English

应用科学学报 ›› 1996, Vol. 14 ›› Issue (3): 291-294.

• 论文 • 上一篇    下一篇

热阻、热漏和内不可逆性对制冷机性能的影响

陈林根, 孙丰瑞   

  1. 海军工程学院
  • 收稿日期:1994-11-22 出版日期:1996-09-30 发布日期:1996-09-30
  • 作者简介:陈林根:副教授,海军工程学院动力工程系,武汉 430033

THE EFFECTS OF HEAT RESISTANCE, HEAT LEAK, AND INTERNAL IRREVERSIBILITY ON THE PERFORMANCE OF THE REFRIGERATION PLANTS

CHEN LINGEN, SUN FENGRUI   

  1. Naval Academy of Engineering
  • Received:1994-11-22 Online:1996-09-30 Published:1996-09-30

PDF

85

被引次数

4

摘要： 在考虑工质与热源间热阻损失的内可逆卡诺制冷机模型基础上,用一常数项表示热漏损失,用另一常系数项表示循环中除热阻和热漏外的其余内不可逆性(如摩擦、涡流和非平衡效应等).建立了一个新的不可逆制冷机模型,导出了其最佳制冷率与制冷系数间的优化关系和最大制冷系数及其相应的制冷率.分析了热阻、热漏和内不可逆性对循环特性的影响.

关键词: 有限时间热力学, 不可逆制冷机, 性能优化

Abstract: On the basis of the endoreversible refrigeration cycle model which considers only the irreversibility of heat resistance between working fluid and heat reservoirs, this paper presents a new irreversible refrigerator model by add a constant parameter to represent the loss of heat leak, and a constant coefficient to represent the internal irreversibilities, such as friction, turbulence, non-equilibrium and so on. The relation between the optimal rate of refrigeration(ROR) and the coefficient of performance (COP) of the model is derived, the maximum COP and the corresponding ROR are obtained, and the effects of heat resistance, heat leak and internal irreversibility on the performance of the refrigeration plant are analysed.

Key words: finite-time thermodynamics, irreversible refrigerator, performance optimization