A comparison of indoor humidity behaviors: all-air and chilled-ceiling with dessicant cooling

A building energy similation code (ACCURACY) was used to compare indoor humidity in an office room in a hot and humid climate (Hong Kong weather condiitons) equipped either with a conventional constant volume all air system or with a chilled ceiling and a dessicant cooling system. The chilled ceiling and dessicant cooling provide better indoor humidity environment most of the time. The paper gives indications on how to avoid condensation on ceiling panels.