CN217584696U - Water pumping cold and heat storage power station - Google Patents

Abstract

The utility model discloses draw water cold-storage heat accumulation power station includes hydroelectric set, goes up reservoir, lower reservoir, heat pump set, characterized by, hydroelectric set adopt reversible pump turbine, and reservoir and air conditioner user are connected to heat pump set's evaporimeter inlet tube, outlet pipe. When water pumping and energy storage are carried out at night, the hydroelectric generating set pumps water in the lower reservoir to the upper reservoir, and simultaneously starts the heat pump unit, the evaporator freezes and cools the water in the upper reservoir in summer, and the evaporator is converted into a condenser in winter to heat the water in the upper reservoir; in daytime, the upper reservoir firstly provides air-conditioning chilled water or hot water for air-conditioning users, and when the temperature of the air-conditioning water cannot meet the air-conditioning requirement, the water in the upper reservoir is released to the lower reservoir to drive the hydroelectric generating set to generate electricity. Therefore, the invention fully utilizes the huge water storage space of the upper reservoir, realizes pumped storage power generation, provides cheap air-conditioning water, has obvious economic benefit, and is suitable for mountain cities capable of building the upper reservoir.

Description

Water pumping cold and heat storage power station

Technical Field

The utility model belongs to hydroelectric generation, air conditioner refrigeration field, concretely relates to cold-storage heat accumulation power station draws water.

Background

The existing pumped storage power station utilizes the cheap electricity price at night when using bottom valley, pumps the water of a lower reservoir to an upper reservoir for storage, releases the water of the upper reservoir to the lower reservoir when using peak in daytime, drives a hydroelectric generating set to generate electricity, and plays a role in eliminating peak and filling valley in the operation of a power grid. The existing ice cold accumulation and water cold accumulation for air conditioning refrigeration occupy building space, and have the disadvantages of complex system, huge investment and very limited stored energy.

Disclosure of Invention

The utility model aims at utilizing the upper reservoir of the pumped storage power station to store the air conditioner chilled water and the hot water, not only can pump for storage and power generation, but also can store cold and heat.

The utility model discloses a solution is: the water pumping cold and heat accumulating power station includes hydroelectric generator set, upper reservoir, lower reservoir, water leading pipe, tail water pipe and heat pump set, and features that the hydroelectric generator set adopts reversible water pump turbine, the water leading pipe has water inlet connected to the upper reservoir and water gate in the interface, the water leading pipe has water outlet connected to the water inlet of the hydroelectric generator set, the tail water pipe has water inlet connected to the water outlet of the hydroelectric generator set, the tail water pipe has water outlet connected to the lower reservoir, the water inlet pipe and water outlet pipe of the evaporator of the heat pump set are connected to the upper reservoir and the air conditioner user, and the water inlet pipe and water outlet pipe of the condenser of the heat pump set are connected to the lower reservoir. When water pumping and energy storage are carried out at night, a water gate is opened, a reversible water pump turbine is started, water in a lower reservoir is pumped to an upper reservoir, a heat pump unit is started at the same time, water in the upper reservoir in summer is stored in the upper reservoir after being frozen and cooled by an evaporator of the heat pump unit, the evaporator of the heat pump unit in winter is converted into a condenser, water in the upper reservoir is stored in the upper reservoir after being heated by the evaporator of the heat pump unit, after the upper reservoir is fully stored, the water gate is closed, the reversible water pump turbine stops pumping water, and the water in the upper reservoir is processed to a set temperature by the heat pump unit; in daytime, the upper reservoir firstly provides air conditioner chilled water or hot water for air conditioner users, when the water temperature cannot meet the air conditioner requirement after the air conditioner water is continuously recycled, the water gate is opened, the water in the upper reservoir is released to the lower reservoir to drive the reversible water pump turbine to generate electricity, and meanwhile, the water in the lower reservoir can be used as cooling water of a condenser of the heat pump unit in summer and can be used as a heat absorption heat source of the condenser of the heat pump unit in winter. In order to reduce heat loss, the wall and the bottom of the upper reservoir are insulated, the support is used for overhead insulation on the water surface, the insulation board is laid on the support, or the insulation board floats on the water surface, and moves along with the floating of the water surface.

Through rough calculation, supposing that the night water storage temperature in summer of the upper reservoir is 7 ℃, the temperature is raised to 12 ℃ by using an air conditioner in the daytime, the design cold load of the air conditioner of a summer building is 90 watts per square meter, the upper reservoir has 1000 ten thousand cubic storage capacity, and the air conditioner can provide 4 hours of air conditioner chilled water for a building with 1.5 hundred million square meters, which is equivalent to the air conditioner load of a 1000 million population city. Therefore, the solution makes full use of the huge water storage space of the upper reservoir, realizes pumped storage power generation, utilizes cheap electric power, provides cheap air conditioning water, saves huge building space for users, reduces carbon emission, and has remarkable economic benefit. The technology is suitable for mountain cities where upper reservoirs can be built or cities with water fall and large water storage tanks.

Drawings

FIG. 1 is a schematic view of a pumped-water cold-storage heat-storage power station system 1

FIG. 2 is a schematic diagram of a pumped-water cold-storage heat-storage power station system structure 2

FIG. 3 is a schematic view of a pumped-water cold-storage heat-storage power station system structure 3

FIG. 4 is a schematic diagram of a pumped-water cold-storage heat-storage power station system structure 4

FIG. 5 is a schematic view of air conditioning water circulation of upper reservoir 1

FIG. 6 is a schematic view of air conditioning water circulation of upper reservoir 2

FIG. 7 is a schematic view of air conditioning water circulation of upper reservoir 3

Description of reference numerals:

1. the system comprises a hydroelectric generating set, 2, an upper reservoir, 3, a lower reservoir, 4, a water conduit, 5, a tail water pipe, 6, a sluice, 7, a heat insulation layer, 8, a compressor, 9, an evaporator, 10, a condenser, 11, an expansion restrictor, 12, a four-way reversing valve, 13, an air-cooled condenser, 14, a cooling tower, 15, 16, an electromagnetic valve, 17, an air-conditioning water circulating pump, 18, a cooling water circulating pump, 19, 20, 21, 22, 23, 24, 25, 27, 28, 31, 32, 33, 35, 36, 37, 38, 39, 40, a valve, 29, an air-conditioning water supply pipe, 30, an air-conditioning water return pipe, 34, an air-conditioning water heat exchange coil, 41, an air-conditioning cooling water return pipe, 42, an air-conditioning cooling water supply pipe, 43, a dam, 44, a water suction port, 45, a water outlet, 46 and a partition wall.

Detailed Description

In fig. 1, a reversible pump turbine is adopted as a hydroelectric generating set 1, a water inlet of a water conduit 4 is connected with a reservoir 2, a water gate 6 is arranged at a joint, a water outlet of the water conduit 4 is connected with a water inlet of the hydroelectric generating set 1, a water inlet of a draft tube 5 is connected with a water outlet of the hydroelectric generating set 1, a water outlet of the draft tube 5 is connected with the reservoir 3, an evaporator 9 water inlet pipe and a water outlet pipe of a heat pump unit are connected with the reservoir 2 and an air conditioner user, a water inlet pipe and a water outlet pipe of a condenser 10 of the heat pump unit are connected with the reservoir 3, the condenser 10 is a water-cooled condenser, the heat pump unit is a master station type heat pump unit, one or more heat pump units are arranged at an energy master station, and air conditioner cold and hot water is provided for the whole city or a building group.

And starting pumping water for energy storage at night when electricity is used in a valley, opening the water gate 6, starting the hydroelectric generating set 1, pumping water in the lower reservoir 3 into the upper reservoir 2, starting the heat pump set, opening the valves 19, 22, 24 and 26, closing the valves 20, 21, 23, 25, 27 and 28, and starting the air-conditioning water circulating pump 17 and the cooling water circulating pump 18. In summer, water in the upper reservoir 2 enters the evaporator 9 through the valve 26 for freezing and temperature reduction, then is sent into the upper reservoir 2 through the air-conditioning water circulating pump 17 and the valve 24, water in the lower reservoir 3 is continuously pumped to the upper reservoir 2 by the hydroelectric generating set 1 and is continuously frozen and temperature reduced by the evaporator 9 until the upper reservoir 2 is fully stored, the water gate 6 is closed, water pumping and energy storage at night are finished, and when the water temperature is preferably reduced to below 7 ℃ by the evaporator 9, the operation of the heat pump unit is stopped. Meanwhile, the cooling tower 14 is also in operation, cooling water continuously circulates through the condenser 10, the cooling water circulating pump 18, the valve 19, the cooling tower 14 and the valve 22, and condensation heat of the heat pump unit is discharged to the air through the cooling tower 14. If the cooling tower 14 is not arranged, the heat pump unit is provided with the air-cooled condenser 13, the condensation heat of the heat pump unit can be discharged into the air by the air-cooled condenser 13, the air-cooled condenser 13 and the condenser 10 are connected in parallel in the figure, the start and stop of the air-cooled condenser 13 and the condenser 10 are controlled by electromagnetic valves 15 and 16, and the air-cooled condenser and the condenser can also be connected in series. In winter, the four-way reversing valve 12 is reversed, the working condition of the heat pump unit is changed, the evaporator 9 is converted into a condenser to prepare air-conditioning hot water, the air-conditioning hot water is sent into the upper reservoir 2 through the air-conditioning water circulating pump 17, the air-cooled condenser 13 is converted into an evaporator to absorb heat from air, the condenser 10 can also be operated, and the heat is absorbed from the air through the cooling tower 14, so that the water in the lower reservoir 3 is continuously pumped into the upper reservoir 2 by the hydroelectric generator unit 1 and is continuously heated by the evaporator 9 until the upper reservoir 2 is fully stored, the water gate 6 is closed, the water pumping and energy storage are finished at night, and the heat pump unit stops operating when the water temperature is suitable to be heated to more than 50 ℃ by the evaporator 9.

The cold and hot water of the urban air conditioner firstly uses the cold and hot water stored in the upper reservoir 2, and a heat pump unit of an energy main station is not started or is partially started. At this time, the valves 23, 25, 26 and 27 are opened, the valves 24 and 28 are closed, cold and hot water stored in the upper reservoir 2 enters the air-conditioning water supply pipe 29 through the valves 26 and 27, the air-conditioning water circulating pump 17 and the valve 25 and is sent to each air-conditioning user in a city, then air-conditioning return water is collected to the air-conditioning water return pipe 30 and returns to the upper reservoir 2 through the valve 23, and the circulation is continued until the temperature of the water in the upper reservoir 2 in summer reaches above 15 ℃ and the temperature of the water in winter is reduced to below 35 ℃ and cannot meet the air-conditioning requirements, at this stage, if the temperature of the water in the upper reservoir 2 cannot meet the air-conditioning requirements, part of the heat pump units can be started, and part of the water in the upper reservoir 2 enters the evaporator 9 and is sent into the air-conditioning water supply pipe 29 through the air-conditioning water circulating pump 17 after being cooled or heated again. And the next step is to enter the operation working condition of the hydroelectric power generation and heat pump unit, the water gate 6 is opened, the water in the upper reservoir 2 is released to the lower reservoir 3 to drive the hydroelectric power generation unit 1 to generate power, the valves 20, 21, 25 and 28 are opened, the valves 19, 22, 23, 24, 26 and 27 are closed, the evaporator 9 produces cold and hot water, the cold and hot water is provided for urban air-conditioning users through the air-conditioning water circulating pump 17, the water in the lower reservoir 3 is used as a cooling water source or a heat absorption water source of the condenser 10, and when the water temperature of the lower reservoir 3 cannot meet the requirement of the condenser 10, the cooling tower 14 or the air-cooled condenser 13 is started.

The reservoir uses natural water, and water quality should be guaranteed, can not block up air conditioning system, especially fan coil, should set up the quality of water filter in air conditioning system. In order to reduce heat loss, the pool wall and the pool bottom of the upper reservoir 2 are insulated, the water surface is insulated in an overhead way by adopting a support, an insulating layer 7 is laid on the support, or the insulating plate floats on the water surface and moves along with the floating of the water surface. The energy main station is arranged near the upper reservoir 2 or the lower reservoir 3, when the energy main station is arranged near the upper reservoir 2, the water in the lower reservoir 3 is not suitable for being used as cooling water of a heat pump unit due to too high topography, and the heat pump unit can only be provided with an air-cooled condenser 13 and a cooling tower 14. When the upper reservoir 2 is too far away from the city, the temperature of the air conditioning water in the upper reservoir 2 is seriously attenuated in the conveying process, so that the air conditioning water is not suitable for being used as the air conditioning water and can be used as cooling water and a heat absorption heat source of a heat pump unit of an air conditioner user.

In fig. 2, when the reservoir has too many impurities and the water quality cannot meet the requirement of the air conditioning system, an air conditioning water heat exchange coil 34 is arranged in the upper reservoir 2, and the air conditioning water exchanges heat with cold and hot water of the upper reservoir 2 through the air conditioning water heat exchange coil 34. When cold and heat are stored at night, the valves 24, 26 and 33 are opened, the valves 25 and 27 are closed, and the heat pump unit stores cold and heat to the upper reservoir 2. In the daytime, the upper reservoir 2 enters a cold storage and heat storage release working condition, valves 25, 27, 32 and 33 are opened, valves 24, 26 and 31 are closed, air-conditioning water is sent to urban air-conditioning users after heat exchange with cold and hot water in the upper reservoir 2 through an air-conditioning water heat exchange coil 34, if the water temperature cannot meet the air-conditioning requirements after the heat exchange of the air-conditioning water, part of heat pump units can be started, and part of water in the upper reservoir 2 enters the evaporator 9 and is sent to an air-conditioning water supply pipe 29 through the air-conditioning water circulating pump 17 after being cooled or heated again. When the energy of the upper reservoir 2 is released, the heat pump unit enters a comprehensive operation condition, the valves 25, 31 and 33 are opened, the valves 24, 26, 27 and 32 are closed, and the evaporator 9 provides cold water and hot water for the urban air-conditioning users.

In fig. 3, the hydroelectric generating set 1 adopts a conventional water turbine, and has no water pump function, and the functions of pumping water to the upper reservoir 2 and storing energy are replaced by an air-conditioning water circulating pump 17 and a cooling water circulating pump 18. One scheme is that valves 21, 24, 26, 35 and 36 are opened, valves 20, 23, 25, 27 and 37 are closed, a cooling water circulating pump 18 pumps water in a lower reservoir 3 into an upper reservoir 2, an air conditioning water circulating pump 17 continuously circulates at the same time, cold and hot water produced by an evaporator 9 is sent into the upper reservoir 2 to be stored, an electromagnetic valve 15 is opened, an electromagnetic valve 16 is closed, a condenser 10 does not work, and an air-cooled condenser 13 discharges or absorbs heat into the air; alternatively, the valves 21, 24, 36, 37 are opened, the valves 20, 23, 25, 26, 27, 35 are closed, the cooling water circulating pump 18 pumps the water in the lower reservoir 3 to the evaporator 9 to be cooled or heated, and then the water is pressurized and sent to the upper reservoir 2 by the air-conditioning water circulating pump 17 to be stored, the electromagnetic valve 15 is opened, the electromagnetic valve 16 is closed, the condenser 10 is not operated, and the air-cooled condenser 13 discharges or absorbs heat to the air. The air-conditioning water circulating pump 17 and the cooling water circulating pump 18 are used for pumping water for energy storage, the lift of the water pump needs to be increased, and meanwhile, the variable-frequency water pump is matched with an air-conditioning system and is suitable for being adopted. Not limited to this figure, fig. 2 may employ a form of pumping and accumulating energy by the air-conditioning water circulation pump 17 and the cooling water circulation pump 18.

In fig. 4, the energy head station is not provided, and the heat pump unit is a heat pump unit of a city air conditioner user, and is called a "distributed heat pump unit". When cold and heat are stored at night, the distributed heat pump unit is started, the produced cold and hot water is sent to the upper reservoir 2 through the air-conditioning water supply pipe 29 and the air-conditioning water return pipe 30, the air-conditioning cold and hot water is stored in the upper reservoir 2 through continuous circulation of the air-conditioning water circulating pump 17, and at the moment, the hydroelectric generator set 1 pumps water from the lower reservoir 3 to the upper reservoir 2 for energy storage. The day-sky upper reservoir 2 provides cold and hot water for air conditioners for urban air conditioner users, when the water temperature of the upper reservoir 2 cannot meet the air conditioner requirement, water is released to the lower reservoir 3, the hydroelectric generating set 1 starts generating electricity, and at the moment, the urban air conditioner users start own distributed heat pump units to operate air conditioners. The water in the lower reservoir 3 can also be used as cooling water and a heat absorption source of the distributed heat pump unit, and the lower reservoir 3 is connected with a condenser of the distributed heat pump unit through an air conditioner cooling water return pipe 41 and an air conditioner cooling water supply pipe 42. The form shown in fig. 3 may be adopted, the valve 39 is opened, the valves 38 and 40 are closed, and the air-conditioning water circulation pump 17 and the cooling water circulation pump 18 are used to pump water to the upper reservoir 2 at night while storing cold and heat.

In fig. 5, in order to distribute cold and hot water of the air conditioner reasonably and uniformly in the upper reservoir 2, an air conditioner water supply pipe 29 and an air conditioner water return pipe 30 are arranged at two ends of the upper reservoir 2 to ensure that the air conditioner water uniformly flows on the same journey, and a water suction port 44 and a water outlet 45 are arranged on the pipes.

In fig. 6, a partition wall 46 is provided in the upper reservoir 2 to form a uniform flow path, thereby avoiding formation of a temperature dead space.

In fig. 7, this is an arrangement of the air-conditioning water heat exchange coil 34, but is not limited thereto, and there are other arrangements.

The foregoing is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the invention in any way. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all belong to the protection scope of the present invention.

Claims (5)

1. A water pumping, cold and heat accumulating power station is composed of hydroelectric generating set, upper and lower reservoirs, water leading pipe, tail water pipe and heat pump set, and features that said hydroelectric generating set is a reversible water pump-turbine, the water inlet of water leading pipe is connected to upper reservoir, the water gate is installed at interface, the water outlet of water leading pipe is connected to the water inlet of hydroelectric generating set, the water inlet of tail water pipe is connected to water outlet of hydroelectric generating set, the water outlet of tail water pipe is connected to lower reservoir, the water inlet and outlet of evaporator of heat pump set are connected to upper reservoir and air conditioner user, the water inlet and outlet of condenser of heat pump set are connected to lower reservoir, the wall and bottom of upper reservoir are insulated, the heat insulating plate is laid on support and floated on water surface, and has cooling tower.

2. A water pumping cold and heat storage power station is composed of hydroelectric generating set, upper and lower reservoirs, water leading pipe, tail water pipe and heat pump set.

3. The pumped-water cold-storage thermal storage power station according to claim 1 or 2, wherein the heat pump units are master station heat pump units or distributed heat pump units.

4. The pumped-storage thermal-storage power station according to claim 1 or 2, characterized in that the upper reservoir is provided with an air-conditioning water heat-exchange coil through which the air-conditioning water exchanges heat with the water of the upper reservoir.

5. The pumped-storage thermal storage power station of claim 1 or 2, wherein the heat pump unit comprises an air-cooled condenser and a water-cooled condenser, which are connected in parallel or in series in the system.

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