Liquid precooling refrigerant storage system
A working fluid and liquid technology, applied in the field of liquid pre-cooling working fluid cold storage system, can solve the problems of inability to meet the overall liquefaction requirements, large unsteady heat transfer temperature difference, etc., to reduce losses, small heat transfer temperature difference, and improve storage. The effect of energy efficiency
Active Publication Date: 2018-07-31
中绿中科储能技术有限公司
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Problems solved by technology
Among the solid materials, rocks, ceramics, and metal blocks are used to store cold energy by using the sensible heat of the cold storage medium. However, due to the heat conduction of the solid medium in the process of cold storage and cooling, a large unsteady heat transfer temperature difference is generated, and the current cold storage efficiency is average. It can only reach 50%, which makes it impossible to meet the overall liquefaction requirements; the other type is solid-liquid phase change latent heat storage medium, such as one or more of ammonia and its aqueous solution, salt aqueous solution, alcohols and their aqueous solution, but currently They have not been used as phase change heat storage materials from room temperature to liquid nitrogen temperature region
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[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only ...
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The present invention provides a liquid pre-cooling working fluid cold storage system, which is used for low-temperature liquid air energy storage, which includes a cold storage heat exchange unit, a cooling release heat exchange unit, and a working medium storage unit for storing liquid precooling working medium. The substance storage unit is connected between the cold storage heat exchange unit and the cooling release heat exchange unit, forming a channel for the liquid precooling working medium to circulate, exchange heat and store in liquid phase. The liquid precooling working medium cold storage system adopts the liquid medium in the room temperature-liquid nitrogen temperature zone as the cold storage working medium, and uses the heat exchanger as the cooling capacity exchange device, which can realize a very small heat transfer temperature difference inside the heat exchanger, reducing Loss in the heat transfer process, which is conducive to improving the energy storage efficiency of the system.
Description
technical field [0001] The invention relates to the technical field of energy storage, in particular to a liquid precooling working medium cold storage system for low-temperature liquid air energy storage. Background technique [0002] At present, with the increasing popularity of renewable energy, the importance of large-scale energy storage systems in the power system has become increasingly prominent. Large-scale power energy storage technology can effectively solve the problem of unstable power generation of intermittent energy sources such as wind energy, solar energy, and tidal energy. As an emergency uninterruptible power supply. [0003] By the end of 2013, the total installed capacity of wind power in my country was 91.4GW, and the total installed capacity of solar power was 10GW; it is estimated that by 2020, the total installed capacity of wind power in my country will reach 200GW, and the total installed capacity of solar power will reach 50GW. Corresponding to...
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IPC IPC(8): F25J1/02
CPCF25J1/0012F25J1/004F25J1/0045F25J1/0201F25J1/0251F25J2205/24
Inventor 王俊杰李路遥王思贤杨鲁伟邓章
Owner 中绿中科储能技术有限公司