Park cold and heat electric energy underground energy storage system

Abstract

The utility model discloses an underground cold and hot electric energy storage system for a park. The underground cold and hot electric energy storage system comprises a low-pressure gas storage tank arranged underground and used for storing low-pressure carbon dioxide and a plurality of high-pressure gas storage tanks arranged in the low-pressure gas storage tank and used for storing high-pressure carbon dioxide. A compressor, a heat exchanger and a heat accumulator for supplying heat to the park are arranged on the ground, heat generated when the compressor works is transmitted to the heat accumulator through the heat exchanger, a compressor air inlet pipe of the compressor extends to the lower side of the low-pressure air storage tank, and an air transfer pipe of the compressor is communicated with the air inlet branch pipe; a turbine and a recooler are arranged on the side portion of the low-pressure air storage tank, a cold accumulator for supplying cold to the park is arranged at the bottom of the low-pressure air storage tank, cold generated when the turbine generates electricity and works is transmitted to the cold accumulator through the recooler, the fluid receiving end of the turbine is communicated with the air outlet branch pipe, and a turbine exhaust pipe of the turbine extends into the low-pressure air storage tank. On the premise that refrigeration and heating loads are met, generating capacity is supplemented, carbon dioxide environment-friendly gas is adopted, and safety and reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the park cold and heat electric energy recycling technology field, concretely relates to a park cold and heat electric energy underground energy storage system. BACKGROUND

[0002] Industrial park has the demand of refrigeration and hot water preparation, and the power consumption of industrial park is large, the existing industrial park mostly uses steam or fuel as the driving heat source, which is high in cost and pollutes the environment, and the air conditioner is used for refrigeration, and the existing air conditioner uses chlorofluorocarbon as refrigerant, which can cause environmental damage and greatly increase the power consumption. How to provide an equipment that can meet the refrigeration and heating load, supplement the power generation and be environmentally friendly is a problem to be solved. CONTENT

[0003] The utility model relates to a park cold and heat electric energy underground energy storage system.

[0004] In order to solve the above technical problems, the utility model adopts the technical scheme of a park cold and heat electric energy underground energy storage system, characterized by comprising a low-pressure gas tank arranged below the ground for storing low-pressure carbon dioxide and a plurality of high-pressure gas tanks arranged in the low-pressure gas tank for storing high-pressure carbon dioxide, a high-pressure gas tank inlet pipe is arranged on the upper side of the high-pressure gas tank, an inlet valve is installed on the high-pressure gas tank inlet pipe, the plurality of high-pressure gas tank inlet pipes are communicated with an inlet branch pipe, a high-pressure gas tank outlet pipe is arranged on the lower side of the high-pressure gas tank, an outlet valve is installed on the high-pressure gas tank outlet pipe, and the plurality of high-pressure gas tank outlet pipes are communicated with an outlet branch pipe.

[0005] A compressor, a heat exchanger and a heat accumulator for supplying heat to the park are arranged on the ground, the heat generated by the compressor during operation is transmitted to the heat accumulator through the heat exchanger, the compressor inlet pipe of the compressor extends into the lower side of the low-pressure gas tank, and the gas transfer pipe of the compressor is communicated with the inlet branch pipe.

[0006] A turbine and a subcooler are arranged on the side of the low-pressure gas tank, a cold accumulator for supplying cold to the park is arranged at the bottom of the low-pressure gas tank, the cold generated by the turbine during power generation is transmitted to the cold accumulator through the subcooler, the fluid receiving end of the turbine is communicated with the outlet branch pipe, and the turbine exhaust pipe of the turbine extends into the low-pressure gas tank.

[0007] The park cold and heat electric energy underground energy storage system has the characteristics that the number of high-pressure gas tanks is 2-3.

[0008] The park cold and heat electric energy underground energy storage system has the characteristics that the volume of the low-pressure gas tank is 500-600 times the volume of the high-pressure gas tank.

[0009] The underground energy storage system for cold, heat, electricity and gas of the park has the characteristics that a pressure relief valve is arranged on the high-pressure gas tank.

[0010] The underground energy storage system for cold, heat, electricity and gas of the park has the characteristics that the compressor is powered by valley electricity.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The utility model discloses a low-pressure gas tank for storing low-pressure carbon dioxide is dug and installed underground, a high-pressure gas tank for storing high-pressure carbon dioxide is arranged in the low-pressure gas tank, the high compression and high expansion performance of carbon dioxide is utilized, the repeated use of gas is realized, carbon dioxide is pollution-free, environmentally friendly and reliable, and the utility model is convenient to use.

[0013] 2. The utility model discloses a compressor is arranged on the ground, the low-pressure carbon dioxide in the low-pressure gas tank is compressed into high-pressure carbon dioxide gas, the compressor is conveyed to the high-pressure gas tank, the compressor generates heat at this moment, the heat generation is transmitted to the heat accumulator through the heat exchanger, and the heat energy storage of the park is realized.

[0014] 3. The utility model discloses a novel and reasonable design, a turbine is arranged on the side of the low-pressure gas tank, a cold accumulator is arranged at the bottom, the turbine receives the high-pressure fluid output in the high-pressure gas tank, generates electricity and produces cold at the same time, the cold energy is transmitted to the cold accumulator through the re-cooler, the cold energy and the electricity energy of the park are stored, in addition, the turbine exhaust pipe of the turbine discharges low-pressure carbon dioxide and conveys to the low-pressure gas tank, realizes the recycling of carbon dioxide gas, saves energy and cost, and is convenient to use.

[0015] In conclusion, the utility model discloses a novel and reasonable design, under the premise of satisfying the refrigeration and heat supply load, the power generation is supplemented, carbon dioxide environmentally friendly gas is used, and the utility model is safe and reliable, and convenient to use.

[0016] The technical scheme of the utility model will be further described in detail below with the drawings and embodiments. DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] MARK DESCRIPTION:

[0019] 1 - ground; 2 - low-pressure gas tank; 3 - high-pressure gas tank;

[0020] 4 - high-pressure gas tank inlet pipe; 5 - inlet valve; 6 - pressure relief valve;

[0021] 7 - high-pressure gas tank outlet pipe; 8 - outlet valve; 9 - inlet branch pipe;

[0022] 10 - compressor; 11 - gas transfer pipe; 12 - compressor intake pipe;

[0023] 13 - heat exchanger; 14 - heat accumulator; 15 - gas outlet branch pipe;

[0024] 16 - turbine; 17 - turbine exhaust pipe; 18 - subcooler;

[0025] 19 - cold accumulator. DETAILED DESCRIPTION

[0026] As Figure 1 shown, the utility model includes low pressure gas tank 2 below ground 1 for storing low pressure carbon dioxide and multiple high pressure gas tank 3 for storing high pressure carbon dioxide in low pressure gas tank 2, the upside of high pressure gas tank 3 is provided with high pressure gas tank intake pipe 4, and intake valve 5 is installed on high pressure gas tank intake pipe 4, multiple high pressure gas tank intake pipes 4 all communicate with intake branch pipe 9, the downside of high pressure gas tank 3 is provided with high pressure gas tank exhaust pipe 7, and exhaust valve 8 is installed on high pressure gas tank exhaust pipe 7, multiple high pressure gas tank exhaust pipes 7 all communicate with gas outlet branch pipe 15;

[0027] The ground 1 is provided with compressor 10, heat exchanger 13 and heat accumulator 14 for supplying heat to the park, and the heat generated when compressor 10 works is transferred to heat accumulator 14 through heat exchanger 13, the compressor intake pipe 12 of compressor 10 extends into the downside of low pressure gas tank 2, and the gas transfer pipe 11 of compressor 10 communicates with intake branch pipe 9;

[0028] The side of low pressure gas tank 2 is provided with turbine 16 and subcooler 18, the bottom of low pressure gas tank 2 is provided with cold accumulator 19 for supplying cold to the park, the cold generated when turbine 16 generates electricity works is transferred to cold accumulator 19 through subcooler 18, the fluid receiving end of turbine 16 communicates with gas outlet branch pipe 15, and the turbine exhaust pipe 17 of turbine 16 extends into low pressure gas tank 2.

[0029] The cold accumulator 19 for supplying cold to the park is arranged at the bottom of low pressure gas tank 2, which reduces the temperature of high and low pressure tanks, and also reduces the pressure of carbon dioxide in the tank, and the high pressure gas tank 3 is arranged in the low pressure gas tank 2, which ensures the safe use of the energy storage system.

[0030] In the embodiment, the number of high pressure gas tank 3 is 2-3.

[0031] In the embodiment, the volume of low pressure gas tank 2 is 500-600 times the volume of high pressure gas tank 3, which ensures the safe use of the energy storage system.

[0032] In the embodiment, the high-pressure gas tank 3 is provided with a pressure relief valve 6, which ensures the safe use of the high-pressure gas tank 3. When the pressure is too high, the pressure relief valve 6 is used to release the gas, so as to prevent the high-pressure gas tank 3 from bursting. When the pressure is too high, the pressure relief valve 6 is used to discharge carbon dioxide into the low-pressure gas tank 2, so as to realize the recycling of carbon dioxide gas.

[0033] In the embodiment, the compressor 10 is powered by valley electricity, which saves electricity cost.

[0034] The low-pressure gas tank for storing low-pressure carbon dioxide is dug and installed underground, and the high-pressure gas tank for storing high-pressure carbon dioxide is arranged in the low-pressure gas tank. Through the high compression and high expansion performance of carbon dioxide, the repeated use of gas is realized, and the carbon dioxide is pollution-free and environmentally friendly. The low-pressure carbon dioxide in the low-pressure gas tank is compressed into high-pressure carbon dioxide gas by the compressor arranged on the ground. The compressed carbon dioxide gas is high-pressure high-temperature gas, which is transported from the compressor to the high-pressure gas tank. At this time, the compressor generates heat, which is transferred to the heat accumulator through the heat exchanger, so as to realize the heat energy storage of the park. The turbine is arranged on the side of the low-pressure gas tank, and the cold accumulator is arranged at the bottom. The turbine receives the high-pressure fluid output from the high-pressure gas tank, generates electricity and produces cold at the same time. The cold energy is transferred to the cold accumulator through the subcooler, so as to realize the cold energy and electrical energy storage of the park. In addition, the turbine exhaust pipe of the turbine discharges low-pressure carbon dioxide to the low-pressure gas tank, so as to realize the recycling of carbon dioxide gas, save energy and reduce cost.

[0035] The above is only a preferred embodiment of the utility model, and does not limit the utility model. Any simple modification, change and equivalent structure change according to the technical essence of the utility model are still within the protection scope of the utility model technical scheme.

Claims

1. A park cold heat and electricity energy underground energy storage system, characterized in that: The low-pressure gas tank (2) for storing low-pressure carbon dioxide is arranged below the ground (1), and a plurality of high-pressure gas tanks (3) for storing high-pressure carbon dioxide are arranged in the low-pressure gas tank (2), the upper side of the high-pressure gas tank (3) is provided with a high-pressure gas tank gas inlet pipe (4), the gas inlet valve (5) is arranged on the high-pressure gas tank gas inlet pipe (4), the plurality of high-pressure gas tank gas inlet pipes (4) are communicated with the gas inlet branch pipe (9), the lower side of the high-pressure gas tank (3) is provided with a high-pressure gas tank gas outlet pipe (7), the gas outlet valve (8) is arranged on the high-pressure gas tank gas outlet pipe (7), and the plurality of high-pressure gas tank gas outlet pipes (7) are communicated with the gas outlet branch pipe (15). The compressor (10), the heat exchanger (13) and the heat accumulator (14) for supplying heat to the park are arranged on the ground (1), the heat generated by the compressor (10) is transmitted to the heat accumulator (14) through the heat exchanger (13), the compressor gas inlet pipe (12) of the compressor (10) extends to the lower side of the low-pressure gas tank (2), and the gas transfer pipe (11) of the compressor (10) is communicated with the gas inlet branch pipe (9). The turbine (16) and the subcooler (18) are arranged on the side of the low-pressure gas tank (2), the cold accumulator (19) for supplying cold to the park is arranged at the bottom of the low-pressure gas tank (2), the cold generated by the turbine (16) during power generation is transmitted to the cold accumulator (19) through the subcooler (18), the fluid receiving end of the turbine (16) is communicated with the gas outlet branch pipe (15), and the turbine exhaust pipe (17) of the turbine (16) extends into the low-pressure gas tank (2).

2. The park cold thermal electrical energy underground energy storage system of claim 1, wherein: The number of the high-pressure gas tank (3) is 2-3.

3. The park cold thermal electrical energy underground energy storage system of claim 1, wherein: The volume of the low-pressure gas tank (2) is 500-600 times the volume of the high-pressure gas tank (3).

4. The park cold thermal electrical energy underground energy storage system of claim 1, wherein: The high-pressure gas tank (3) is provided with a pressure relief valve (6).

5. The park cold thermal electrical energy underground energy storage system of claim 1, wherein: The compressor (10) is powered by valley electricity.

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