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本文将温湿度独立控制技术应用于CO2双温压缩/喷射空调系统，建立热力学模型对空调系统降温除湿过程进行理论计算，研究了双温蒸发器制冷负荷比对系统引射比和能效比的影响，并与常规双温空调系统进行性能比较分析。结果表明：在设计工况下，CO2双温压缩/喷射空调系统总制冷量5.837 kW，系统除湿量1.99 kg/h，系统能效比达到4.08；随着制冷负荷比的增加，系统的引射比减小，能效比提高。在制冷负荷比为5时，系统引射比为0.127，系统能效比可达到5.324；相比常规双温空调，在低温蒸发温度5～15℃范围内，系统能效比提高27.2%～31.12%。在设计工况下，系统能效比可提升28.91%。
Abstract：In this paper,the temperature and humidity independent control technology is applied to CO2 dualevaporator compression/ejection air conditioning system.A thermodynamic model is developed to investigate performance of the air conditioning system in cooling and dehumidification.The influence of cooling capacity ratio on the entrainment ratio and energy efficiency of the system is studied,and a comparative study of the air conditioning system with a conventional dual-evaporator air conditioning system is conducted in terms of energy efficiency.The results show that under the design condition,the total cooling capacity of CO2 dual-evaporator compression/ejection air conditioning system is 5.837 kW,the dehumidification capacity is 1.99 kg/h,and energy efficiency ratio can reach 4.08.With the increase of cooling capacity ratio,entrainment ratio of the system decreases and energy efficiency increases.When cooling capacity ratio is 5,the entrainment ratio is 0.127,and energy efficiency ratio can reach 5.324.Compared with conventional dual-evaporator air conditioning,energy efficiency ratio of the system is increased by 27.2%-31.12%when low temperature evaporation temperature is in the range of5-15℃.Under the design condition,energy efficiency ratio can be improved by 28.91%.
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基本信息:
中图分类号:TB657.2
引用信息:
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