R449A／CO2复叠式制冷系统性能模拟研究

R449A/CO_2 cascade refrigeration system performance simulation

根据2014年欧盟517号决议,由于其高达3943的GWP值,现阶段广泛使用的R404A将在大部分制冷领域被禁用。因此,寻找合适的低GWP替代冷媒变得愈加迫切。本文将GWP仅为1282的无毒制冷剂R449A(XP40)在以CO_2为低温级冷媒的复叠系统中的性能表现进行了模拟计算并将结果与R404A的值进行了分析对比。结果表明:R449A在复叠系统中的性能表现要优于R404A,可作为其低GWP替代冷媒推广应用。

R404A with wide applications and high GWP value of 3943, will be banned to apply in most refrigeration industry according to EU Regulation No. 517 in 2014. Therefore, looking for the right alternative refrigerant with low GWP becomes more urgent. This article simulated the performance of R449A（XP40） in the cascade system with CO2 as the low temperature refriger- ant, and compared the results with R404A. The results show that R449A in cascade system performance is superior to R404A and can be as the ahernative low GWP refrigerant.