【作者】 雷昱； 华佳亮； 张弛昊； 熊军； 陈开东； 何国庚；

【Author】 Lei Yu;Hua Jialiang;Zhang Chihao;Xiong Jun;Chen Kaidong;He Guogeng;School of Energy and Power Engineering,Huazhong University of Science and Technology;TCL Air Conditioner(Zhongshan)Co.,Ltd.;

【机构】 华中科技大学能源与动力工程学院； TCL空调器(中山)有限公司；

【摘要】 随着人们环保意识的增强和各国环保法案的出台,在房间空调器中占主导地位的R32制冷剂也将面临限制使用甚至淘汰。R487A(由R1270与R170按质量比80/20混合)作为一种混合碳氢制冷剂,兼具环保效益和节能效益,在房间空调器的应用上具有广阔前景。本文通过理论循环分析,仿真及样机实验对比了两种制冷剂在不同工况下的制冷换热性能与系统表现。系统理论循环表明R487A和R32具有相近的工作压力区间,且R487A的排气温度更低,更有利于压缩机的工作,使其在工作条件具备替代R32的可行性;仿真结果表示在相同条件下R487A的制冷量、压降均小于R32,更换12cc压缩机后可做到与R32相当的能力,且优化流路分布可在换热量基本不变的情况下大幅减小压损;试验结果说明在R32原机样机条件下直接使用R487A替代,额定制冷和低温额定制冷工况下R487A的制冷量分别为R32的90.0%和87.8%,能效为R32的111.5%和110.0%。压缩机频率升高18%后,R487A制冷量与R32相当,且能效依然高于R32。更多还原

【Abstract】 With the enhancement of people′s environmental awareness and the introduction of environmental protection laws in various countries,R32,which dominates in room air conditioners,will also face restrictions on its use or even be phased out. R487A(a mixture of R1270 and R170 in a mass ratio of 80/20)as a mixed hydrocarbon refrigerant,combines environmental benefits and energy-saving benefits,and has broad prospects for application in room air conditioners. This paper compares the refrigeration heat exchange performance and system performance of the two refrigerants under different working conditions through theoretical cycle analysis,simulation and experiment study.The theoretical cycle of the system shows that R487A and R32 have similar working pressure ranges,and the exhaust temperature of R487A is lower,which is more conducive to the operation of the compressor,making it feasible to replace R32 under working conditions;the simulation results show that under the same conditions,the cooling capacity and pressure drop of R487A are both smaller than those of R32,and after replacing the 12cc compressor,the system can achieve comparable capacity to R32,and optimizing the flow path distribution can significantly reduce pressure loss while keeping the heat exchange quantity basically unchanged;The test results show that when R487A is directly used as a substitute under the original R32 prototype conditions,the cooling capacity of R487A under rated cooling and lowtemperature rated cooling conditions is 90.0% and 87.8% of that of R32 respectively,and the energy efficiency ratio(EER)is 111.5% and 110.0% of that of R32. After the compressor frequency was increased by 18%,the cooling capacity of R487A was comparable to that of R32,and its energy efficiency was still higher than that of R32.更多还原