摘要
提出一种新型双温热源喷射式制冷系统,该系统由第1喷射器和第2喷射器共同驱动,有效利用第2喷射器的增压作用提高第1喷射器引射蒸汽的压力,提高了系统总压比。与传统单喷射制冷系统相比,该系统在相同的冷凝温度下,蒸发器中能获得更低的制冷温度。建立了组成系统部件热力学数学模型,分析了中间压力、压比分配率、冷凝温度、蒸发温度和发生温度对该系统工作特性影响。研究表明:相同工况下,新系统的制冷温度比传统单喷射系统制冷温度可降低10～15℃。
The novel dual-temperature ejector refrigeration cycle(DERC) was developed.The cycle was driven by the first ejector and the second ejector,and the overall pressure ratio of the cycle was improved by the pressuring of the second ejector which increases the pressure of secondary fluid of the first ejector.Compared with the traditional single ejector refrigeration cycle,the novel cycle can obtain lower refrigeration temperature in the evaporator at the same temperature of condenser.Based on the thermodynamic models on components,the influences of intermediate pressure,pressure ratio distribution rate,condensing temperature,evaporating temperature,and generating temperature on the characteristics of the novel DERC were analyzed.The research results indicate that the novel cycle can obtain 10～15 ℃ lower refrigeration temperature in comparison with the traditional cycle.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2012年第6期40-44,7,共5页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(50906021)
关键词
喷射器
双温热源
制冷温度
性能系数
Ejector
Dual-temperature heat source
Refrigeration temperature
Coefficient of performance
