A new dehumidification design method of primary return air-conditioning system

This paper introduces a new method of dehumidification design for primary return air conditioning system. Many buildings with traditional dehumidification design often can not satisfied practical dehumidifying demand, especially those with little excess heat in transition season. After it analyzed the cause of reheat being on the low side in the primary return air handling process, it points out that the worst condition to calculate reheat is not in summer, but in transition season. Then the paper puts forwards the method to calculate the reheat in those worst conditions. At last it discusses the. feasibility of utilizing condensing heat as reheat source, and compares three kinds of equipments which applied condensing heat to reheat. Results display that dehumidifying air-conditioner will be predominant to dehumidifing and air-conditioning also.