空调性能最佳状态点的匹配研究  

Research on Matching Optimal State Points of Air Conditioning Performance

作　　者：余桢 陈海宁 潘李奎 王富强 Yu Zhen;Chen Haining;Pan Likui;Wang Fuqiang(Shenzhen McQuay Air Conditioning Co.,Ltd.,Shenzhen,518111,China)

机构地区：[1]深圳麦克维尔空调有限公司,深圳518111

出　　处：《制冷学报》2020年第5期96-101,共6页Journal of Refrigeration

摘　　要：为了匹配空调性能的最佳状态点,本文选用1台制冷量为5.15 kW的空调机组,实验研究了空调系统的充注量、过冷度和蒸发器出口过热度对系统制冷量及能效的影响,并提出了SH-Q、SC-EER、SC-Q、SH-EER理论匹配曲线,通过曲线匹配出空调系统的最佳状态点。实现最佳状态点匹配的途径可分为两部分:1)首次充注制冷剂充注量,根据匹配曲线找到系统最适宜的蒸发过热度和冷凝过冷度;2)根据蒸发过热度及冷凝过冷度,调整充注量和节流强度,匹配出空调系统制冷能效的最佳状态点。实验研究了蒸发过热度为0~18℃、过冷度为0~9℃时空调性能的变化规律,根据匹配曲线得到系统匹配的最佳状态点,即最适宜的过热度、过冷度分别为1.3℃、6℃,对应的制冷能效为2.94,与实验区间最小值2.64相比增加了11.4%。In order to match the best state point of air-conditioning performance,this paper selects an air conditioning unit with a refrigerating capacity of 5.15 kW as a research object.The influence of the charging capacity,the subcooling degree and the superheat degree at the evaporator outlet of the air conditioning system on the refrigerating capacity and energy efficiency of the system is experimentally studied.The theoretical matching curves of SH-Q,SC-EER,SC-Q,SH-EER are proposed,and the best state point of the air conditioning system is matched through the curve.The way to achieve the best state point matching can be divided into two parts:1)the first charge amount of refrigerant should be based on the matching curve to find the most suitable evaporation superheat degree and condensation subcooling degree of the system;2)according to the evaporation superheat degree and condensation subcooling degree,the charge amount and throttling intensity are then adjusted to match the best state point of refrigeration efficiency of the air conditioning system.According to the matching curve,the best matching state points of the system are obtained,that is,the most suitable superheat degree and subcooling degree is 1.3℃and 6℃,respectively,and the corresponding refrigeration energy efficiency is 2.94,which is 11.4%higher than the minimum value of 2.64 during the experiment.

关 键 词：最佳状态 性能匹配 空调 能效比 过热度 

分 类 号：TB657.2[一般工业技术—制冷工程] TU831.3[建筑科学—供热、供燃气、通风及空调工程]