替代工质R32和R290的对比研究  

Comparative Tests of Alternative Refrigerants R32 and R290

作　　者：张振亚[1] 王芳[1] 肖庭庭 刘振东[1] 王宏杰[1] 

机构地区：[1]上海理工大学,上海200093

出　　处：《流体机械》2014年第5期74-77,42,共5页Fluid Machinery

摘　　要：依据GB/T7725—2004规定的试验工况,分别对应用R32和R290的空调系统进行性能测试。在理论分析的基础上,依据试验数据,对比分析两种替代制冷剂的优缺点及其系统的改进方法。结果表明:R32单位容积制冷量高出R290约87%左右,相同制冷量下R290系统应使用更大排量的压缩机。R32具有较高的排气温度,并且R32系统相比R290系统,压比高出约7%,系统整体的能效比低约3.7%。R290系统换热器的压降要小于R32,有助于提高系统性能。但其可燃性远远大于R32,在安全设计方面有着更高的花费,系统初期改造投入比较高。AccordingtothepredeterminedconditionsfromGB/T7725-2004,performancesofR32andR290whenusedinair conditioning systems were tested.Based on theoretical analysis and experimental data,the performances and system improved methods of these two alternative refrigerants were summarized.The results showed that：cooling capacity per unit volume of R32 was higher about 87%than R290,so,for getting the same cooling capacity,R290system can use a compressor having bigger dis-placement.But the R32 system has a higherdischarge temperature,and pressure ratio is also higher about 7% than R290.Com-pared to R290 system,energy efficiency of R32 systemfell by about 3.7%.Heat exchanger pressure drop ofR290 system is less than R32,which helps to improve system efficiency.But safety performance of R290 is less than R32,which lead to a higher cost in the system safety design anda relatively high initial investment in the transformation.

关 键 词：R32 R290 试验研究 性能对比 应用分析 

分 类 号：TH137[机械工程—机械制造及自动化] TB61[一般工业技术—制冷工程]