GB 21455—2019中低温中间制冷工况参数获取方法不唯一导致的APF值计算的问题分析  

Analysis on APF Calculation Problem Caused by the Optional Method to Obtaining Performance Parameters of Low-temperature Intermediate Refrigeration Condition in GB 21455—2019

作　　者：陈炫丞 庄大伟[1] 丁国良[1] 余岳峰[1] 成建宏[2] 吴国明 Chen Xuancheng;Zhuang Dawei;Ding Guoliang;Yu Yuefeng;Cheng Jianhong;Wu Guoming(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,200240,China;Chinese National Institute of Standardization,Beijing,100191,China;Midea Corporate Research Center,Foshan,528311,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]中国标准化研究院,北京100191 [3]美的集团中央研究院,佛山528311

出　　处：《制冷学报》2023年第4期127-132,共6页Journal of Refrigeration

基　　金：国家自然科学基金(51906135)资助项目;生态环境部对外合作与交流中心“房间空调器及家用热泵热水器行业第二阶段HCFC淘汰管理计划”(FECO/LY1/S/21/170)资助。

摘　　要：按GB 21455—2019确定空调器能效APF时,低温中间制冷工况性能参数既可采用测试法也可采用换算法;同一空调器在这2种不同的方法下,会有2种不同的APF值。针对国标规定中的方法不唯一而造成的结果差异,需要分析产生该差异的合理性,提出改进方案。本文基于APF的定义公式,分析采用测试法和换算法获取低温中间制冷工况性能参数造成APF存在差异的原因;指出国标中给出的测试法,会导致额定中间制冷工况能效的变化趋势与计算得到的APF值变化趋势相反,这是不合理的。将国标规定的获取低温中间制冷工况性能参数的方法,由“既可测试获得也可根据额定中间制冷工况参数换算获得”改为“仅能根据额定中间制冷工况参数换算获得”是可供选择的解决方案。To evaluate the APF of an air conditioner according to GB 21455—2019,the performance parameters of low-temperature intermediate cooling conditions can be measured or converted,resulting in two different APF valuesusing these two different methods in the same air conditioner.Considering the difference in results obtained by the different methods in the national standard,it is necessary to analyze the rationality of the difference and propose an improvement plan.Based on the definition formula of APF,this study presents the reason for the difference in the APF value determined by the test method and the conversion method at the low-temperature intermediate refrigeration condition.The test method given in the national standard causes a variation in energy efficiency under rated intermediate cooling conditions,contrary to the variation in the calculated APF value,which is not reasonable.One possible way to solve the problem of non-uniqueness of APF values is to change the method of obtaining the performance parameters of the low-temperature intermediate refrigeration operating condition stipulated in the national standard from"obtained by testing or conversion according to the rated intermediate refrigeration operating condition"to"obtained only by conversion according to the rated intermediate refrigeration operating condition."

关 键 词：APF 空调器 低温中间制冷工况 空调器能效标准 

分 类 号：TB611[一般工业技术—制冷工程] TB657.2