一次回风送风再热与新风预冷互补的节能研究

Energy saving of complementary of primary return air supply reheat and outdoor air precooling

对于一次回风空调系统,夏季工况,当空调区湿负荷较大时,采用露点送风只能保证设定温度,而湿度将会偏大,影响人体热舒适;若增加再热,又会出现冷热抵消现象。提出了利用室外新风热量再热来改善室内热舒适状况的方案。通过工程案例计算分析,结果表明:利用新风再热可减少再热送风系统6%~15%的能耗,认为送风再热与新风预冷互补措施能在一定程度上降低空调能耗,提高室内热舒适。

For the primary return air conditioning system, in summer condition, when the humidity load in the air conditioning area is large, the dew-point air supply can only ensure the set temperature, and cause the high humidity, affecting the thermal comfort of the human body. Increasing the reheat will lead to the cold and heat offset phenomenon. Puts forward a scheme to improve indoor thermal comfort by reheating the outdoor air. The results show that the energy consumption of reheated air supply system can be reduced by 6% to 15% using outdoor air reheat. Thinks that the complementary measures of air supply reheat and outdoor air precooling can reduce the energy consumption of air conditioning to a certain extent and improve the indoor thermal comfort.