Air handling method and energy efficiency of a heat recovery type air conditioning unit using refrigerant sub-cooling heat

Li Da, Tian Yanfa, Qin Qiang and Guo Guixia

2020.02.17

 Presents a new type of air handling unit, which reheats dew-point temperature air in summer and preheats outdoor air in winter using refrigerant sub-cooling energy of heat pump, and recovers the waste heat of exhaust air by the heat pump. Comprehensively analyses the unit constitution, heat pump working principle, air conditioning process and technical characteristics of the heat recovery air conditioning unit. With an engineering example, analyses and calculates the energy efficiency. The results show that the performance of the air conditioning unit is improved by 11.4% and 26.1% in summer and winter, respectively, with the significant energy saving effect.