Thermal performance of precast light floor radiant panel

Precast light floor radiant panel is an integrated sheet which consists of insulating base board, heating plastic tube, thick aluminum foil and surface course. The heating tube is laid in the groove of insulation board under aluminum foil. The radiant panel is simplified as a two-dimensional heat transfer model for analysis. The numerical simulation is carried out to obtain the thermal performance. Experiments are conducted to verify the simulation. The average temperature of the inner wall of the heating tube and the surface of the aluminum foil under steady state was measured, and the thermal resistance under the experimental conditions was obtained. Comparisons between the experimental results and the simulation results indicate that the simulation is valid. The effects of different tube spacing and thickness of aluminum foil on the surface temperature and the equivalent thermal resistance of the radiant panel is studied by simulations. The results show that the distance between heating tubes has obvious effect on the equivalent thermal resistance, while the thickness of aluminum foil has insignificant influence on the thermal performance of the heating panel in question.