太阳能喷射制冷系统的热经济性能分析  

THERMO-ECONOMIC PERFORMANCE ANALYSIS OF SOLAR EJECTOR REFRIGERATION SYSTEM

作　　者：周游 王菲 

机构地区：[1]中国矿业大学力学与土木工程学院,徐州221116 [2]江苏建筑节能与建造技术协同创新中心,徐州221116

出　　处：《太阳能学报》2017年第12期3244-3250,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金青年项目(51406228);江苏省自然科学基金(BK2011216)

摘　　要：基于热力学第一定律和热经济学理论对以R123、R134a、R717、R236fa和R600a为制冷剂的太阳能喷射制冷系统的蒸发温度、冷凝温度和发生温度进行热经济性能优化。提出一个系统总投资成本的目标优化模型。以热经济指数(单位制冷量所需的总费用)为系统热经济性能评价指标,计算并讨论在不同的质量流速条件下,不同制冷剂热经济指数的大小及其随工况的变化。研究结果表明:制冷剂R717的热经济指数最低,即其热经济性能最优,制冷剂的热经济指数均随制冷剂质量流速的增加而增加。对于不同的制冷剂,最优温度的变化范围不大,最优蒸发温度为8~10℃,最优冷凝温度为33~34℃。发生温度越低,系统的热经济性越好。The thermo-economic performance optimization on the evaporation temperature, condensation temperature and generation temperature of solar ejector refrigeration system with R 123, R134a, R717, R236fa and R600a as refrigerant was carried out based on the first law of thermodynamics and thermo-economic theory. A goal optimization model of total investment cost of ejector refrigeration system was proposed. Taking the thermo-economic index which is the total cost in per refrigeration capacity as the thermo-economic evaluation indicator, the value and the change of thermo-economic index with various refrigerants in different mass flow speeds and different operating conditions were calculated and discussed. The results indicate that thermo-economic index of refrigerant R717 is the lowest, that means it has the best thermo-economic performance. The thermo-economic index increases with the higher mass flow speed. The optimal temperature changes little with various refrigerants. The optimal evaporation temperature is 8-10 ℃, the optimal condensation temperature is 33-34 ℃. The thermo-economic performance is better as the generation temperature getting lower.

关 键 词：喷射制冷 热经济性能 制冷剂 工况优化 

分 类 号：TB61[一般工业技术—制冷工程]