摘要
Pinch point and maximum temperature difference may occur in heat exchanger because of the non-linear relationship between the temperature and enthalpy of the zeotropic refrigerant mixtures in the two-phase region.The discriminant used to identify the pinch point or maximum temperature difference was presented by Venkatarathnam,but the discriminant can not be used to identify all the kinds of zeotropic refrigerant mixtures.The modified discriminant used to identify the pinch point and maximum temperature difference was obtained in this paper,which was proved by analyzing two zeotropic refrigerant mixtures.The results showed the possible concurrence of pinch point and maximum temperature difference in the heat exchanger.
Pinch point and maximum temperature difference may occur in heat exchanger because of the non-linear relationship between the temperature and enthalpy of the zeotropie refrigerant mixtures in the two-phase region. The discriminant used to identify the pinch point or maximum temperature difference was presented by Venkatarathnam, but the discriminant can not be used to identify all the kinds of zeotropic refrigerant mixtures. The modified discriminant used to identify the pinch point and maximum temperature difference was obtained in this paper, which was proved by analyzing two zeotropic refrigerant mixtures. The results showed the possible concurrence of pinch point and maximum temperature difference in the heat exchanger.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2009年第4期848-854,共7页
CIESC Journal
基金
国家科技支撑计划项目(2008BAJ12B00)
东南大学优秀博士学位论文基金项目(YBJJ0814)~~
关键词
非共沸制冷剂
温度滑移
窄点
zeotropic refrigerant
temperature glide
pinch point
