低温室效应HCFCs替代物性能分析

Analysis on Alternatives for HCFCs with Low Greenhouse Effect

在阐述目前国内外HCFCs替代形势的基础上,对热泵空调及冷冻冷藏系统典型HCFCs制冷剂R22和其传统替代制冷剂(R410A,R407C,R404A,R507A),以及低温室效应R22替代物(R161,R290,RTJU4,R32,R717及R1234yf)的热力性能、循环性能及其可燃特性进行对比与分析。结果表明,R161,R290,RTJU4,R717,R32不仅具有零ODP较低GWP值的优势,其热力学及传热学特性也优于传统的HCFCs替代物,其中部分工质在一定的应用条件下具有较好的循环性能。R32,R1234yf和RTJU4的可燃性较小;RTJU4在系统循环性能上具有较明显的优势;R717具有较好热力学、传热学和循环特性,经进一步的系统和部件改进也具有较强的替代潜力。

After introducing the state of arts of HCFCs alternatives,the thermodynamic properties,cycling performance and flammability of the typical HCFCs refrigerants R22 and R502 and their traditional substitute refrigerants（R410A,R407C,R404A,R507A）,and several kinds of alternatives for R22 with low greenhouse effect（R161,R290,RTJU4,R32,R717 and R1234yf） which could be used for air-conditioning,freeze and refrigeration are analyzed and compared.The result shows that the R161,R290,RTJU4,R717 and R32 with zero ODP and low GWP have better thermodynamic parameters and heat transfer characteristics than the traditional substitutes for HCFCs,and some refrigerants have better cycling performance under certain application conditions.The flammability of the R32,R1234yf and RTJU4 are all lower,while the RTJU4 holds an obvious advantage on the system cycling performance.R717 holds better thermodynamic property,heat transfer characteristic and cycling performance,and has stronger alternative potential after the further improvements on the system and components.