CO_2跨临界喷射制冷循环计算分析  

Calculation and analysis on transcritical ejector refrigeration cycle with CO_2

作　　者：王菲[1] 杨勇[2] 沈胜强[2] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221116 [2]大连理工大学辽宁省海水淡化重点实验室,辽宁大连116024

出　　处：《化工学报》2013年第7期2400-2404,共5页CIESC Journal

基　　金：江苏省自然科学基金项目(BK2011216);中国矿业大学启航计划;中央高校基本科研业务费专项资金项目(2012QNA55)~~

摘　　要：目前还很少有关于CO2跨临界喷射式制冷循环的研究。本文对CO2跨临界喷射制冷循环建立了热力学模型,计算了在不同的冷却压力、冷却器出口温度、加热器压力、加热器出口温度及蒸发温度下,喷射器的喷射系数、跨临界喷射制冷循环性能系数(COP)和有效性能系数(COPm)的变化趋势。结果表明:随着冷却器压力的升高,喷射器的喷射系数减小,循环的COP和COPm值先增大后减小,在某个冷却压力下存在最优值;提高冷却器的出口温度,循环的COP和COPm值均降低;提高加热器压力、加热器出口温度及蒸发温度均能增大喷射器的喷射系数和循环的COPm值。The research on transcritical ejector refrigeration cycle with CO2 is rarely reported.In this study,a thermodynamic model for a transcritical ejector refrigeration cycle is established.The changes of ejector entrainment ratio,the cycle performance coefficient（COP）and effective performance coefficient（COPm）with cooler pressure,cooler outlet temperature,heater pressure,heater outlet temperature and evaporation temperature are presented.As the cooler pressure increases,the entrainment ratio of ejector decrease,the cycle COP and COPm first increase and then decrease,with optimum values at some cooler pressures.As the outlet temperature of cooler increases,both values of COP and COPm decrease.With the increase of heater pressure,heater outlet temperature and evaporation temperature,the ejector entrainment ratio,the cycle COP and COPm are improved,while the cycle COP decreases with the increase of heater outlet temperature.

关 键 词：喷射制冷 CO2 跨临界 

分 类 号：TK511.3[动力工程及工程热物理—热能工程]