【作者】 马一太； 赵丽；

【Author】 Ma Yitai,Zhao Li (Thermal Institute of Tianjin University;Tianjin,300072)

【机构】 天津大学热能研究所；

【摘要】 本文针对常规工质制冷与热泵系统中采用膨胀机代替节流阀效率提高的程度进行了分析、同时对膨胀机的测试方法进行了介绍,作为常规工质膨胀机设计与开发的准备工作。根据计算结果,常规制冷剂在一般工况下,当膨胀机效率达到70%时,理论上可回收的膨胀功占压缩功的2-15%,并增加10-20%的制冷量,这样对COP或EER的贡献可达3.6%～20%。在大中型系统中,其回收功的数量比较可观。若能推广应用,其节能潜力是巨大的,完全可以作为分布式能源系统的分散能源资源利用起来。另外由于在大中型系统中进行膨胀机试验不太容易实现,本文提出三角循环模式作为试验膨胀机的方法。更多还原

【Abstract】 In this paper,aiming at the conventional refrigeration and heat pump system of which replacing throttle by expander,the degree of its efficiency will be incresed has been analysed and the testing schemes of the expander has been introduced,as the preparing of research and development of conventional refrigerant expander.According to the calculation,conventional refrigerants in general condition,the recoverable expansion work account for 5-12% of the compression work in theory,at the same time,cooling capacity of the system increase 10-20%,which result in the COP or EER of the system up by about 15%.In the medium or large systems,the number of its recovery will be more objective.Its energy saving potential is enormous when expander be promoted use,and can completely be utilized as distributed energy resources.Moreover,this paper proposed triangle cycle model to test expander instead of testing in the large or medium system.更多还原