Experimental Investigation on Radiant Ceiling Cooling Integrated with Underfloor Ventilation System: The Effects of Disturbance Variables and Manipulated Variables on Controlled Variables

摘要

In this paper, the effects of comprehensive outdoor air temperature, indoor heat quantity, average water temperature, and supply air temperature on indoor air temperature and operative temperature of radiant ceiling cooling integrated with ventilation system (RCCUV) were investigated by experiments. The objective of this study is to research the effects of disturbance variables and manipulated variables on controlled variables of the system, which would provide the basis for control strategy and operation optimization. The results illustrated that indoor air temperature (IAT) and operative temperature (OT) increased with the increase of the disturbance variables and manipulated variables. The increase ratio of IAT and OT were relatively slow when comprehensive outdoor air temperature was relatively low or high and indoor heat quantity or average water temperature was relatively low. IAT and OT increased approximately linearly with the increase of supply air temperature.