具有精馏装置的自动复叠制冷循环分析  

ANALYSIS OF AN AUTO-REFRIGERATING CASCADE SYSTEM UTILIZING A RECTIFYING COLUMN

作　　者：张绍志[1] 王剑锋[1] 张红线[1] 陈光明[1] 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027

出　　处：《工程热物理学报》2001年第1期25-27,共3页Journal of Engineering Thermophysics

基　　金：浙江省151人才工程基金

摘　　要：本文提出了一种新的具有精馏装置的自动复叠式制冷循环，并以 Ｒ１３４ａ／Ｒ２３为制冷剂。对新循环进行了热力学分析，建立了能量与质量平衡方程，分析了循环工质配比、吸气温度及精馏塔操作压力对压缩机压比及系统ＣＯＰ的影响。作者进一步将新循环与二级分凝循环在压比控制于９～１２、冷凝器出口温度保持在４０℃的前提条件下进行了性能上的比较，发现新循环既可达到更低的制冷温度，又可在相同平均蒸发温度下获得更高的ＣＯＰ。This paper presents a new auto-refrigerating cascade cycle that employs a rectifying column. A thermodynamic analysis of the cycle is conducted with R134a/R23 as working fluid. Energy and mass balance equations are established for each component of the system. The mixture composition, the suction temperature and the operating pressure of the rectifying column, are analyzed of their impacts on compression ratio and coefficient of performance. Furthermore, a comparison is made between the new cycle and the two-separator cycle when the compression ratio is limited between 9 and 12 and the outlet temperature of the condenser is fixed at 40℃. It is found that the new cycle can not only offer a lower refrigerating temperature but also have a higher COP provided that the average evaporating temperature is the same.

关 键 词：复叠式制冷系统 热力学分析 精馏装置 制冷循环 

分 类 号：TB61[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]