变工况下跨临界二氧化碳空气源热泵系统性能的实验研究  

Experimental Investigation on Transcritical Carbon Dioxide Air Source Heat Pump System Performance under Variable Working Condition

作　　者：郑梓君 陶乐仁[1] 林智博 虞中旸 ZHENG Zi-jun;TAO Le-ren;LIN Zhi-bo;YU Zhong-yang(College of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,China,200093)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《热能动力工程》2022年第10期60-65,共6页Journal of Engineering for Thermal Energy and Power

基　　金：上海市动力工程多相流动与传热重点实验室项目(13DZ2260900)。

摘　　要：以跨临界二氧化碳空气源热泵系统为研究对象,研究了电子膨胀阀开度、压缩机频率对系统COP以及制热量的影响,并提出更高效的热泵运行方案。实验结果表明:在不同的阀开度下,系统COP均出现先上升后下降的趋势,随着加热过程进行,阀开度越大COP下降的幅度越大;压缩机频率的提升会使系统最大COP下降;系统在75 Hz下加热水箱温度至38℃后,将系统频率调节至85 Hz可以使系统在保持高COP运行的同时减少加热时长,加热速率提升约18%。The transcritical carbon dioxide air source heat pump system was taken as the research target,to research the impact of different adjustment methods on system performance and heating capacity by changing the openings of the electronic expansion valve(EEV)and the frequency of the compressor,and propose a operation plan for optimizing the heat pump.The experimental results show that as the heating process progresses,the COP and heating capacity of the system under different EEV openings both increase first and then decrease.The larger the openings of EEV is,the greater the decrease of COP is.The increase of the compressor frequency will reduce the maximum COP of the system.After the system heats the water tank temperature to 38℃at 75 Hz,adjusting the system frequency to 85 Hz can reduce the heating time and increase the heating rate by about 18%while maintaining high COP operation of the system.

关 键 词：二氧化碳 空气源热泵 实验研究 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]