Regulatory pressures are forcing the phase-out of many widely used refrigeration gases and their replacement with more environmentally friendly alternatives. For example, the U.S. Environmental Protection Agency (EPA) ruled in October that domestic production of R22 (chlorodifluoromethane) should end within five years. So the industry is turning to alternatives such as ammonia, carbon dioxide and a range of hydrocarbons with low ozone depletion potential (ODP) and low global warming potential (GWP). Such hydrocarbons include: R1270 (refrigerant-grade propylene), R290 (propane), R600 (butane) and R600a (isobutene), together with raft of blends that emulate the performance…Full Story
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