Impact of room design relative humidity on air conditioning system economy—Concurrent comments on Discussion on a viewpoint in Identification of air conditioning energy conservation techn

Points out the problems existed in the related document. The calculation results of engineering examples show that increasing design relative humidity in central air conditioning system with primary return air, common office rooms will consume more energy, but in offices or shopping malls with larger number of occupants and larger fresh air rate energy consumption will decrease slightly. The relative humidity of rooms using conventional air conditioning system with fan coil units and fresh air can not be set ad lib. When using DOAS with dry coil as sensible cooling equipment, the rooms with different functions have different variety rules of design relative humidity and initial investment. However, no matter what kind of air conditioning systems, reducing indoor relative humidity will decrease initial investment of air conditioning systems. The comfort air conditioning and the industrial air conditioning must be differentiated when studies the impact of design relative humidity on air conditioning system economy.