Research on Design and Operation Methods of Radiant Panel with Fresh Air System

Compared with traditional air-conditioning systems which aim at maintaining the designed indoor air temperature and humidity, radiant panels are capable to improve the human thermal comfort through the direct radiant heat transfer with occupants. Based on the Fanger's thermal comfort model, the simplified PMV (Predicted Mean Vote) model and calculation equation of cooling load are established. This paper analyzes the relationship between the human thermal comfort and indoor sensible cooling load, and explores the design and operation methods of indoor parameters. The model room with typical boundary conditions in the hot-summer and cold-winter zone of China is simulated and analyzed by Airpak. The widely accepted PMV and PPD (Predicted Percentage of Dissatisfied) indices are adopted to evaluate the indoor human thermal comfort. The parameters including the radiant surface temperature, the air supply temperature, the relative humidity and the ratio of the radiant surface areas are researched. The optimum indoor parameters in typical summer conditions are finally obtained, it is expected to provide a relevant reference for the design and operation methods subject to the radiant panel combined with fresh air system.