用非共沸混合工质R22/R142b实现劳伦兹循环代替R12的研究  

STUDY OF REALIZING LORENZ CYCLE USING NON-AZEO- TROPIC REFRIGERANT MIXTURE R22/R142b FOR SUBSTITUTE OF R12

作　　者：马一太[1] 吕灿仁[1] 严晋跃[1] 

机构地区：[1]天津大学

出　　处：《工程热物理学报》1990年第1期21-23,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金;国家教委科研基金

摘　　要：早在1894年,苏黎士工程师H.劳伦兹就提出一侧以冷冻盐水,另一侧以冷却水为热源的变温热源制冷机的理想循环,他当时称为多变循环。该循环由两个绝热过程和两个多变过程组成,其多变过程要保证过程的温度变化与外界热源的温度变化一致。该循环示于图1,θ_1,T_1,θ_2,T_2为循环四个拐点的温度。目前在技术上实现劳伦兹循环的方式主要有三种:The experiments are carried out on a water-to-water heat pump testing unit in which refrigerant mixture R22/R142b (weight concentration of 0.51/0.49) and pure refrigerant R12 are used. To realize Lorenz Cycle, the same inlet and outlet water temperatures of both heat source and heat sink are given as the basis of comprehensive comparison. The results show that R22/R142b is a promising working fluid which can substitute the widely used R12 to alleviate air pollution. It can increase COP by 8-10% compared with R12.

关 键 词：制冷机 循环 R22/R142B R12 

分 类 号：TB651[一般工业技术—制冷工程]