Heat transfer medium, and heat transfer medium composition suitable for applications in coolers

Abstract

The invention provides a heat transfer medium comprising a first component, a second component and a third component; the first component is one of 1, 1, 1, 2-tetrafluoroethane (R134a), 1, 1, 1, 2, 2-pentafluoroethane (R125), 1, 1, 1, 2, 3, 3, 3-heptafluoropropane (R227ea) and trifluoroiodomethane (R13I1); the second component is one of 1, 1-difluoroethane (R152a), 2, 3, 3, 3-tetrafluoropropene (R1234yf) and trans 1, 3, 3, 3-tetrafluoropropene (R1234ze (E)); the third component is one of fluoroethane (R161), cyclopropane (RC270), dimethyl ether (RE170) and isobutane (R600a); the heat transfermedium has the environment-friendly characteristics of low GWP and zero ODP, obvious environmental protection advantages and good thermal performance, can replace R134a heat transfer medium to be applied to coolers, especially centrifugal coolers, and can be well matched with existing equipment without system redesigning.

Description

technical field [0001] The invention relates to a refrigeration low temperature technology, in particular to a heat transfer medium and a composition suitable for a cooler. Background technique [0002] Chillers are refrigeration machines that cool water, other heat transfer fluids, or process fluids by vapor compression (modified reverse Rankine), absorption, or other thermodynamic cycles. Their most common use is to air condition large offices, commercial, medical, entertainment, high-rise residential and similar buildings or complexes in a central system. Both large central and interconnected plants (often with multiple chillers each) are common for shopping malls, universities, medical and office spaces, military facilities, and district cooling systems. With the increasingly serious trend of environmental protection, for the "greenhouse effect" of HFCs, the Montreal Protocol Amendment requires a heat transfer medium that does not destroy the ozone layer and has a lower...

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Problems solved by technology

[0003] In view of this, the present invention provides a kind of heat transfer medium, this heat transfer medium has low GWP, ODP is 0, possesses good thermodynamic performance simultaneously, while effectively solving the problems such as the greenhouse effect that R134a heat transfe

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