Water energy storage cooling and heating system based on electric driving and energy system

Abstract

The utility model provides a water energy storage cooling and heating system based on electric driving and an energy system. The system comprises a plurality of water storage tanks, a four-pipe pipeline system, a control system, and a cold storage centrifugal water chilling unit refrigerating system, a heat storage electric boiler heating system, an air-cooled heat pump unit refrigerating and heating system and a water-water heat pump unit refrigerating and heating system which are in communication connection with the control system, the cold accumulation centrifugal water chilling unit refrigerating system is used for refrigerating under the driving of a first instruction of the control system; the heat accumulating type electric boiler heating system is used for heating under the driving of a second instruction of the control system; the air-cooled heat pump unit refrigerating and heating system is used for heating under the driving of a third instruction of the control system; and the water-water heat pump unit refrigerating and heating system is used for refrigerating under the driving of a fourth instruction of the control system, or refrigerating and heating under the driving of a fifth instruction of the control system. The system has the capacity of cold storage in summer, heat storage in winter and cold storage and heat storage at the same time, and the utilization rate of the system is increased.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of integrated energy application, in particular to a water storage cooling and heating system based on electric drive and an energy system. BACKGROUND

[0002] Based on the increasingly severe energy and environmental pressure, it is recognized that energy efficiency improvement of regional energy systems is an effective way. In the field of building energy in China, regional energy systems for secondary energy production and supply (especially for building heating and cooling) are emerging and practicing. The regional energy system for secondary energy production and supply is significantly higher than the primary energy utilization efficiency of traditional building energy system, which reduces the consumption of fossil energy and the emission of regional carbon and related pollutants.

[0003] At present, many environments are restricted by high energy consumption and great environmental pressure. In hot summer and cold winter regions, buildings have a large heat load demand in winter. The traditional energy station still mostly uses gas as a primary energy source (such as gas boilers and three-in-one supply units) as the main heating source, which on the one hand causes great environmental pollution and carbon emission pressure, and on the other hand has poor energy use economy. CONTENT OF THE INVENTION

[0004] The technical problem to be solved by the present disclosure is to overcome the defects of poor energy use economy and great environmental pollution and carbon emission pressure of the traditional energy station in the prior art, and to provide a water storage cooling and heating system based on electric drive and an energy system.

[0005] The present disclosure solves the above technical problems by the following technical solutions:

[0006] According to a first aspect of the present disclosure, a water storage cooling and heating system based on electric drive is provided, which comprises a plurality of water storage tanks, a four-pipe system, a control system, and a cold water storage centrifugal chiller refrigeration system, a heat storage electric boiler heating system, an air-cooled heat pump unit refrigeration and heating system, and a water-water heat pump unit refrigeration and heating system in communication connection with the control system.

[0007] The cold water storage centrifugal chiller refrigeration system, the heat storage electric boiler heating system, the air-cooled heat pump unit refrigeration and heating system, and the water-water heat pump unit refrigeration and heating system are respectively connected with the water storage tanks and the four-pipe system through pipes to form a cooling storage path and a heating storage path.

[0008] The cold water storage centrifugal chiller refrigeration system is used for refrigeration under the drive of the first instruction of the control system.

[0009] The heat accumulating electric boiler heating system is used for heating under the driving of the second instruction of the control system.

[0010] The air-cooled heat pump unit refrigeration and heating system is used for heating under the driving of the third instruction of the control system.

[0011] The water-water heat pump unit refrigeration and heating system is used for refrigeration under the driving of the fourth instruction of the control system, or simultaneous refrigeration and heating under the driving of the fifth instruction of the control system.

[0012] Optionally, the water-water heat pump unit refrigeration and heating system comprises a water-water heat pump unit and a first cooling tower; the water-water heat pump unit comprises a first upper structure and a first lower structure.

[0013] The first upper structure forms a cooling loop with the first cooling tower through a pipeline;

[0014] The first upper structure is also communicated with the water storage tank and the four-pipe duct system through a pipeline to form the heat storage passage for heating;

[0015] The first lower structure is communicated with the water storage tank and the four-pipe duct system through a pipeline to form the cold storage passage for cooling;

[0016] The water-water heat pump unit refrigeration and heating system is used for receiving the fourth instruction, opening the cooling loop and the cold storage passage for cooling, closing the heat storage passage for heating, and driving the first cooling tower and the water-water heat pump unit to refrigerate;

[0017] The water-water heat pump unit refrigeration and heating system is used for receiving the fifth instruction, closing the cooling loop, opening the cold storage passage for cooling and the heat storage passage for heating, and driving the water-water heat pump unit to simultaneously refrigerate and heat.

[0018] Optionally, the four-pipe duct system comprises a cold water supply collector and a cold water supply distributor.

[0019] The cold water supply collector is used for delivering high-temperature chilled water on the user side to the cold storage centrifugal water chiller refrigeration system and / or the water-water heat pump unit refrigeration and heating system;

[0020] The cold water supply distributor is used for delivering low-temperature chilled water of the cold storage centrifugal water chiller refrigeration system and / or the water-water heat pump unit refrigeration and heating system to the user side;

[0021] The cold water supply collector is also used for delivering high-temperature chilled water on the upper layer of the water storage tank to the cold storage centrifugal water chiller refrigeration system and / or the water-water heat pump unit refrigeration and heating system;

[0022] The cold water supply distributor is also used to transmit low-temperature chilled water of the cold water storage centrifugal chiller refrigeration system and / or the water-water heat pump unit refrigeration and heating system to the lower layer of the water storage tank;

[0023] and / or,

[0024] The four-pipe piping system comprises a heat supply header and a heat supply distributor;

[0025] The heat supply header is used to deliver low-temperature hot water on the user side to the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system;

[0026] The heat supply distributor is used to transmit high-temperature hot water of the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system to the user side;

[0027] The heat supply header is also used to deliver low-temperature hot water in the lower layer of the water storage tank to the heat storage electric boiler heating system and / or the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system;

[0028] The heat supply distributor is also used to transmit high-temperature hot water of the heat storage electric boiler heating system and / or the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system to the lower layer of the water storage tank.

[0029] Optionally, the water-water heat pump unit refrigeration and heating system further comprises a water-water heat pump chilled water pump and a water-water heat pump cooling pump, and the four-pipe piping system further comprises a cold water secondary pump;

[0030] The first upper layer structure is provided with a condenser, and the first lower layer structure is provided with an evaporator;

[0031] The cold water header, the water-water heat pump chilled water pump, the first lower layer structure, the cold water distributor and the cold water secondary pump form a cold water passage;

[0032] The first upper layer structure, the first cooling tower, the water-water heat pump cooling pump and the first upper layer structure form the cooling loop through pipes;

[0033] The water-water heat pump chilled water pump is used to control the water temperature of high-temperature chilled water delivered to the first lower layer structure, and the high-temperature chilled water outputs low-temperature chilled water after being cooled via the evaporator.

[0034] Optionally, the water storage tank comprises a first water storage tank and a second water storage tank, and the four-pipe piping system further comprises a heat supply secondary pump;

[0035] The heat supply collector, the water-water heat pump cooling pump, the first upper structure, the heat supply distributor, the heat supply secondary pump form a heat supply path;

[0036] The first water storage tank, the cooling water collector, the water-water heat pump cooling pump, the first lower structure, the cooling water distributor, the first water storage tank form a cooling storage circulation path;

[0037] The second water storage tank, the heat supply collector, the water-water heat pump cooling pump, the first upper structure, the heat supply distributor, the second water storage tank form a heat storage circulation path;

[0038] The water-water heat pump cooling pump is used for controlling the water temperature of low-temperature hot water delivered into the first upper structure, and the low-temperature hot water outputs high-temperature hot water after heating via the condenser.

[0039] Optionally, a first electrically-operated on-off valve is arranged on the pipeline of the first upper structure and the first cooling tower, a second electrically-operated on-off valve is arranged on the pipeline of the first cooling tower and the water-water heat pump cooling pump;

[0040] A third electrically-operated on-off valve is arranged on the pipeline of the heat supply collector and the water-water heat pump cooling pump, and a fourth electrically-operated on-off valve is arranged on the pipeline of the heat supply distributor and the first upper structure;

[0041] The water-water heat pump unit refrigeration and heating system is configured to receive the fourth instruction, drive the first electrically-operated on-off valve and the second electrically-operated on-off valve to open, and drive the third electrically-operated on-off valve and the fourth electrically-operated on-off valve to close;

[0042] The water-water heat pump unit refrigeration and heating system is configured to receive the fifth instruction, drive the first electrically-operated on-off valve and the second electrically-operated on-off valve to close, and drive the third electrically-operated on-off valve and the fourth electrically-operated on-off valve to open.

[0043] Optionally, the cold storage centrifugal water chiller refrigeration system comprises a cold storage centrifugal water chiller, a cold storage unit chilled water pump, a cold storage unit cooling water pump and a second cooling tower, and the four-pipe pipeline system further comprises a cooling secondary pump;

[0044] The cold storage centrifugal water chiller comprises a second upper structure and a second lower structure;

[0045] The second upper structure, the second cooling tower and the cold storage unit cooling water pump, and the second upper structure form a cooling loop through pipelines, and the cooling loop is used for cooling the second lower structure;

[0046] The cooling water collector, the cold storage unit chilled water pump, the second lower structure, the cooling water distributor, and the cooling secondary pump form a cooling path.

[0047] The water storage tank, the heating water collector, the chilled water pump of the cold storage unit, the second lower structure, the heating water distributor, and the water storage tank form a cold storage circulation passage.

[0048] The chilled water pump of the cold storage unit is configured to control the water temperature of high-temperature chilled water delivered into the second lower structure, and the high-temperature chilled water is cooled via the second upper structure to output low-temperature chilled water.

[0049] Optionally, the heat storage electric boiler heating system comprises a heat storage electric boiler and a hot water circulating pump, and the four-pipe system further comprises a heating secondary pump.

[0050] The water storage tank, the heating water collector, the hot water circulating pump, the heat storage electric boiler, the heating water distributor, and the water storage tank form a heat storage circulation passage.

[0051] The hot water circulating pump is configured to control the water temperature of low-temperature hot water delivered into the heat storage electric boiler, and the low-temperature hot water is heated via the heat storage electric boiler to output high-temperature hot water.

[0052] and / or,

[0053] The air-cooled heat pump unit refrigeration and heating system comprises a screw air-cooled heat pump unit, a water-water plate heat exchanger, a heat pump heat exchanger secondary side circulating pump, and a heat pump heat exchanger primary side circulating pump.

[0054] The heating water collector, the heat pump heat exchanger secondary side circulating pump, the water-water plate heat exchanger, the heating water distributor, and the heating secondary pump form a heating passage.

[0055] The water storage tank, the heating water collector, the heat pump heat exchanger secondary side circulating pump, the water-water plate heat exchanger, the heating water distributor, and the water storage tank form a heat storage circulation passage.

[0056] The screw air-cooled heat pump unit, the water-water plate heat exchanger, and the heat pump heat exchanger primary side circulating pump form a heating passage through pipes, and the heating passage is configured to heat the primary side circulating water.

[0057] The heat pump heat exchanger secondary side circulating pump is configured to control the water temperature of low-temperature hot water delivered into the water-water plate heat exchanger, and the water-water plate heat exchanger exchanges heat with the low-temperature hot water under the action of the primary side circulating water to output high-temperature hot water.

[0058] Optionally, the four-pipe system further comprises a cold user side differential pressure sensor, a heating user side differential pressure sensor, a cold balance pipe target flow switch, a heating balance pipe bypass electric regulating valve, a heating balance pipe target flow switch, a cold balance pipe flow meter, a heating balance pipe flow meter, a cold energy meter, and a heating energy meter.

[0059] According to a second aspect of the present disclosure, an energy system is provided, which comprises the power-driven water storage cooling and heating system according to the first aspect of the present disclosure.

[0060] The positive progress effect of the present disclosure is that the cold and heat source equipment of the power-driven water storage cooling and heating system of the present disclosure adopts a full power driving mode. Under the background of increasing green electricity proportion in the power grid year by year, the carbon emission index of the system is reduced year by year, which adapts to the development trend of energy utilization electrification. The power-driven water storage cooling and heating system also carries out water storage cooling and heating, combines with the four-pipe system to provide cooling and heating at the same time, fully utilizes the annual peak-valley electricity price difference, carries out simultaneous storage cooling and heating at night when the electricity price is low, maximizes the reduction of system operation cost, greatly improves the economy of the energy supply area system, effectively improves the regional environment, and has the ability of summer storage cooling, winter storage heating, and simultaneous storage cooling and heating, thereby improving the utilization rate of the water storage system. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 FIG. 1 is a first structural schematic diagram of the power-driven water storage cooling and heating system of the present disclosure;

[0062] Figure 2 FIG. 2 is a second structural schematic diagram of the power-driven water storage cooling and heating system of the present disclosure;

[0063] Figure 3 FIG. 3 is a third structural schematic diagram of the power-driven water storage cooling and heating system of the present disclosure;

[0064] Figure 4 FIG. 4 is a fourth structural schematic diagram of the power-driven water storage cooling and heating system of the present disclosure.

[0065] Explanation of reference signs: 1- water storage tank, 11- first water storage tank, 12- second water storage tank, 2- four-pipe pipe system, 201- cold water supply collector, 202- cold water supply distributor, 203- hot water supply collector, 204- hot water supply distributor, 205- cold user side differential pressure sensor, 206- hot user side differential pressure sensor, 207- cold balance pipe target type flow switch, 208- hot balance pipe bypass electric regulating valve, 209- hot balance pipe target type flow switch, 210- cold balance pipe flow meter, 211- hot balance pipe flow meter, 212- hot secondary pump, 213- cold secondary pump, 214- cold energy meter, 215- hot energy meter, 3- centrifugal water chiller refrigeration system, 31- centrifugal water chiller, 311- second upper structure, 312- second lower structure, 32- chilled water pump of cold storage unit, 33- cooling water pump of cold storage unit, 34- second cooling tower, 4- electric boiler heating system, 41- electric boiler, 42- hot water circulating pump, 5- air-cooled heat pump unit refrigeration and heating system, 51- screw air-cooled heat pump unit, 52- water-water plate heat exchanger, 53- heat pump heat exchanger secondary side circulating pump, 54- heat pump heat exchanger primary side circulating pump, 6- water-water heat pump unit refrigeration and heating system, 61- water-water heat pump unit, 611- first upper structure 611, 612- first lower structure, 6111- condenser, 6121- evaporator, 62- first cooling tower, 63- chilled water pump of water-water heat pump, 64- cooling pump of water-water heat pump, V1- first electrically operated on-off valve, V2- second electrically operated on-off valve, V3- third electrically operated on-off valve, V4- fourth electrically operated on-off valve, V5-V18- valves. DETAILED DESCRIPTION

[0066] The present disclosure will be further described below by way of examples, but the present disclosure is not limited to the scope of the examples described.

[0067] The prefix words such as "first", "second" in the embodiments of the present disclosure are merely used to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of ordinal words such as ordinal words in the embodiments of the present disclosure does not constitute a limitation on the described objects, and the description of the described objects should be referred to the description of the context in the claims or embodiments, and should not constitute an unnecessary limitation because of the use of such prefix words. In addition, in the description of the embodiments, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0068] Embodiment 1

[0069] In one specific embodiment of the present disclosure, a water storage energy-based power-driven cooling and heating system is provided, as shown in Figure 1As shown, the power-driven water storage cooling and heating system comprises a plurality of water storage tanks 1, a four-pipe system 2, a control system (not shown in the figure), and a cold water storage centrifugal chiller system 3, a heat storage electric boiler heating system 4, an air-cooled heat pump unit refrigeration and heating system 5, and a water-water heat pump unit refrigeration and heating system 6 connected to the control system; wherein the water storage tank 1 is composed of a water distributor, a temperature sensor and a concrete water tank.

[0070] The cold water storage centrifugal chiller system 3, the heat storage electric boiler heating system 4, the air-cooled heat pump unit refrigeration and heating system 5, and the water-water heat pump unit refrigeration and heating system 6 are respectively connected to the water storage tank 1 and the four-pipe system 2 through pipes to form a cooling storage path and a heating storage path.

[0071] The cold water storage centrifugal chiller system 3 is used for refrigeration under the driving of the first instruction of the control system.

[0072] The heat storage electric boiler heating system 4 is used for heating under the driving of the second instruction of the control system.

[0073] The air-cooled heat pump unit refrigeration and heating system 5 is used for heating under the driving of the third instruction of the control system.

[0074] The water-water heat pump unit refrigeration and heating system 6 is used for refrigeration under the driving of the fourth instruction of the control system, or simultaneous refrigeration and heating under the driving of the fifth instruction of the control system.

[0075] Specifically, the cold water storage centrifugal chiller system 3, the heat storage electric boiler heating system 4, the air-cooled heat pump unit refrigeration and heating system 5, and the water-water heat pump unit refrigeration and heating system 6 are all power-driven and connected to the control system for starting or stopping work under the control of the control system. The cold water storage centrifugal chiller system 3, the heat storage electric boiler heating system 4, the air-cooled heat pump unit refrigeration and heating system 5, and the water-water heat pump unit refrigeration and heating system 6 are respectively connected to the water storage tank 1 and the four-pipe system 2 through pipes, and at night during the low valley power price, energy is stored by using the water storage tank 1, and when there is energy demand on the user side, cooling and heating are provided to the user side through the four-pipe system 2. Of course, pipe valves are provided on the connected pipes, and the control system is also used to control the opening or closing of the corresponding pipe valves to realize the adjustment of the cooling and heating of the building group throughout the year.

[0076] Among them, the centrifugal chiller unit refrigeration system 3 is used for full-load cold storage during off-peak hours at night and direct cooling during the day, realizing cold storage during off-peak electricity price periods and cooling during the day; the electric thermal storage boiler heating system 4 is used for thermal storage during off-peak electricity price periods in winter and for high-temperature thermal storage under extreme weather conditions to improve the heat quality and thermal storage density; the air-cooled heat pump unit refrigeration and heating system 5 is used for thermal storage during off-peak electricity price periods at night and heating during the day; the water-to-water heat pump unit refrigeration and heating system 6 is used to simultaneously provide cooling and heating to the energy supply area during the day and simultaneously store cold and heat in the water storage tank 1 at night during the transition season or winter.

[0077] This specific implementation replaces the gas-fired primary energy system with an electrically driven thermal storage boiler. The thermal storage boiler operates during off-peak electricity prices at night, converting off-peak electricity into heat for storage, thus playing a role in peak shaving and valley filling. Furthermore, the thermal storage boiler can provide high-grade heat to produce high-temperature hot water, increasing the water storage energy density to effectively meet the heat load demands of building complexes during cold weather and solving the problem of insufficient output of air-cooled heat pump units for cooling and heating systems in cold weather. In this electrically driven water storage cooling and heating system, all cold and heat source equipment are fully electrically driven, making full use of the peak-valley electricity price difference throughout the year, minimizing system operating costs, and improving the economic efficiency of the regional energy supply system. Moreover, this electrically driven water storage cooling and heating system has the ability to store cold in summer, heat in winter, and simultaneously store both, improving the utilization rate of the water storage system.

[0078] In one specific implementation, such as Figure 1 As shown, the four-pipeline system 2 includes a cooling water collector 201, a cooling water distributor 202, a heating water collector 203, a heating water distributor 204, a cooling user-side differential pressure sensor 205, a heating user-side differential pressure sensor 206, a cooling balance pipe target flow switch 207, a heating balance pipe bypass electric regulating valve 208, a heating balance pipe target flow switch 209, a cooling balance pipe flow meter 210, a heating balance pipe flow meter 211, a heating secondary pump 212, a cooling secondary pump 213, a cooling energy meter 214, a heating energy meter 215, and the connecting pipes and corresponding pipe valves and instruments.

[0079] The cooling water collector 201 is used to transport high-temperature chilled water from the user side and the upper layer of the water storage tank 1 to the cooling system 3 of the cold storage centrifugal chiller and the cooling and heating system 6 of the water-to-water heat pump unit when the corresponding pipe valves are opened; the cooling water distributor 202 is used to transfer low-temperature chilled water from the cooling system 3 of the cold storage centrifugal chiller and the cooling and heating system 6 of the water-to-water heat pump unit to the user side and the lower layer of the water storage tank 1 when the corresponding pipe valves are opened; the heating water collector 203 is used to transport low-temperature hot water from the user side and the lower layer of the water storage tank 1 to the heating system 4 of the thermal storage electric boiler, the cooling and heating system 5 of the air-cooled heat pump unit, and the cooling and heating system 6 of the water-to-water heat pump unit when the corresponding pipe valves are opened; and the heating water distributor 204 is used to transfer high-temperature hot water from the cooling system 5 of the air-cooled heat pump unit, the cooling and heating system 6 of the water-to-water heat pump unit, and the heating system 4 of the thermal storage electric boiler to the user side and the lower layer of the water storage tank 1 when the corresponding pipe valves are opened.

[0080] In one specific implementation, such as Figures 2-3 As shown, the water-to-water heat pump unit cooling and heating system 6 includes a water-to-water heat pump unit 61, a first cooling tower 62, a water-to-water heat pump chilled water pump 63, and a water-to-water heat pump cooling pump 64. The water-to-water heat pump unit 61 includes a first upper structure 611 and a first lower structure 612. The first upper structure 611 is equipped with a condenser 6111, and the first lower structure 612 is equipped with an evaporator 6121. A first electric switch valve V1 is installed on the pipes of the first upper structure 611 and the first cooling tower 62, and a second electric switch valve V2 is installed on the pipes of the first cooling tower 62 and the water-to-water heat pump cooling pump 64. A third electric switch valve V3 is installed on the pipes of the heating water collector 203 and the water-to-water heat pump cooling pump 64, and a fourth electric switch valve V4 is installed on the pipes of the heating water distributor 204 and the first upper structure 611.

[0081] When the water-to-water heat pump unit's cooling and heating system 6 needs to be adjusted to "cooling mode," the control system will issue a control command to drive the first electric switch valve V1 and the second electric switch valve V2 to open, and the third electric switch valve V3 and the fourth electric switch valve V4 to close. The first cooling tower 62 and the condenser 6111 in the first upper structure 611 will start working to form a cooling circuit of the first upper structure 611, the first cooling tower 62, the water-to-water heat pump cooling pump 64, and the first upper structure 611, which will exchange heat with the lower structure. At the same time, the valves V13 and V14 on the cooling water collector 201 and the cooling water distributor 202 will be driven to open, and the evaporator 6121 in the lower structure of the water-to-water heat pump unit 61 will start working to form a cooling passage of the cooling water collector 201, the water-to-water heat pump chilled water pump 63, the first lower structure 612, the cooling water distributor 202, and the cooling secondary pump 213. High-temperature chilled water enters the evaporator 6121 in the first lower structure 612 from the cooling water collector 201 via the water-to-water heat pump chilled water pump 63. The evaporator 6121 absorbs heat from the high-temperature chilled water to lower its temperature and form low-temperature chilled water. The low-temperature chilled water then enters the cooling water distributor 202 to complete the primary cooling cycle. The water-to-water heat pump chilled water pump 63 is used to control the temperature of the high-temperature chilled water delivered to the first lower structure 612.

[0082] When the water-to-water heat pump unit's cooling and heating system 6 needs to be adjusted to "simultaneous cooling and heating mode," the cooling cycle is consistent with the "cooling mode." Simultaneously, the control system issues control commands to close the first electric switch valve V1 and the second electric switch valve V2, and open the third electric switch valve V3, the fourth electric switch valve V4, and valves V16 and V17 on the heating water collector 203 and the heating water distributor 204. This also activates the condenser 6111 in the first cooling tower 62 and the first upper structure 611 of the water-to-water heat pump unit 61. The system operates to form a heating path consisting of a heating water collector 203, a water-to-water heat pump cooling pump 64, a first upper structure 611, a heating water distributor 204, and a secondary heating pump 212. Low-temperature hot water enters the condenser 6111 in the first upper structure 611 of the water-to-water heat pump unit 61 from the heating water collector 203 via the water-to-water heat pump cooling pump 64. The condenser 6111 heats the low-temperature hot water to raise its temperature, forming high-temperature hot water. This high-temperature hot water then enters the heating water distributor 204, thus completing a simultaneous cooling and heating cycle. The water-to-water heat pump cooling pump 64 is used to control the temperature of the low-temperature hot water delivered to the first upper structure 611.

[0083] In one specific implementation, such as Figures 2-3 As shown, the water storage tank 1 includes a first water storage tank 11 and a second water storage tank 12;

[0084] The first water storage tank 11, the cold water collector 201, the water-water heat pump chilled water pump 63, the first lower structure 612, the cold water distributor 202, and the first water storage tank 11 form a cold storage circulating path.

[0085] The second water storage tank 12, the heat water collector 203, the water-water heat pump cooling water pump 64, the first upper structure 611, the heat water distributor 204, and the second water storage tank 12 form a heat storage circulating path.

[0086] When it is necessary to adjust the water-water heat pump unit refrigeration and heating system 6 to the "simultaneous cold and heat storage mode" in the transition season or at night in winter, the control system also sends a control instruction to drive the valve V9 and V10 on the connecting pipeline between the water-water heat pump unit refrigeration and heating system 6 and the first water storage tank 11 and the second water storage tank 12 to open, and the valves V11, V12, V13, and V14 to close. High-temperature chilled water enters the cold water collector 201 from the upper layer of the first water storage tank 11 through the pipeline, enters the evaporator 6121 in the first lower structure 612 through the water-water heat pump chilled water pump 63, and is cooled to low-temperature chilled water through the evaporator 6121. The low-temperature chilled water flows into the lower layer of the first water storage tank 11 through the cold water distributor 202, and the cold storage cycle is completed. Low-temperature hot water enters the heat water collector 203 from the lower layer of the second water storage tank 12 through the pipeline, enters the condenser 6111 in the first upper structure 611 through the water-water heat pump cooling water pump 64, and is heated to high-temperature hot water. The high-temperature hot water flows into the upper layer of the second water storage tank 12 through the heat water distributor 204, and the heat storage cycle is completed. The water-water heat pump unit refrigeration and heating system 6 completes the simultaneous cold and heat storage. At this time, the valves V5, V7, V16, and V17 on the pipeline are opened, and the valves V6, V8, V15, and V18 are closed.

[0087] In a specific embodiment, as shown in FIG. 3, the cold storage centrifugal water chiller unit refrigeration system 3 includes a cold storage centrifugal water chiller unit 31, a cold storage unit chilled water pump 32, a cold storage unit cooling water pump 33, and a second cooling tower 34. Figure 3

[0088] The cold storage centrifugal water chiller unit 31 includes a second upper structure 311 and a second lower structure 312.

[0089] The second upper structure 311, the second cooling tower 34, the cold storage unit cooling water pump 33, and the second upper structure 311 form a cooling circuit through the pipeline, and the cooling circuit is used to cool the second lower structure 312.

[0090] The cold water collector 201, the cold storage unit chilled water pump 32, the second lower structure 312, the cold water distributor 202, and the cold water secondary pump 213 form a cold water path.

[0091] ​The water storage tank 1, the cooling water collector 201, the chilled water pump 32 of the cold storage unit, the second lower structure 312, the cooling water distributor 202, and the water storage tank 1 form a cold storage circulation path.

[0092] The chilled water pump 32 of the cold storage unit is used to control the water temperature of the high-temperature chilled water delivered into the second lower structure 312, and the low-temperature chilled water is output after being cooled by the second upper structure 311.

[0093] Specifically, when the cold storage centrifugal water chiller system 3 needs to be adjusted to the "cooling mode", the control system sends a control instruction to control the related valves on the pipeline to open, so that the high-temperature chilled water enters the cooling water collector 201 from the user side return water, and then enters the second lower structure 312 from the cooling water collector 201 through the chilled water pump 32 of the cold storage unit. After being cooled by the evaporator in the second lower structure 312, the water temperature is reduced, and the low-temperature chilled water flows out of the second lower structure 312 into the cooling water distributor 202, and is delivered to the user by the cooling secondary pump 213 in the four-pipe system 2, completing the cooling cycle.

[0094] When the cold storage centrifugal water chiller system 3 needs to be adjusted to the "cold storage mode", the control system sends a control instruction to control the related valves on the pipeline to open, so that the high-temperature chilled water enters the cooling water collector 201 from the upper layer of the water storage tank 1, and then enters the second lower structure 312 from the cooling water collector 201 through the chilled water pump 32 of the cold storage unit. After being cooled by the evaporator in the second lower structure 312, the water temperature is reduced, and the low-temperature chilled water flows out of the second lower structure 312 into the cooling water distributor 202, and then flows into the lower layer of the water storage tank 1 from the cooling water distributor 202, completing the cold storage cycle. At this time, the valves V5, V7, V16, and V17 on the pipeline are closed, and the valves V6, V8, V15, and V18 are opened.

[0095] In one specific embodiment, as shown in FIG. 4, the heat storage electric boiler heating system 4 includes a heat storage electric boiler 41 and a hot water circulating pump 42. Figure 3

[0096] The water storage tank 1, the cooling water collector 201, the chilled water pump 32 of the cold storage unit, the second lower structure 312, the cooling water distributor 202, and the water storage tank 1 form a cold storage circulation path.

[0097] The chilled water pump 32 of the cold storage unit is used to control the water temperature of the high-temperature chilled water delivered into the second lower structure 312, and the low-temperature chilled water is output after being cooled by the second upper structure 311.

[0098] ​Specifically, when the heat storage type electric boiler heating system 4 needs to be heat stored, the low-temperature hot water enters the heating water collector 203 from the lower layer of the water storage tank 1, enters the heat storage type electric boiler 41 through the hot water circulating pump 42, and after being heated by the heat storage type electric boiler 41, the high-temperature hot water formed enters the heating water distributor 204, enters the upper layer of the water storage tank 1 through the heating distributor, and completes the heat storage cycle. At this time, the valves V5, V7, V16, and V17 on the pipeline are opened, and the valves V6, V8, V15, and V18 are closed.

[0099] In a specific embodiment, as shown in Figures 3-4 The air-cooled heat pump unit refrigeration and heating system 5 includes a screw air-cooled heat pump unit 51, a water-water plate heat exchanger 52, a heat pump heat exchanger secondary side circulating pump 53, and a heat pump heat exchanger primary side circulating pump 54.

[0100] The heating water collector 203, the heat pump heat exchanger secondary side circulating pump 53, the water-water plate heat exchanger 52, the heating water distributor 204, and the heating secondary pump 212 form a heating path.

[0101] The water storage tank 1, the heating water collector 203, the heat pump heat exchanger secondary side circulating pump 53, the water-water plate heat exchanger 52, the heating water distributor 204, and the water storage tank 1 form a heat storage cycle path.

[0102] The screw air-cooled heat pump unit 51, the water-water plate heat exchanger 52, and the heat pump heat exchanger primary side circulating pump 54 form a heating path through the pipeline, and the heating path is used for heating the primary side circulating water.

[0103] The heat pump heat exchanger secondary side circulating pump 53 is used for controlling the water temperature of the low-temperature hot water delivered to the water-water plate heat exchanger 52, and the water-water plate heat exchanger 52 exchanges heat with the low-temperature hot water under the action of the primary side circulating water, and outputs high-temperature hot water.

[0104] Specifically, when the air-cooled heat pump unit refrigeration and heating system 5 needs to be adjusted to the "heat storage mode", the control system will issue a control instruction to control the related valves on the pipeline to be opened, so that the low-temperature hot water enters the heating water collector 203 from the lower layer of the water storage tank 1, enters the water-water plate heat exchanger 52 through the heat pump heat exchanger secondary side circulating pump 53, and the temperature of the low-temperature hot water is increased after being exchanged by the water-water plate heat exchanger 52 to form high-temperature hot water. The high-temperature hot water enters the heating water distributor 204, enters the upper layer of the water storage tank 1 through the heating distributor, and the air-cooled heat pump unit refrigeration and heating system 5 completes the heat storage cycle. Among them, the primary side circulating water enters the screw air-cooled heat pump unit 51 from the water-water plate heat exchanger 52 through the heat pump heat exchanger primary side circulating pump 54, and the primary side circulating water flows into the water-water plate heat exchanger 52 after being heated, and completes heat exchange with the secondary side. At this time, the valves V5, V7, V16, and V17 on the pipeline are opened, and the valves V6, V8, V15, and V18 are closed.

[0105] When it is necessary to adjust the air-cooled heat pump unit refrigeration and heating system 5 to "heating mode", the control system will issue control instructions to control the opening of the related valves on the pipeline, so that the user side low temperature hot water returns to the heating water collector 203, the low temperature hot water enters the water-water plate heat exchanger 52 through the heat pump heat exchanger secondary side circulating pump 53, the temperature of the hot water is raised after heat exchange to form high temperature hot water, the high temperature hot water enters the heating water distributor 204, and is transported to the user through the heating secondary pump 212, and the air-cooled heat pump unit refrigeration and heating system 5 completes the heating. The primary side circulating water is consistent with the "heat storage mode".

[0106] It should be noted that the power-driven water storage cooling and heating system can be provided with one or more sets of equipment in the cold storage centrifugal chiller refrigeration system 3, the heat storage electric boiler heating system 4, the air-cooled heat pump unit refrigeration and heating system 5, and the water-water heat pump unit refrigeration and heating system 6 according to actual energy demand, which is not limited in the embodiment.

[0107] The following describes the operation conditions of the whole year cooling and heating according to the building load demand:

[0108] (1) Summer night low valley electricity price period cold storage condition

[0109] Under this condition, the cold storage centrifugal chiller refrigeration system 3 first starts the cold storage unit cooling water pump 33, then starts the second cooling tower 34, opens the electric valve on the cooling circuit pipeline corresponding to the cold storage centrifugal chiller refrigeration system 3, starts the cold storage unit chilled water pump 32, opens the valves V6, V8, V11, V12, V15, V18, closes the valves V5, V7, V9, V10, V16, V17, and starts the cold storage centrifugal chiller 31. High temperature chilled water (for example, 13℃) enters the cold storage unit chilled water pump 32 from the upper layer of the water storage tank 1, is transported to the second lower layer structure 312 of the cold storage centrifugal chiller 31 by the cold storage unit chilled water pump 32, and the temperature of the high temperature chilled water is reduced by the evaporator to form low temperature chilled water (for example, 5℃) of the set temperature. The specific set temperature can be set according to actual needs. The low temperature chilled water enters the cooling water distributor 202, and then enters the lower layer of the water storage tank 1 from the cooling water distributor 202. When the temperature monitoring in the water storage tank 1 reaches the set temperature (5℃), the cold storage is stopped, and the night cold storage condition is completed.

[0110] (2) Summer daytime energy station cooling condition

[0111] In this condition, the secondary cooling pump 213 is adjusted according to the load demand of the energy supply area, and the primary side system sequentially starts the water-water heat pump unit 6 and the cold water storage centrifugal chiller 3 according to the total load, and adjusts the cold release of the water tank 1 according to the distribution of the peak and sharp peak power consumption period in the daytime to meet the cooling load demand in the energy supply area and complete the daytime cooling operation.

[0112] (3) Transition season or winter with heat load demand and simultaneous cold and heat storage condition

[0113] In this condition, the water-water heat pump cooling pump 64 and the water-water heat pump chilled water pump 63 are first started, and then the valves V5, V7, V9, V10, V16, and V17 are opened, the valves V6, V8, V11, V12, V13, V14, V15, and V18 are closed, the third electrically operated on-off valve V3 and the fourth electrically operated on-off valve V4 are opened, the first electrically operated on-off valve V1 and the second electrically operated on-off valve V2 are closed, low-temperature hot water (for example, 41℃) flows from the lower layer of the second water tank 12 through the valves V7 and V16 into the heat supply header tank 203, and then flows from the heat supply header tank 203 through the water-water heat pump cooling pump 64 into the first upper layer structure 611 of the water-water heat pump unit 61, and after being heated by the condenser 6111, high-temperature hot water (for example, 48℃) is formed, and the specific setting temperature can be set according to actual needs, and the high-temperature hot water flows through the heat supply distributor 204, the valves V17 and V5, and then enters the upper layer of the second water tank 12, completing the heat storage cycle; at the same time, high-temperature chilled water (for example, 12℃) flows from the upper layer of the first water tank 11 through the valve V11, enters the first lower layer structure 612 of the water-water heat pump unit 61 through the water-water heat pump chilled water pump 63, and after being heated by the evaporator 6121, low-temperature chilled water (for example, 5℃) is formed, and the low-temperature chilled water enters the lower layer of the first water tank 11 through the valve V10, completing the cold storage cycle. When the low-temperature period ends or the temperature monitoring of the water tank 1 reaches the set temperature, the simultaneous cold and heat storage condition is ended.

[0114] (4) Transition season or winter with heat load demand and simultaneous cooling and heating condition

[0115] In this condition, according to the user load demand, first open the first water tank 11 to release cold and heat, at this time, the refrigeration host and the heating host are in the state of shutdown. When cooling, the low-temperature chilled water flows out from the lower layer of the first water tank 11, enters the cooling water distributor 202 through the valves V10 and V14, and is then transported to the user side by the cooling secondary pump 213. The high-temperature chilled water after heat exchange at the user side returns to the first water tank 11 through the cooling water collector 201 and the valves V13 and V9, and the cooling of the first water tank 11 is completed. At the same time, when heating, the high-temperature hot water flows out from the upper layer of the second water tank 12, enters the heating water distributor 204 through the valves V5 and V17, and is then transported to the heating pipe network to the user side by the heating secondary pump 212. The low-temperature hot water after heat exchange at the user side returns to the second water tank 12 through the heating water collector 203 and the valves V16 and V7, and the heating of the water tank is completed.

[0116] When the daytime cooling / heating load is greater than the cold / heat storage load, the water-water heat pump unit is started to operate the auxiliary refrigeration and heating system 6 to maximize the operation efficiency of the water storage cooling and heating system based on electric power.

[0117] (5) Winter low-valley electricity price heat storage condition

[0118] In this condition, the heating load demand in winter is much greater than the cooling load demand in the energy supply area. The low-temperature hot water (for example, 41℃, which can be set according to the working condition) in the lower layer of the water tank 1 enters the heating water collector 203 through the valves V7 and V16, and then enters the heat storage electric boiler 41 and the water-water plate heat exchanger 52 through the hot water circulating pump 42 and the heat pump heat exchanger secondary side circulating pump 53. The low-temperature hot water is heated to high-temperature hot water (for example, 48℃) by the heat storage electric boiler 41 and the water-water plate heat exchanger 52, and then enters the heating water distributor 204. The high-temperature hot water enters the upper layer of the water tank 1 through the valves V17 and V5, and the heat storage cycle is completed. The low-temperature hot water at the outlet of the primary side circulating water of the water-water plate heat exchanger 52 enters the screw air-cooled heat pump unit 51 through the heat pump heat exchanger primary side circulating pump 54. The low-temperature hot water is heated by the screw air-cooled heat pump unit 51, enters the primary side circulating water inlet of the water-water plate heat exchanger 52, and exchanges heat with the secondary side, and the heating cycle of the screw air-cooled heat pump unit 51 is completed.

[0119] (6) Winter daytime energy station heating condition

[0120] In this working condition, the operation is adjusted according to the heat load demand of the user side, the number of operating screw air-cooled heat pump units 51 is prioritized and operated according to the heat load size and the heat release operation of the water tank 1 is sequentially operated according to the heat load demand in the peak and sharp peak power period. The adjustment mode is as follows: according to the operation strategy diagram of the whole day, the air-cooled heat pump unit refrigeration and heating system 5 is first started, the low-temperature hot water return is returned to the heat supply header tank 203, the low-temperature hot water return is circulated by the heat pump heat exchanger secondary side circulating pump 53 and the water-water plate heat exchanger one side circulating water, at this time, the water-water plate heat exchanger one side circulating water outlet enters the screw air-cooled heat pump unit 51 through the heat pump heat exchanger one side circulating pump 54, and the heated hot water enters the water-water plate heat exchanger one side circulating water inlet to complete heat exchange, at this time, the water-water plate heat exchanger two side outlet is heated and enters the heat supply header tank 204, and then is transported to the user side by the heat supply secondary pump 212; when the heat load demand of the user side continuously increases, or in the winter peak and sharp peak power period, at this time, the valves V16, V17, V5 and V7 are opened, the valves V6 and V8 are closed, the operating flow of the heat supply secondary pump 212 is greater than that of the heat pump heat exchanger one side circulating pump 54, part of the low-temperature hot water on the user side enters the lower layer of the water tank 1 through the valves V16 and V7, and the high-temperature hot water enters the heat supply header tank 204 from the upper layer of the water tank 1 through the valves V5 and V17, and is transported to the user side by the heat supply secondary pump 212 to complete the water tank heat release cycle, when the temperature monitoring in the water tank 1 reaches the set value, the electric valve in the heat release pipeline is closed to stop heat release.

[0121] In the embodiment, the cold and heat source equipment of the water energy storage cooling and heating system driven by electricity adopts a full-electricity driving mode. Under the background of increasing proportion of green electricity in the power grid year by year, the carbon emission index of the system is reduced year by year, which adapts to the development trend of energy utilization electrification. The water energy storage cooling and heating system driven by electricity also stores cold and heat, combines with a four-pipe pipeline system to simultaneously supply cooling and heating, fully utilizes the difference between peak and valley electricity prices throughout the year, stores cold and heat at night at low electricity prices, maximally reduces system operation cost, greatly improves the economy of the energy supply area system, effectively improves the regional environment, and has the ability of summer cold storage, winter heat storage and simultaneous cold and heat storage, thereby improving the utilization rate of the water energy storage system.

[0122] Embodiment 2

[0123] The present disclosure provides an energy system comprising the water energy storage cooling and heating system driven by electricity according to any one of the above embodiments.

[0124] Specifically, a plurality of water energy storage cooling and heating systems driven by electricity according to any one of the above embodiments can be arranged in the energy system to meet the energy demand.

[0125] The cold and heat source equipment of the water energy storage cooling and heating system based on electric power driving in the embodiment adopts a full electric power driving mode. Under the background of increasing proportion of green electricity in the power grid year by year, the carbon emission index of the system is reduced year by year, adapting to the development trend of energy utilization electrification. The water energy storage cooling and heating system based on electric power driving also carries out water cold storage and heat storage, combines with a four-pipe pipeline system to simultaneously supply cooling and heating, fully utilizes the difference between peak and valley electricity prices throughout the year, carries out simultaneous cold storage and heat storage at night when the electricity price is low, maximally reduces the operation cost of the system, greatly improves the economy of the energy supply area system, effectively improves the regional environment, and has the ability of summer cold storage, winter heat storage and simultaneous cold storage and heat storage, thereby improving the utilization rate of the water energy storage system.

[0126] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, and these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A water storage cooling and heating system based on electric power drive, characterized in that, The power-driven water storage cooling and heating system comprises a plurality of water storage tanks, a four-pipe system, a control system, a cold water storage centrifugal chiller system, a heat storage electric boiler heating system, an air-cooled heat pump unit refrigeration and heating system, and a water-water heat pump unit refrigeration and heating system connected with the control system; The cold water storage centrifugal chiller system, the heat storage electric boiler heating system, the air-cooled heat pump unit refrigeration and heating system, and the water-water heat pump unit refrigeration and heating system are respectively connected with the water storage tanks and the four-pipe system through pipes to form a cooling storage path and a heating storage path; The cold water storage centrifugal chiller system is used for refrigeration under the driving of the first instruction of the control system; The heat storage electric boiler heating system is used for heating under the driving of the second instruction of the control system; The air-cooled heat pump unit refrigeration and heating system is used for heating under the driving of the third instruction of the control system; The water-water heat pump unit refrigeration and heating system is used for refrigeration under the driving of the fourth instruction of the control system, or simultaneous refrigeration and heating under the driving of the fifth instruction of the control system.

2. The electric drive based water storage cooling and heating system of claim 1, wherein, The water-water heat pump unit refrigeration and heating system comprises a water-water heat pump unit and a first cooling tower; The first upper structure is connected with the first cooling tower through pipes to form a cooling loop; The first upper structure is also connected with the water storage tanks and the four-pipe system through pipes to form the heating storage path; The first lower structure is connected with the water storage tanks and the four-pipe system through pipes to form the cooling storage path; The water-water heat pump unit refrigeration and heating system is used for receiving the fourth instruction, opening the cooling loop and the cooling storage path, closing the heating storage path, and driving the first cooling tower and the water-water heat pump unit to refrigerate; The water-water heat pump unit refrigeration and heating system is used for receiving the fifth instruction, closing the cooling loop, opening the cooling storage path and the heating storage path, and driving the water-water heat pump unit to simultaneously refrigerate and heat.

3. The electric drive based water storage cooling and heating system of claim 2, wherein, The four-pipe system comprises a cooling water collector and a cooling water distributor; The cooling water collector is used for delivering high-temperature chilled water on the user side to the cold water storage centrifugal chiller system and / or the water-water heat pump unit refrigeration and heating system; The cooling water distributor is used for delivering low-temperature chilled water of the cold water storage centrifugal chiller system and / or the water-water heat pump unit refrigeration and heating system to the user side; The cooling water collector is also used for delivering high-temperature chilled water on the upper layer of the water storage tanks to the cold water storage centrifugal chiller system and / or the water-water heat pump unit refrigeration and heating system; The cooling water distributor is also used for delivering low-temperature chilled water of the cold water storage centrifugal chiller system and / or the water-water heat pump unit refrigeration and heating system to the lower layer of the water storage tanks; And / or, The four-pipe system comprises a heating water collector and a heating water distributor; The heat supply collector is used for conveying low-temperature hot water on the user side to the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system; The heat supply distributor is used for conveying high-temperature hot water of the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system to the user side; The heat supply collector is also used for conveying low-temperature hot water in the lower layer of the water storage tank to the heat storage electric boiler heating system and / or the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system; The heat supply distributor is also used for conveying high-temperature hot water of the heat storage electric boiler heating system and / or the air-cooled heat pump unit refrigeration and heating system and / or the water-water heat pump unit refrigeration and heating system to the lower layer of the water storage tank.

4. The electric drive based water energy storage cooling and heating system of claim 3, wherein, The water-water heat pump unit refrigeration and heating system further comprises a water-water heat pump chilled water pump and a water-water heat pump cooling pump, and the four-pipe pipeline system further comprises a cooling secondary pump; The first upper layer structure is provided with a condenser, and the first lower layer structure is provided with an evaporator; The cooling collector, the water-water heat pump chilled water pump, the first lower layer structure, the cooling distributor and the cooling secondary pump form a cooling channel; The first upper layer structure, the first cooling tower, the water-water heat pump cooling pump and the first upper layer structure form the cooling loop through pipelines; The water-water heat pump chilled water pump is used for controlling the water temperature of high-temperature chilled water conveyed to the first lower layer structure, and the high-temperature chilled water outputs low-temperature chilled water after being cooled by the evaporator.

5. The electric drive based water energy storage cooling and heating system of claim 4, wherein, The water storage tank comprises a first water storage tank and a second water storage tank, and the four-pipe pipeline system further comprises a heat supply secondary pump; The heat supply collector, the water-water heat pump cooling pump, the first upper layer structure, the heat supply distributor and the heat supply secondary pump form a heat supply channel; The first water storage tank, the cooling collector, the water-water heat pump chilled water pump, the first lower layer structure, the cooling distributor and the first water storage tank form a cold storage circulation channel; The second water storage tank, the heat supply collector, the water-water heat pump cooling pump, the first upper layer structure, the heat supply distributor and the second water storage tank form a heat storage circulation channel; The water-water heat pump cooling pump is used for controlling the water temperature of low-temperature hot water conveyed to the first upper layer structure, and the low-temperature hot water outputs high-temperature hot water after being heated by the condenser.

6. The electric drive based water energy storage cooling and heating system of claim 5, wherein, First electrically-operated on-off valves are arranged on pipelines of the first upper layer structure and the first cooling tower, and second electrically-operated on-off valves are arranged on pipelines of the first cooling tower and the water-water heat pump cooling pump; Third electrically-operated on-off valves are arranged on pipelines of the heat supply collector and the water-water heat pump cooling pump, and fourth electrically-operated on-off valves are arranged on pipelines of the heat supply distributor and the first upper layer structure; The water-water heat pump unit refrigeration and heating system is used for receiving the fourth instruction, driving the first electrically-operated on-off valves and the second electrically-operated on-off valves to open, and driving the third electrically-operated on-off valves and the fourth electrically-operated on-off valves to close. The water-water heat pump unit refrigeration and heating system is configured to receive the fifth instruction, drive the first and second electrically-operated on-off valves to close, and drive the third and fourth electrically-operated on-off valves to open.

7. The electric drive based water energy storage cooling and heating system of claim 3, wherein, The cold water storage centrifugal chiller refrigeration system comprises a cold water storage centrifugal chiller, a cold water storage chiller refrigeration pump, a cold water storage chiller cooling water pump, and a second cooling tower. The cold water storage centrifugal chiller comprises a second upper structure and a second lower structure. The second upper structure, the second cooling tower, the cold water storage chiller cooling water pump, and the second upper structure form a cooling loop through pipes, which is configured to cool the second lower structure. The cold water supply collector, the cold water storage chiller refrigeration pump, the second lower structure, the cold water supply distributor, and the cold water supply secondary pump form a cold water supply path. The water storage tank, the cold water supply collector, the cold water storage chiller refrigeration pump, the second lower structure, the cold water supply distributor, and the water storage tank form a cold water storage circulation path. The cold water storage chiller refrigeration pump is configured to control the temperature of high-temperature chilled water delivered to the second lower structure, which is cooled by the second upper structure and then outputs low-temperature chilled water.

8. The electric drive based water energy storage cooling and heating system of claim 3, wherein, The heat storage electric boiler heating system comprises a heat storage electric boiler and a hot water circulation pump, and the four-pipe system further comprises a heating secondary pump. The water storage tank, the heating water supply collector, the hot water circulation pump, the heat storage electric boiler, the heating water supply distributor, and the water storage tank form a heat storage circulation path. The hot water circulation pump is configured to control the temperature of low-temperature hot water delivered to the heat storage electric boiler, which is heated by the heat storage electric boiler and then outputs high-temperature hot water. And / or, The air-cooled heat pump unit refrigeration and heating system comprises a screw air-cooled heat pump unit, a water-water plate heat exchanger, a heat pump heat exchanger secondary side circulation pump, and a heat pump heat exchanger primary side circulation pump. The heating water supply collector, the heat pump heat exchanger secondary side circulation pump, the water-water plate heat exchanger, the heating water supply distributor, and the heating secondary pump form a heating path. The water storage tank, the heating water supply collector, the heat pump heat exchanger secondary side circulation pump, the water-water plate heat exchanger, the heating water supply distributor, and the water storage tank form a heat storage circulation path. The screw air-cooled heat pump unit, the water-water plate heat exchanger, and the heat pump heat exchanger primary side circulation pump form a heating path through pipes, which is configured to heat the primary side circulation water. The heat pump heat exchanger secondary side circulation pump is configured to control the temperature of low-temperature hot water delivered to the water-water plate heat exchanger, which is heated by the primary side circulation water and then outputs high-temperature hot water.

9. The electric drive based water energy storage cooling and heating system of any one of claims 3 to 8, wherein, The four-pipe system further comprises a cold user side differential pressure sensor, a heating user side differential pressure sensor, a cold balance pipe target flow switch, a heating balance pipe bypass electrically-operated regulating valve, a heating balance pipe target flow switch, a cold balance pipe flow meter, a heating balance pipe flow meter, a cold energy meter, and a heating energy meter.

10. An energy system, characterized by The energy system comprises the electricity-driven water storage cooling and heating system according to any one of claims 1 to 9.

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