吸气压力设定值对多联机制冷性能的影响试验研究  

Experimental study on effect of suction pressure’s setting value on refrigeration performance for multi-connected air-conditioning(heat pump)unit

作　　者：赵德印 聂悦[1] 张文宇[1] Zhao Deyin;Nie Yue;Zhang Wenyu(Shanghai Building Research Institute Co.,Ltd.)

机构地区：[1]上海市建筑科学研究院有限公司

出　　处：《制冷与空调》2021年第8期74-81,86,共9页Refrigeration and Air-Conditioning

基　　金：国家重点研发计划“净零能耗建筑适宜技术研究与集成示范(2019YFE0100300)”课题——基于用户需求响应的多联式空调系统在线监测与调适技术(2019YFE0100300-1901);上海市科学技术委员会科研计划项目“基于信息融合的建筑智能环控系统关键技术与示范”(18DZ1202700)。

摘　　要：为了保证机组稳定运行和简化控制逻辑,在实际运行中,往往采用固定吸气压力(制冷时)和固定排气压力(制热时)的方法控制多联机运行。然而当多联机处于部分负荷运行状态时,仍然采用固定目标值的方法将造成一定的能源浪费。本文以一套实际建筑中的多联机为研究对象,分析改变吸气压力前后其制冷性能的变化。试验结果表明,目标吸气压力由8.4 bar(表压)调整为7.3 bar(表压)后(对应制冷剂R410A饱和温度由5℃降低至1℃),多联机名义制冷量提高38.2%,制冷季节能效比SEER降低约13.1%。In order to ensure the stable operation and simplify the control logic of multi-connected air-conditioning(heat pump)unit,fixed suction pressure(in cooling)and fixed exhaust pressure(in heating)are often adopted during actual operation.However,using the fixed target value method will make some unnecessary energy consumption when multi-connected air-conditioning(heat pump)unit is under partial load conditions.One set of multi-connected air-conditioning(heat pump)unit in office building is analyzed before and after changing the suction pressure.Experimental results show that after the target of suction pressure(gauge pressure)adjusted from 8.4 bar to 7.3 bar,which means that the corresponding refrigerant saturation temperature of R410 A is changed from 5℃to 1℃,the nominal cooling capacity is increased by 38.2%while the seasonal energy efficiency ratio(SEER)is decreased by 13.1%.

关 键 词：多联式空调(热泵)机组 吸气压力 能效比 制冷季节能效比 

分 类 号：TB6[一般工业技术—制冷工程]