间接蒸发冷却-喷射制冷一次回风空调系统分析

本文提出一种以干空气能与低品位能源联合驱动的间接蒸发冷却-喷射制冷一次回风空调系统,介绍系统工作原理及流程,建立系统数学模型,并分析一次回风空调系统(间接蒸发冷却—喷射制冷)主要性能随新风比从0.2到1的变化情况,当新风比逐渐减小时,蒸发器空气侧进口温度、工作流体、引射流体质量流量均逐渐减小,制冷剂的蒸发温度和引射流体与新风质量流量比均逐渐增大。在满足相同室内空调冷负荷需求时,一次回风空调系统(新风比0.2)跟直流式空调系统相比,总制冷量可减少59.3%,耗电量可节省52.7%,具有相当大的节能效益,值得进一步实验研究。

Analysis of an indirect evaporative cooling-ejector refrigeration primary return air conditioning system

An ovel indirect evaporative cooling-ejector refrigeration primary return air conditioning system driven by dry air energy and low grade energy was proposed.Working principle and process of the proposed system were illustrated and mathematical models of the proposed system were established.Main performances of the primary return air conditioning system(indirect evaporative cooling-ejector refrigeration)were analyzed with the fresh air ratio range from 0.2 to 1.When fresh air ratio reduced gradually,inlet temperature of the air side and the mass flow rate of the primary vapor and the secondary vapor all decreases gradually in the evaporator,but the evaporation temperature of refrigerant and the mass flow ratio of the secondary vapor to fresh air increases gradually.Compared with direct flow air conditioning system,the primary return air conditioning system(fresh air ratio 0.2)could reduce the refrigerating capacity by 59.3%and save electricity consumption by 52.7%when meet the same indoor cooling cold load demand.The proposed system has great energy saving benefits and it is worth further experimental study.