The Contact Surface Model between Fin and Tube of Solar Collector in Solar Water Heater

摘要

In this study was the solar collector testing for bond conductance (Cb) and the thermal efficiency of solar collector includingtypes of materials and contact surface model of fin and tube of thermal collector. The experiment of solar collector was testedby the single tube on the collector and there were three types of fins consist of small zinc fin, large zinc fin and aluminum fin.The experimental conditions were tested and calculated the average Cb between fin and tube of each type collector (small zincfin, large zinc fin and aluminum fin) that were performed 8.40, 5.31 and 9.60 W/m.°C, respectively. The average thermalefficiency of solar collector was shown that the small zinc fin of solar collector was highest as 0.93, the aluminum fin of 0.77and the large zinc fin of 0.76. On the reverse side of the solar collector, the thermal efficiency was slightly changed based onthe original solar collector. The small zinc fin of solar collector was an easy to find on local material, cheap and do it yourself(DIY). Also, the small zinc fin of solar collector had the potential to be a part of component in a solar water heater.