冷藏库用风冷太阳能双级水喷射制冷系统性能分析  

Performance analysis on a solar-powered air-cooled two-staged ejector refrigeration system with water as refrigerant for cold store

作　　者：陈洪杰[1] 卢苇[1] 郑立星 潘树林[1] 冯冰凌[1] 

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《农业工程学报》2011年第2期302-306,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：广西自然科学基金资助(桂科青0991007);广西研究生教育创新计划资助项目(105931003021)

摘　　要：对额定制冷量为8.3kW的冷藏库用风冷太阳能双级水喷射制冷系统进行了变工况性能分析。该系统的制冷量随冷藏温度升高而增大,随环境温度升高而减小,随太阳辐照度增强而增大;性能系数(COP)的变化规律与制冷量类似,其差别是随太阳辐照度增强先迅速增大,但当太阳辐照度增大到一定程度后,COP基本保持稳定。在正常使用条件下(冷藏温度不低于6℃,环境温度不高于38℃,太阳辐照度不低于500W/m2),系统的制冷量为5.6～20kW,COP为0.075～0.112。该系统能较好地与亚热带典型城市南宁的果蔬盛产季节气候条件相匹配。The performance was analyzed on a solar-powered air-cooled two-staged ejector refrigeration system using water as refrigerant with rated refrigeration capacity of 8.3 kW for cold store.The refrigeration capacity of the proposed system increases with the rising of cold storage temperature and enhancement of solar irradiance,while decreases with the rising of ambient temperature.The coefficient of performance （COP） has similar changing trend with that of the refrigeration capacity except that it increases rapidly with the enhancement of solar irradiance firstly and then become stable after solar irradiance exceeding a certain value.The refrigeration capacity is 5.6–20 kW and the COP 0.075–0.112 under the normal operating conditions with the cold storage temperature over 6℃,ambient temperature below 38℃ and solar irradiance surpassing 500 W/m2.The proposed system can match the climatic conditions in fruits and vegetables harvest season of Nanning,a typical city in subtropical zone.

关 键 词：太阳能 喷射制冷 冷藏 

分 类 号：TB6[一般工业技术—制冷工程] S214.4[农业科学—农业机械化工程]