the efficient accumulation of heat, but also ensures that the stored hot water can be integrated into the circulation system of the primary pipe network, achieving "synchronous storage of water and heat", and effectively avoiding the problems of heat loss and decreased heat release potential caused by the heat exchange temperature difference in the traditional heat exchange process.

[0014] (3) The present invention can monitor the water temperature changes in the secondary pipe network water supply pipe in real time through the precisely configured temperature sensor, and based on this key data, it is convenient to adjust the opening of the electric control valve, and then adjust the hot water flow in the secondary pipe network, thereby realizing the efficient operation of the heating system.

[0015] The heat storage system of the present invention has high flexibility and adaptability, and can be flexibly deployed on the primary pipeline network inside or outside the heat source station according to different engineering scenarios and actual needs. The modular and customizable installation solution broadens the application scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a process flow of a first embodiment of a clean energy hot water supply and heat storage system proposed by the present invention; Figure 2 This is a schematic diagram of the process of Embodiment 2 of a clean energy hot water supply and heat storage system proposed by the present invention; Figure 3 This is a schematic diagram of the process of Embodiment 3 of a clean energy hot water supply and heat storage system proposed by the present invention; Figure 4 This is a schematic flow chart of a fourth embodiment of a clean energy hot water supply and heat storage system proposed by the present invention.

[0017] In the figure: 1. The first stop valve; 2. The second stop valve; 3. The water storage tank; 4. The water storage pump; 5. The third stop valve; 6. The plate heat exchanger; 7. The temperature sensor; 8. The electric regulating valve; 9. The secondary pipe network circulation pump; 10. The secondary pipe network water supply pipe; 11. The secondary pipe network return pipe; 12. The secondary pipe network bypass pipe; 13. The primary pipe network return pipe; 14. The primary pipe network water supply pipe; 15. The primary pipe network circulation pump; 16. The first heat pump unit; 17. The second heat pump unit; 18. The water storage tank unit; 19. The primary pipe network water supply bypass pipe; 20. The first bypass pipe of the primary pipe network return water; 21. The second bypass pipe of the primary pipe network return water; 22. The third bypass pipe of the primary pipe network return water. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] A clean energy hot water heat storage system includes a heat storage system, a heat exchange station, a heat source station, a primary pipe network and a secondary pipe network. In the present invention, it is known to those skilled in the art that the heat storage system can release the stored heat energy to meet the demand when the demand for heat energy is at a peak or when there is a shortage of electricity, so as to solve the problem of mismatch between the supply and demand of heat energy in time, space or intensity. The heat exchange station converts the high-temperature hot water or steam in the primary heat network into low-temperature hot water suitable for heat users, and transports the heat energy to the heat users through the secondary pipe network to achieve the conversion and transmission of heat energy. The heat source station is a system or device that converts heat energy into a form suitable for heat users and transports it to the heat user end through the primary pipe network and the secondary pipe network. Among them, the primary pipe network is a pipe network system between the heat source station and the heat exchange station of the heat storage system. Its main function is to transport the high-temperature hot water generated by the heat source to the heat exchange station. The high-temperature hot water exchanges heat with the water in the secondary pipe network in the heat exchange station, thereby transferring heat. The secondary pipe network is a pipe network system connecting the heat exchange station and the heat user room.

[0021] Reference Figure 1-4In the present invention, the primary pipe network includes a primary pipe network water supply pipe 14, a primary pipe network water supply bypass pipe 19, a primary pipe network return pipe 13, a primary pipe network return first bypass pipe 20, a primary pipe network return second bypass pipe 21 and a primary pipe network return third bypass pipe 22, and the secondary pipe network includes a secondary pipe network water supply pipe 10 and a secondary pipe network return pipe 11.

[0022] The heat exchange station includes a plate heat exchanger 6, a temperature sensor 7, an electric regulating valve 8, a secondary pipe network circulation pump 9 and a secondary pipe network bypass pipe 12, wherein the heat exchange station includes: a plate heat exchanger 6, a temperature sensor 7, an electric regulating valve 8, a secondary pipe network circulation pump 9, a secondary pipe network bypass pipe 12, wherein: one end of the secondary pipe network return pipe 11 is connected to the plate heat exchanger 6, and the other end is connected to the heat user; one end of the secondary pipe network water supply pipe 10 is connected to the plate heat exchanger 6, and the other end is connected to the heat user; one end of the secondary pipe network bypass pipe 12 is connected to the secondary pipe network water supply pipe 10, and the other end is connected to the secondary pipe network return pipe 11; the temperature sensor 7 is arranged on the secondary pipe network water supply pipe 10; the electric regulating valve 8 is arranged on the secondary pipe network bypass pipe 12; the secondary pipe network circulation pump 9 is arranged on the secondary pipe network return pipe 11.

[0023] Embodiment 1 In this embodiment, the heat storage system includes a stop valve group, a water storage tank 3 and a water storage pump 4. The stop valve group includes a first stop valve 1, a second stop valve 2 and a third stop valve 5. The heat storage system is arranged on a primary pipe network in a heat source station.

[0024] The heat source station includes a primary pipe network circulation pump 15, a first heat pump unit 16 and a second heat pump unit 17. The first heat pump unit 16 and the second heat pump unit 17 are arranged in parallel through a primary pipe network return pipe 13 and a primary pipe network water supply pipe 14. One end of the primary pipe network return pipe 13 is respectively connected to the first heat pump unit 16 and the second heat pump unit 17, and the other end is connected to the plate heat exchanger 6; one end of the primary pipe network water supply pipe 14 is respectively connected to the first heat pump unit 16 and the second heat pump unit 17, and the other end is connected to the plate heat exchanger 6; one end of the primary pipe network water supply bypass pipe 19 is connected to the primary pipe network water supply pipe 14, and the other end is connected to the heat inlet and outlet of the water storage tank 3. One end of the first bypass pipe 20 for pipe network return water is connected to the primary pipe network water supply bypass pipe 19, and the other end is connected to the primary pipe network return water pipe 13. One end of the third bypass pipe 22 for primary pipe network return water is connected to the water storage tank 3, and the other end is connected to the primary pipe network return water pipe 13. One end of the second bypass pipe 21 for primary pipe network return water is connected to the third bypass pipe 22 for primary pipe network return water, and the other end is connected to the primary pipe network return water pipe 13. The connection sequence on the primary pipe network return water pipe 13 is the first heat pump unit 16 and the second heat pump unit 17, the first bypass pipe 20 for primary pipe network return water, the second bypass pipe 21 for primary pipe network return water, the third bypass pipe 22 for primary pipe network return water, and the plate heat exchanger 6.

[0025] The primary network circulation pump 15 is arranged on the primary network return pipe 13 and is located between the connection point between the primary network return first bypass pipe 20 and the primary network return pipe 13 and the connection point between the primary network return second bypass pipe 21 and the primary network return pipe 13.

[0026] The first stop valve 1 is arranged on the primary pipe network water supply bypass pipe 19 at the hot inlet and outlet of the water storage tank 3, and is located between the connection point of the primary pipe network return water first bypass pipe 20 and the primary pipe network water supply bypass pipe 19 and the connection point of the primary pipe network water supply pipe 14 and the primary pipe network water supply bypass pipe 19; the second stop valve 2 is arranged on the primary pipe network return water first bypass pipe 20; the third stop valve 5 is arranged on the primary pipe network return water third bypass pipe 22, and is located between the connection point of the primary pipe network return water third bypass pipe 22 and the primary pipe network return water second bypass pipe 21 and the connection point of the primary pipe network return water third bypass pipe 22 and the primary pipe network return water pipe 13.

[0027] During off-peak electricity prices, the first heat pump unit 16 and the second heat pump unit 17 are fully loaded, and the first stop valve 1 and the third stop valve 5 are appropriately opened, so that a part of the hot water in the primary pipe network enters the water storage tank 3 to store heat, and the other part of the hot water in the primary pipe network enters the heat exchange station to meet the heating demand on the user side; during flat electricity prices, according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, the output of the first heat pump unit 16 and the second heat pump unit 17 is controlled, and the opening of the first stop valve 1 and the third stop valve 5 is controlled to adjust Save the amount of heat stored in the water storage tank 3; during peak electricity prices, reduce or shut down the first heat pump unit 16 and the second heat pump unit 17 according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, close the first stop valve 1 and the third stop valve 5, open the second stop valve 2 and the water storage pump 4, and allow the hot water stored in the water storage tank 3 to enter the primary pipe network circulation to realize the heat release process of the heat storage system; in the heat exchange station, the water supply temperature in the secondary pipe network water supply pipe 10 is controlled by the temperature sensor 7 and the electric regulating valve 8 to ensure the stability of heating on the user side.

[0028] Embodiment 2 In this embodiment, the heat storage system is arranged on the primary pipe network in the heat source station, and the water storage tank 3 in the first embodiment is replaced by a water storage tank group 18, and the water storage tank group 18 is composed of a plurality of water storage tanks 3 connected in series, in parallel, or in series-parallel. During off-peak electricity prices, the first heat pump unit 16 and the second heat pump unit 17 are fully loaded, and the first stop valve 1 and the third stop valve 5 are appropriately opened, so that a part of the hot water in the primary pipe network enters the water storage tank group 18 to store heat, and the other part of the hot water in the primary pipe network enters the heat exchange station to meet the heating demand on the user side; during flat electricity prices, according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, the output of the first heat pump unit 16 and the second heat pump unit 17 is controlled, and the opening of the first stop valve 1 and the third stop valve 5 is controlled to adjust The heat storage capacity of the water storage tank group 18; during peak electricity prices, according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, the first heat pump unit 16 and the second heat pump unit 17 are reduced or shut down, the first stop valve 1 and the third stop valve 5 are closed, the second stop valve 2 and the water storage pump 4 are opened, and the hot water stored in the water storage tank group 18 enters the primary pipe network circulation to realize the heat release process of the heat storage system; in the heat exchange station, the water supply temperature in the secondary pipe network water supply pipe 10 is controlled by the temperature sensor 7 and the electric regulating valve 8 to ensure the stability of heating on the user side.

[0029] Embodiment 3 In this embodiment, the heat storage system includes a stop valve group, a water storage tank 3 and a water storage pump 4, the stop valve group includes a first stop valve 1 and a third stop valve 5, and the heat storage system is arranged on a primary pipe network in a heat source station; In this embodiment, the primary pipe network includes and only includes a primary pipe network water supply pipe 14, a primary pipe network water supply bypass pipe 19, a primary pipe network return pipe 13, a primary pipe network return water second bypass pipe 21 and a primary pipe network return water third bypass pipe 22; The heat source station includes a primary pipe network circulation pump 15, a first heat pump unit 16 and a second heat pump unit 17. The first heat pump unit 16 and the second heat pump unit 17 are arranged in parallel through a primary pipe network return pipe 13 and a primary pipe network water supply pipe 14. One end of the primary pipe network return pipe 13 is connected to the first heat pump unit 16 and the second heat pump unit 17 respectively, and the other end is connected to the plate heat exchanger 6; one end of the primary pipe network water supply pipe 14 is connected to the first heat pump unit 16 and the second heat pump unit 17 respectively, and the other end is connected to the plate heat exchanger 6; one end of the primary pipe network water supply bypass pipe 19 is connected to a The secondary network water supply pipe 14 is connected, and the other end is connected to the heat inlet and outlet of the water storage tank 3. One end of the primary network return water third bypass pipe 22 is connected to the water storage tank 3, and the other end is connected to the primary network return water pipe 13. One end of the primary network return water second bypass pipe 21 is connected to the primary network return water third bypass pipe 22, and the other end is connected to the primary network return water pipe 13. The connection sequence on the primary network return water pipe 13 is the first heat pump unit 16, the second heat pump unit 17, the primary network return water second bypass pipe 21, the primary network return water third bypass pipe 22, and the plate heat exchanger 6.

[0030] The primary pipe network circulation pump 15 is arranged on the primary pipe network return pipe 13, and is located between the connection point of the first heat pump unit 16 and the primary pipe network return pipe 13 and the connection point of the primary pipe network return second bypass pipe 21 and the primary pipe network return pipe 13, and is located between the connection point of the second heat pump unit 17 and the primary pipe network return pipe 13 and the connection point of the primary pipe network return second bypass pipe 21 and the primary pipe network return pipe 13; The first stop valve 1 is arranged on the primary pipe network water supply bypass pipe 19 at the hot inlet and outlet of the water storage tank 3, and is located between the connection point between the primary pipe network water supply pipe 14 and the primary pipe network water supply bypass pipe 19 and the water storage tank 3; the third stop valve 5 is arranged on the primary pipe network return water third bypass pipe 22, and is located between the connection point between the primary pipe network return water third bypass pipe 22 and the primary pipe network return water second bypass pipe 21 and the connection point between the primary pipe network return water third bypass pipe 22 and the primary pipe network return water pipe 13.

[0031] During off-peak electricity prices, the first heat pump unit 16 and the second heat pump unit 17 are fully loaded, and the first stop valve 1 and the third stop valve 5 are appropriately opened, so that a part of the hot water in the primary pipe network enters the water storage tank 3 to store heat, and another part of the hot water in the primary pipe network enters the heat exchange station to meet the heating demand on the user side; during flat electricity prices, the output of the first heat pump unit 16 and the second heat pump unit 17 is controlled according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, and the opening of the first stop valve 1 and the third stop valve 5 is controlled. Adjust the heat storage amount of the water storage tank 3; during peak electricity prices, reduce or shut down the first heat pump unit 16 and the second heat pump unit 17 according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, close the third stop valve 5, open the water storage pump 4, and control the opening of the first stop valve 1, so that the hot water stored in the water storage tank 3 enters the primary pipe network circulation to realize the heat release process of the heat storage system; in the heat exchange station, the water supply temperature in the secondary pipe network water supply pipe 10 is controlled by the temperature sensor 7 and the electric regulating valve 8 to ensure the stability of heating on the user side.

[0032] Embodiment 4 In this embodiment, the heat storage system includes a stop valve group, a water storage tank 3 and a water storage pump 4. The stop valve group includes a first stop valve 1, a second stop valve 2 and a third stop valve 5. The heat storage system is arranged on a primary pipe network outside the heat source station.

[0033] The heat source station includes a primary pipe network circulation pump 15, a first heat pump unit 16 and a second heat pump unit 17. The first heat pump unit 16 and the second heat pump unit 17 are arranged in parallel through a primary pipe network return pipe 13 and a primary pipe network water supply pipe 14. One end of the primary pipe network return pipe 13 is respectively connected to the first heat pump unit 16 and the second heat pump unit 17, and the other end is connected to the plate heat exchanger 6; one end of the primary pipe network water supply pipe 14 is respectively connected to the first heat pump unit 16 and the second heat pump unit 17, and the other end is connected to the plate heat exchanger 6; one end of the primary pipe network water supply bypass pipe 19 is connected to the primary pipe network water supply pipe 14, and the other end is connected to the heat inlet and outlet of the water storage tank 3. One end of the first bypass pipe 20 for pipe network return water is connected to the primary pipe network water supply bypass pipe 19, and the other end is connected to the primary pipe network return water pipe 13. One end of the third bypass pipe 22 for primary pipe network return water is connected to the water storage tank 3, and the other end is connected to the primary pipe network return water pipe 13. One end of the second bypass pipe 21 for primary pipe network return water is connected to the third bypass pipe 22 for primary pipe network return water, and the other end is connected to the primary pipe network return water pipe 13. The connection sequence on the primary pipe network return water pipe 13 is the first heat pump unit 16 and the second heat pump unit 17, the first bypass pipe 20 for primary pipe network return water, the second bypass pipe 21 for primary pipe network return water, the third bypass pipe 22 for primary pipe network return water, and the plate heat exchanger 6.

[0034] The primary network circulation pump 15 is arranged on the primary network return pipe 13 and is located between the connection point between the primary network return first bypass pipe 20 and the primary network return pipe 13 and the connection point between the primary network return second bypass pipe 21 and the primary network return pipe 13.

[0035] The first stop valve 1 is arranged on the primary pipe network water supply bypass pipe 19 at the hot inlet and outlet of the water storage tank 3, and is located between the connection point of the primary pipe network return water first bypass pipe 20 and the primary pipe network water supply bypass pipe 19 and the connection point of the primary pipe network water supply pipe 14 and the primary pipe network water supply bypass pipe 19; the second stop valve 2 is arranged on the primary pipe network return water first bypass pipe 20; the third stop valve 5 is arranged on the primary pipe network return water third bypass pipe 22, and is located between the connection point of the primary pipe network return water third bypass pipe 22 and the primary pipe network return water second bypass pipe 21 and the connection point of the primary pipe network return water third bypass pipe 22 and the primary pipe network return water pipe 13.

[0036] During off-peak electricity prices, the first heat pump unit 16 and the second heat pump unit 17 are fully loaded, and the first stop valve 1 and the third stop valve 5 are appropriately opened, so that a part of the hot water in the primary pipe network enters the water storage tank 3 to store heat, and the other part of the hot water in the primary pipe network enters the heat exchange station to meet the heating demand on the user side; during flat electricity prices, according to factors such as the heating efficiency of clean energy, the heat load demand on the user side, and the heat storage capacity of the heat storage system, the output of the first heat pump unit 16 and the second heat pump unit 17 is controlled, the opening of the first stop valve 1 and the third stop valve 5 is controlled, and the heat storage capacity of the water storage tank 3 is adjusted; during peak electricity prices, according to the clean energy heating efficiency, the heat load demand on the user side, and the heat storage capacity of the heat storage system, the output of the first heat pump unit 16 and the second heat pump unit 17 is controlled, and the opening of the first stop valve 1 and the third stop valve 5 is controlled to adjust the heat storage capacity of the water storage tank 3. Based on factors such as energy heating efficiency, user-side heat load demand, and heat storage capacity of the heat storage system, the first heat pump unit 16 and the second heat pump unit 17 are unloaded or shut down, the first stop valve 1 and the third stop valve 5 are closed, the second stop valve 2 and the water storage pump 4 are opened, and the hot water stored in the water storage tank 3 enters the primary pipe network circulation to realize the heat release process of the heat storage system; in the heat exchange station, the water supply temperature in the secondary pipe network water supply pipe 10 is controlled by the temperature sensor 7 and the electric regulating valve 8 to ensure the stability of heating on the user side; the heat storage system can be arranged at any advantageous position along the primary pipe network according to the actual project situation and local conditions.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A clean energy hot water supply and heat storage system, characterized in that: It includes a heat storage system, a heat exchange station, a heat source station, a primary pipe network and a secondary pipe network, wherein the heat storage system is arranged on the primary pipe network outside or inside the heat source station; The primary pipe network comprises a primary pipe network water supply pipe (14), a primary pipe network water supply bypass pipe (19), a primary pipe network water return pipe (13), a primary pipe network water return first bypass pipe (20), a primary pipe network water return second bypass pipe (21) and a primary pipe network water return third bypass pipe (22), and the secondary pipe network comprises a secondary pipe network water supply pipe (10) and a secondary pipe network water return pipe (11).

2. A clean energy hot water supply and heat storage system according to claim 1, characterized in that: The heat exchange station comprises a plate heat exchanger (6), a temperature sensor (7), an electric regulating valve (8), a secondary pipe network circulation pump (9), and a secondary pipe network bypass pipe (12), wherein: one end of the secondary pipe network return pipe (11) is connected to the plate heat exchanger (6), and the other end is connected to the heat user; One end of the secondary pipe network water supply pipe (10) is connected to the plate heat exchanger (6), and the other end is connected to the heat user; one end of the secondary pipe network bypass pipe (12) is connected to the secondary pipe network water supply pipe (10), and the other end is connected to the secondary pipe network return pipe (11); the temperature sensor (7) is arranged on the secondary pipe network water supply pipe (10); the electric regulating valve (8) is arranged on the secondary pipe network bypass pipe (12); and the secondary pipe network circulation pump (9) is arranged on the secondary pipe network return pipe (11).

3. A clean energy hot water supply and heat storage system according to claim 2, characterized in that: The heat storage system comprises a stop valve group, a water storage tank (3) and a water storage pump (4), the stop valve group comprises a first stop valve (1), a second stop valve (2) and a third stop valve (5), and the heat storage system is arranged on a primary pipe network in a heat source station; The heat source station comprises a primary pipe network circulation pump (15), a first heat pump unit (16) and a second heat pump unit (17); the first heat pump unit (16) and the second heat pump unit (17) are arranged in parallel via a primary pipe network return pipe (13) and a primary pipe network water supply pipe (14); one end of the primary pipe network return pipe (13) is respectively connected to the first heat pump unit (16) and the second heat pump unit (17), and the other end is connected to the plate heat exchanger (6); one end of the primary pipe network water supply pipe (14) is respectively connected to the first heat pump unit (16) and the second heat pump unit (17), and the other end is connected to the plate heat exchanger (6); one end of the primary pipe network water supply bypass pipe (19) is connected to the primary pipe network water supply pipe (14), and the other end is connected to the heat inlet and outlet of the water storage tank (3) , one end of the first bypass pipe (20) of the primary pipe network return water is connected to the primary pipe network water supply bypass pipe (19), and the other end is connected to the primary pipe network return water pipe (13); one end of the third bypass pipe (22) of the primary pipe network return water is connected to the water storage tank (3), and the other end is connected to the primary pipe network return water pipe (13); one end of the second bypass pipe (21) of the primary pipe network return water is connected to the third bypass pipe (22) of the primary pipe network return water, and the other end is connected to the primary pipe network return water pipe (13); the connection sequence on the primary pipe network return water pipe (13) is the first heat pump unit (16) and the second heat pump unit (17), the first bypass pipe (20) of the primary pipe network return water, the second bypass pipe (21) of the primary pipe network return water, the third bypass pipe (22) of the primary pipe network return water, and the plate heat exchanger (6); The primary pipe network circulation pump (15) is arranged on the primary pipe network return pipe (13), and is located between the connection point of the primary pipe network return water first bypass pipe (20) and the primary pipe network return water pipe (13) and the connection point of the primary pipe network return water second bypass pipe (21) and the primary pipe network return water pipe (13); The first stop valve (1) is arranged on the primary pipe network water supply bypass pipe (19) at the hot inlet and outlet of the water storage tank (3), and is located between the connection point of the primary pipe network return water first bypass pipe (20) and the primary pipe network water supply bypass pipe (19) and the connection point of the primary pipe network water supply pipe (14) and the primary pipe network water supply bypass pipe (19); the second stop valve (2) is arranged on the primary pipe network return water first bypass pipe (20); the third stop valve (5) is arranged on the primary pipe network return water third bypass pipe (22), and is located between the connection point of the primary pipe network return water third bypass pipe (22) and the primary pipe network return water second bypass pipe (21) and the connection point of the primary pipe network return water third bypass pipe (22) and the primary pipe network return water pipe (13).

4. A clean energy hot water supply and heat storage system according to claim 3, characterized in that: The water storage tank (3) can be replaced by a water storage tank group (18), and the water storage tank group (18) is composed of a plurality of water storage tanks (3).

5. A clean energy hot water supply and heat storage system according to claim 2, characterized in that: The heat storage system comprises a stop valve group, a water storage tank (3) and a water storage pump (4); the stop valve group comprises a first stop valve (1), a second stop valve (2) and a third stop valve (5); the heat storage system is arranged on a primary pipe network outside a heat source station; The heat source station comprises a primary pipe network circulation pump (15), a first heat pump unit (16) and a second heat pump unit (17); the first heat pump unit (16) and the second heat pump unit (17) are arranged in parallel via a primary pipe network return pipe (13) and a primary pipe network water supply pipe (14); one end of the primary pipe network return pipe (13) is respectively connected to the first heat pump unit (16) and the second heat pump unit (17), and the other end is connected to the plate heat exchanger (6); one end of the primary pipe network water supply pipe (14) is respectively connected to the first heat pump unit (16) and the second heat pump unit (17), and the other end is connected to the plate heat exchanger (6); one end of the primary pipe network water supply bypass pipe (19) is connected to the primary pipe network water supply pipe (14), and the other end is connected to the heat inlet and outlet of the water storage tank (3) , one end of the first bypass pipe (20) of the primary pipe network return water is connected to the primary pipe network water supply bypass pipe (19), and the other end is connected to the primary pipe network return water pipe (13); one end of the third bypass pipe (22) of the primary pipe network return water is connected to the water storage tank (3), and the other end is connected to the primary pipe network return water pipe (13); one end of the second bypass pipe (21) of the primary pipe network return water is connected to the third bypass pipe (22) of the primary pipe network return water, and the other end is connected to the primary pipe network return water pipe (13); the connection sequence on the primary pipe network return water pipe (13) is the first heat pump unit (16) and the second heat pump unit (17), the first bypass pipe (20) of the primary pipe network return water, the second bypass pipe (21) of the primary pipe network return water, the third bypass pipe (22) of the primary pipe network return water, and the plate heat exchanger (6); The primary pipe network circulation pump (15) is arranged on the primary pipe network return pipe (13), and is located between the connection point of the primary pipe network return water first bypass pipe (20) and the primary pipe network return water pipe (13) and the connection point of the primary pipe network return water second bypass pipe (21) and the primary pipe network return water pipe (13); The first stop valve (1) is arranged on the primary pipe network water supply bypass pipe (19) at the hot inlet and outlet of the water storage tank (3), and is located between the connection point of the primary pipe network return water first bypass pipe (20) and the primary pipe network water supply bypass pipe (19) and the connection point of the primary pipe network water supply pipe (14) and the primary pipe network water supply bypass pipe (19); the second stop valve (2) is arranged on the primary pipe network return water first bypass pipe (20); the third stop valve (5) is arranged on the primary pipe network return water third bypass pipe (22), and is located between the connection point of the primary pipe network return water third bypass pipe (22) and the primary pipe network return water second bypass pipe (21) and the connection point of the primary pipe network return water third bypass pipe (22) and the primary pipe network return water pipe (13).

Images