【作者】 马一太； 孙方田；

【Author】 Ma Yitai Sun Fangtian (Thermal Energy Research Institute of Tianjin University, Tianjin 300072, China)

【机构】 天津大学热能研究所；

【摘要】 对喷射器、涡流管和膨胀机在CO2跨临界循环内的工作原理进行了分析,又从热力学的角度对系统高压、气体冷却器的出口温度和蒸发温度对三种不同节流装置循环的影响进行了分析。分析结果表明带膨胀机的CO2跨临界循环具有相对较高的COP和制冷量,并且对两相流和变工况适应性较强,与其它两种循环相比,其综合性能较好。更多还原

【Abstract】 The paper analyzed the operating principles of ejector, vortex and expander that run in the carbon dioxide transcritical cycle. And the effects of system high-pressure, outlet temperature of gas-cooler and evaporating temperature on different carbon dioxide transcritical cycle systems were studied by means of thermal dynamics. The results studied indicated that the transcritical carbon dioxide cycle with expander is with better combination property, because the cycle with expander has higher COP and bigger refrigerating capacity than other cycle with vortex or ejector, and suit two phase flows and variable working conditions well.更多还原