| Summary: | 碩士 === 國立勤益科技大學 === 冷凍空調系 === 100 === The study uses a solar parabolic concentrator to focus solar rays on the axial linear focus of its tubular absorber. The way can concentrate solar heat to produce higher temperature of hot water for the usage of a solar cooling or heating system.
A configuration of the solar concentrator involves a solar reflector with energy concentration ratio 10, a 93% reflection efficiency of aluminum reflective surface designed by Trace pro optical simulation software, an vacuum tube as a tubular absorber, an working fluid water inside the vacuum tube, and a 2-D sun tracking system.
The research finds that the efficiency of a solar concentrator has a direct relation with sky diffuse radiation ratio. The efficiency of the solar concentrator can increase 3 % with decreasing sky diffuse radiation ratio 10 %. Three years of sky diffuse radiation ratio data measured by the study shows that the monthly average diffuse radiation ratio in central Taiwan is between 20 % and 40 %. It reveals that a solar concentrator can be suitably developed in central Taiwan.
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