Mixed non-combustible cold storage medium

A cold storage medium, monofluoromethane technology, applied in the field of mixed non-flammable cold storage medium, can solve the problems of potential safety hazards, non-flammability, high working pressure, etc., and achieve the effect of solving the problem of high freezing point

Active Publication Date: 2019-07-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-carbon alkanes have the characteristics of low freezing point and good fluidity, but they are flammable, and there is a risk of explosion in large-scale applications; rare gases such as Ar have low freezing points and are non-flammable, but their working pressure is too high. There are safety hazards; non-flammable hydrofluorocarbons are non-flammable and have moderate pressure, but their freezing point is too high

Method used

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  • Mixed non-combustible cold storage medium
  • Mixed non-combustible cold storage medium
  • Mixed non-combustible cold storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 , a solid-liquid equilibrium phase diagram of a binary mixed medium composed of difluoromethane (R32) and trifluoromethane (R23) provided by the invention. When the mole fraction of trifluoromethane is 0.6547, the binary mixed medium can reach the lowest eutectic temperature of 107.1634K.

Embodiment 2

[0024] see figure 2 , a solid-liquid equilibrium phase diagram of a binary mixed medium composed of difluoromethane (R32) and 2-1,1,1,2 tetrafluorochloroethane (R124) provided by the present invention. When the mole fraction of difluoromethane is 0.03666, the binary mixed medium can reach the lowest eutectic temperature of 73.3996K.

Embodiment 3

[0026] see image 3 , a solid-liquid equilibrium phase diagram of a binary mixed medium composed of difluoromethane (R32) and difluorochloromethane (R22) provided by the invention. When the mole fraction of difluoromethane is 0.3266, the binary mixed medium can reach the lowest eutectic temperature of 105.9541K.

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Abstract

The invention provides a mixed non-combustible cold storage medium, comprising at least two of carbon trifluoride, carbon difluoride, trifluoroiodomethane, difluorochloromethane, 2-chloro-1,1,1,2-tetrafluoroethane, methylfluoride, perfluoropropane and carbon tetrafluoride. According to the multi-component non-combustible cold storage medium provided by the invention, two or more non-combustible working media are mixed, so that the defects that an existing liquefied air energy storage medium is relatively high in freezing point, has flammability and the like are overcome. Besides, the mixed non-combustible cold storage medium provided by the invention can also comprise one or more of dichlorodifluoromethane, chlorotrifluoromethane and monochlorodifluoromethane according to different use temperatures, so that the eutectic temperature point of the energy storage medium is further reduced.

Description

technical field [0001] The invention relates to the technical field of cold storage medium in an air energy storage system, in particular to a mixed non-flammable cold storage medium. Background technique [0002] Under the background of increasingly prominent contradiction between energy supply and demand, people gradually increase the development and utilization of green renewable energy such as solar energy, wind energy and water energy. However, renewable energy has the disadvantages of randomness and intermittency. When it is connected, it will have an impact on the power grid and even cause large-scale vicious accidents. Energy storage technology is a key technology to realize large-scale access to renewable energy, power system peak shifting and valley filling, and distributed energy supply system. It is currently a solution to realize the security and stability of renewable energy. [0003] As a large-capacity energy storage technology, liquefied air energy storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 赵延兴公茂琼王宪董学强
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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