Effect of mixture composition on the formation of pinch points in condensers and evaporators for zeotropic refrigerant mixtures

被引:63
作者
Venkatarathnam, G [1 ]
Murthy, SS [1 ]
机构
[1] Indian Inst Technol, Dept Mech Engn, Refrigerat & Airconditioning Lab, Madras 600036, Tamil Nadu, India
来源
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 1999年 / 22卷 / 03期
关键词
refrigerant; zeotropic mixtures; glide; heat exchanger; condenser;
D O I
10.1016/S0140-7007(98)00056-5
中图分类号
O414.1 [热力学];
学科分类号
摘要
In a recent study, it was shown by the authors that perfect glide matching of heat transfer fluid and the refrigerant is difficult in condensers and evaporators for many zeotropic mixtures and also that pinch points can occur in both the condensers and evaporators due to the non-linear variation of enthalpy during phase change. Also, a simple method was presented for predicting the occurrence of pinch points. In this paper, the influence of mixture composition on occurrence of pinch points is studied. From the thermodynamic analysis, it is shown that multi-component mixtures are preferable over many wide boiling binary mixtures for various applications from the point of view of pinch points and glide matching. The results are illustrated with a number of examples. (C) 1999 Elsevier Science Ltd and IIR. All rights reserved.
引用
收藏
页码:205 / 215
页数:11
相关论文
共 3 条
[1]   WIDE-BOILING REFRIGERANT MIXTURES FOR ENERGY-SAVING [J].
BENSAFI, A ;
HASELDEN, GG .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 1994, 17 (07) :469-474
[2]  
MCLINDEN MO, 1993, THERMODYNAMIC PROPER
[3]   Occurrence of pinch points in condensers and evaporators for zeotropic refrigerant mixtures [J].
Venkatarathnam, G ;
Mokashi, G ;
Murthy, SS .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 1996, 19 (06) :361-368