Dynamic variation of surface temperatures on the radiant ceiling cooling panel based on the different supply water temperature adjustments

Abstract Radiant ceiling cooling panels has been easily integrated with air system to reduce the building energy consumption, yet their surface is prone to condensation, restricting the application of such systems in hot and humid climate. In order to prevent surface condensation of the radiant ceiling panels, the dynamic temperature changes of radiant ceiling panel surface must be fully understood. In this paper, experiments are used to investigate radiant ceiling panel surface temperature changes. Experimental results are used to perform numerical simulations and a SAS (Statistical Analysis System) program via linear regression method, in order to study the effect of supply water temperature adjustments on the dynamic temperature changes of radiant ceiling panel surface. Results show that radiant ceiling panel surface temperatures change exponentially with water supply temperature changes when there is a danger of condensation on the radiant panel surface. When the water supply temperature rises, the surface temperature of the radiant ceiling panel increases, effectively preventing surface condensation occurrence and the variation of the supply water temperature has the greatest influence on the surface temperature of the radiant ceiling panel. When the supply water temperature is lowered, the indoor temperature has the greatest influence on the surface temperature of the radiant ceiling panel.