带有经济器空气源热泵在超低温环境下制热运行实验研究  

Experimental Study on Heating Operation of Air-source Heat Pump with Economizer at an Ultra-low Temperature Environment

作　　者：宋一平 常骞 李达君 吴林涛 Song Yiping;Chang Qian;Li Dajun;Wu Lintao(Hisense Air-conditioning Co.,Ltd.,Qingdao,266700,China)

机构地区：[1]海信空调有限公司,青岛266700

出　　处：《制冷学报》2024年第5期130-136,共7页Journal of Refrigeration

摘　　要：选择用带有经济器的空气源热泵机组(简称热泵机组)系统进行制热工况研究,设计4组实验对其制热性能进行研究。结果表明:在各实验工况下,主电子膨胀阀存在最佳开度,最佳开度为保证一定过热度范围所对应的最大开度,在最佳开度下,热泵机组最大值热量为额定工况的85.99%、76.58%、57.46%、38.25%,能效分别为2.21、2.08、1.95、1.55。补气电子膨胀阀的开启可以有效提升制热量,但随着补气阀开度的增大,系统能效有所降低,若以能效比作为热泵机组优化运行目标,可能导致制热量不足。此外,补气回液也是影响热泵机组制热量和能效的主要因素,在补气口未回液时,热泵机组制热量分别提高了18.35%、12.14%、25.95%,但补气口回液时,制热量降低了15.22%。This study investigates an air-source heat pump(ASHP)with an economizer in terms of its heating conditions and designs four groups of experiments to evaluate its heating performance.The results show that under each experimental condition,the main electronic expansion valve has the best opening,which is the maximum opening corresponding to a certain superheat range.Under the best opening conditions,the maximum heat of the heat pump unit is 85.99%,76.58%,57.46%,and 38.25%of the rated working condition.The corresponding energy efficiencies are 2.21,2.08,1.95,and 1.55,respectively.The opening of the replenishment electronic expansion valve can effectively improve the heating capacity;however,with an increase in the opening of the replenishment valve,the energy efficiency of the system decreases.If energy efficiency is used as the optimization objective of the heat pump unit,it may lead to insufficient heating capacity.Liquid return is also the main factor affecting the heating capacity and energy efficiency of the heat pump unit.When the replenishment port does not return the liquid,the heating capacity of the heat pump unit increases by 18.35%,12.14%,and 25.95%;when the replenishment port returns the liquid,the heating capacity is reduced by 15.22%.

关 键 词：超低温环境 空气源热泵 准二级压缩 制热量 

分 类 号：TB611[一般工业技术—制冷工程] TU83[建筑科学—供热、供燃气、通风及空调工程]