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FLUID MACHINERY Vol. 46，No.9，2018
收稿日期： 2018-04-25 修稿日期： 2018-07-19文章编号：1005-0329（2018）09-0084-05R417A 和R22混合制冷剂应用于低温空气源
热泵的试验研究
李 丹1，李德英1，张 帅2，冯 硕1
（1.北京建筑大学，北京 100044；2.天津大学，天津 300072）
摘 要： 选用REFPROP 9.0制冷剂计算程序，分析模拟了R22和R417A 在4种不同配比下混合构成制冷剂的热物性参数，并计算了不同比例下的理论循环特性，得到最佳比例为7：3。在2种低温工况（-7.6 ℃和-12 ℃）下，分别将4种混合制冷剂充注到一台低温空气源热泵机组，对压缩机吸排气压力、压缩机吸排气温度、压缩机功率、制热量、能效比等参数进行测试记录，并与R22制冷剂进行对比分析。结果表明：试验和理论相一致，最佳比例为7：3。该混合制冷剂系统的单位制热量和COP 略低于R22系统，但是吸、排气压力，吸、排气温度以及压缩机运行功率均低于R22。
关键词： R417A ；R22；混合制冷剂；空气源热泵
中图分类号： TH12；TH3 文献标志码： A doi ：10.3969/j.issn.1005-0329.2018.09.016
Experimental Research on Application of R417A and R22 Refrigerant Mixture in Low Temperature
Air Source Heat Pumps
LI Dan 1，LI De-ying 1，ZHANG Shuai 2，FENG Shuo 1
（1.Beijing University of Civil Engineering and Architecture ，Beijing 100044，China ；
2.Tianjin University ，Tianjin 300072，China ）Abstract： The REFPROP 9.0 refrigerant calculation program was used to analyze and simulate the thermophysical properties of R22 and R417A refrigerant mixture at four different mixing ratios，and the theoretical cycle characteristics at different ratios were calculated and the optimal ratio of 7:3 was obtained. Under two low-temperature operating conditions (-7.6℃ and -12℃)，four kinds of refrigerant mixtures were respectively charged into a low-temperature air source heat pump unit，the suction and exhaust pressure，the suction and exhaust temperature，the power，heating capacity，energy efficiency ratio and other parameters of the compressor were recorded and compared with R22 refrigerant. The results show that，the experiment was consistent with the theory，and the optimal ratio was 7:
3. The unit heating capacity and COP of the refrigerant mixture system were slightly lower than those of the R22 system，but the suction and exhaust pressure，suction and exhaust temperature，and operating power of the compressor were all lower than those of the R22 system.
Key words： R417A；R22；refrigerant mixture；air source heat pump
0 引言
R22制冷剂具有优良的热工和传输性能，在空调和其他行业得到了广泛的应用［1］。但是R22不仅对臭氧层具有破坏作用，还会产生温室效应，据《蒙特利尔议定书》及后续一系列的协议
规定，在未来10~20年内，将在全球范围内开展
全面禁止使用R22制冷剂的行动［2］。根据实际
空气源热泵机组的测试，R22的排气温度和排气压力都过高，会降低机组的性能。因此，R22已经不再是发展的趋势，需要对制冷剂工质进行重新选择。选择合适的R22的替代制冷剂，要考虑到不同制冷剂的热物性，环保性，安全性，同时还应考虑对热泵机组的改动较小等问题［3，4］。目前，最常见的R22的替代品，有R407C ，R410A ，R32，
万方数据