Discussion on design parameters of nominal working condition in dry-hot climatic zone

Taking Urumqi, Yinchuan and Lanzhou as examples, researches the characteristics of meteorological parameters in the dry-hot climatic zone of northwestern China. Calculates the summer humidity load of public buildings in Urumqi and analyses its characteristics. Finds that using different outdoor air design parameters will lead to different air handling modes and adopting the design parameter without considering the local climatic characteristics will lead to inappropriate technical solution. Analyses the influences of the chilled water and cooling water temperatures of water-cooled chillers and the water side and air side parameters of air handling equipment on air conditioning systems. Suggests the outdoor air design parameters suited for the dry-hot climatic zone and the nominal conditions for water-cooled chillers, air handling units and fan-coil units.