EXPERIMENTAL AND NUMERICIAL INVESTIGATION OF CEILING MOUNTED RADIANT PANELS HEAT OUTPUT FOR DIFFERENT INLET-OUTET WATER TEMPERATURES
The heat output of ceiling mounted radiant panels with dimensions of 1.5m x 1.9m x 0.052m were investigated for inlet-outlet temperatures of 50/30°C, 60/40°C, 70/50°C, 80/60°C and 90/70°C in a temperature controlled space. The experimental results were compared with results of an accredited laboratory, and a fair agreement was obtained. In addition, computational investigations for the radiant panel with the same dimensions were performed, in a space heated with radiant heater with constant surface temperatures in the range of 40°C – 150°C. It was observed that the numerical results are in agreement with the experimental values. The numerical results showed that, radiation as well as natural convection heat transfer mechanisms occur, and the portion of radiation heat transfer is at a rate of approximately 80%. The heat output increases almost linearly with the increase of temperature.
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