【摘 要】
：
The use of CFCs and HCFCs is severely restricted and,in an effort to protect the ozone layer,they are being replaced with HFCs.However,leakage of this refrigerant into the air from active or end-of-li
【机 构】
：
Tokyo University,Japan
【出 处】
：
2016冷冻空调亚洲大会(8th Asian Conference on Refrigeration and Air-c
论文部分内容阅读
The use of CFCs and HCFCs is severely restricted and,in an effort to protect the ozone layer,they are being replaced with HFCs.However,leakage of this refrigerant into the air from active or end-of-life air conditioners is a serious environmental issue owing to its high global warming potential(GWP).Thus,it is now universally acknowledged that replacing HFCs with lower-GWP refrigerants is essential to rectifying this problem.Many studies have been conducted over the past several years on the use of lower-GWP refrigerants for stationary air conditioners.Additionally,in recognition of the urgent need to reduce global warming,regulations have been imposed in the world regarding the use of high-GWP refrigerants such as HFCs.The low-GWP refrigerants R1234yf and R32 are promising candidates to replace conventional HFC refrigerants.However,these refrigerants are not very stable in air and are flammable.The state of the art of the development of lower-GWP refrigerants and safety study of mildly flammable refrigerants will be presented.
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