HFC134a在太阳能喷射制冷系统中的性能分析

Performance analysis on solar ejector refrigerant system with HFC134a

建立了系统热力学性能计算模型,分析了HFC134 a喷射系统的蒸发温度、喷嘴效率等参数对系统性能的影响。研究表明,冷凝温度改变对系统性能和喷射系数的影响大于蒸发温度的影响;混合效率每减小1%,系统COP减小5%左右;系统COP随蒸发温度的增而增,随冷凝温度的增而减。HFC134 a喷射系统设计时,尽量使蒸发温度在4—12℃,冷凝温度在30—36℃之间变化,该研究为HFC134 a在喷射系统中的设计和优化提供了技术支持。

Establish a simulation program of the solar ejection system performance. The influence of evaporation temperature, and condensing temperature on the system performance has been analyzed. It is found that the influence of condenser temperature on the COP and entrainment ratio is more than the evaporation temperature. The COP of system will decrease 5 percent with mixing efficiency decreasing I percent, and the COP of ejector system increases with the increasing of evaporation temperature and decreases with the increasing of condensing temperature. When design the HFCI34a ejection system, we should make the evaporation temperature from 4 to 12℃ and condensing temperature from 30 to 36℃. The research can provide the academic reference for design and optimization of the solar ejector refrigerant system.