中央空调系统的节能措施——二次回风系统的应用

目前恒温恒湿中央空调工程普遍采用一次回风系统，如改用二次回风系统，将可以节省加热器的加热量及与加热量相同数量的制冷量，因此采用二次回风系统有显著的节能效果。工程实例建成投入运行后的运行结果也得到证明。

Energy-saving Measures of Central Air Conditioning System -Applications of Secondary Return Air System

At present , the constant temperature＆humidity central air -conditioning system general adopt the pri-mary return air system .If adopt the secondary return air system instead , the heating capacity of the heater and equal cooling capacity can be saved .Therefore, adopt the secondary return air system , the energy saving effect will be ver-y remarkable .After this kind of the central air -conditioning system is put into operation , the energy saving effect is also proved.Projects completed and put into operation also proved this .