【摘要】 针对传统空调系统热湿耦合处理所带来的问题,提出一种两级压缩双温空调系统。该空调系统主要由2个压缩机、2个蒸发器(高温蒸发器和低温蒸发器)、冷凝器和2个电子膨胀阀构成。通过Simulink软件建立该空调系统的稳态数学仿真模型,并对换热器和压缩机的数学模型进行验证。分析高、低温蒸发器的换热面积比(RA)对该空调系统性能系数(COP)的影响,计算该空调系统在不同室外气候条件下的COP和节能潜力。研究结果表明:当2个蒸发器总换热面积一定时,随着RA增大,该空调系统的COP先增大后减小,且随着室外空气的温度或相对湿度降低,该空调系统的COP逐渐增大,最高可达6.32;在制冷工况下,两级压缩双温空调系统比带新风的传统空调系统节能12.60%～30.97%,整个供冷季节的空调能耗可减少16.74%。更多还原

【Abstract】 Aiming at the problems caused by the heat and moisture coupling processing of traditional air conditioning systems, an innovative two-stage dual-temperature air conditioning system was proposed. The new air-conditioner was comprised of two compressors, two evaporators(high temperature evaporator and low temperature evaporator), a condenser and two throttles. Mathematical model of the proposed air conditioning system was established using Simulink software, and the models of heat exchanger and compressor were validated. The influences of the heat exchange area ratio(RA) of high temperature evaporator and low temperature evaporator on the coefficient of performance(COP) of the air conditioning system were analyzed, and COPand energy saving potential of the proposed air conditioning system were calculated. The results show that COP increases first and then decreases in the conditions of fixed total area of the two evaporators when RAincreases.Moreover, when the outdoor air temperature or relative humidity reduces, COPincreases gradually, and the maximum COPis 6.32. Compared to the conventional air conditioning system with fresh air, the energy saving potential of two-stage compression dual-temperature air conditioning system is from 12.60% to 30.97% in cooling conditions and reaches 16.74% during the whole cooling season.更多还原