跨临界二氧化碳蒸汽压缩／喷射循环的热力学分析  

Thermodynamics Analysis of the Trans-critical Carbon Dioxide System with an Ejector

作　　者：李涛[1] 李强[1] 阚杰[1] 郝亮[1] 袁秀玲[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《制冷空调与电力机械》2006年第2期3-6,共4页Refrigeration Air Conditioning & Electric Power Machinery

摘　　要：利用热力学第二定律的(火用)分析法,对跨临界二氧化碳蒸汽压缩／喷射制冷循环系统进行了仿真和分析。结果表明,放热压力存在最优值,升高气体冷却器出口温度和蒸发温度会降低系统火用效率;相对于简化循环,降低放热压力和蒸发温度能够增大系统火用效率的提高程度,而升高气体冷却器出口温度时,系统火用效率的提高程度将先增大,然后迅速减小。The exergy analysis of the trans-critical carbon dioxide system with an ejector was carried out in this paper. The results show that there is an optimum heat rejection pressure, the lower heat rejection pressure can enhance the improvement of exergetic efficiency comparing with the conventional cycle;The higher gas cooler outlet temperature will reduce the exergetic efficiency,the improvement of exergetic efficiency will be increased at first,and then reduced rapidly comparing with the conventional cycle;The higher evaporating temperature can reduce the exergetic efficiency,and reduce the improvement of the exergetic efficiency comparing with the conventional cycle.

关 键 词：二氧化碳 跨临界 喷射 吸引流 驱动流 (火用) 

分 类 号：TB611[一般工业技术—制冷工程]