| Summary: | 碩士 === 遠東科技大學 === 電腦應用工程研究所 === 102 === The study was mainly aimed at the performance of solar collectors using the software packages (Fluent) to simulate and analyze the flow and heat transfer characteristics. The solar collectors were further innovated and invented in the ingenuity, in order to significantly enhance the performances of solar water heater.
For this study, an "all-glass vacuum tube solar collector" was simulated by a three-dimensional model to solve and analyze the thermal and flowing fields. The collector was then obtained a various designs in the inventions and innovations, in the direction of inventions and innovations: "the replacement of entrances and exits", "the elliptic conduit placed inside a vacuum tube " and " the elliptic conduit and vacuum tube are elliptic section", etc. The data obtained in the simulation is analyzed and used as a reference, according to the results of this study the most suitable design of the conduit tube will be selected.
The results of the analysis show that the thermal efficiency is the best when the both the vacuum tube and conduit tube are elliptic and when the following parameters is more obvious from a higher radiation (700W / m²) and a length of conduit 1100mm. The sort of best thermal efficiency is 1.1m> 0.9m> 0.6m> 0.3m> replace the position of entrance> the original collector. The results show that the efficiency of the present collector is the best and can enhance collector thermal collecting performance when it is compared with the original collector.
Keywords: all-glass vacuum tube collectors, solar collectors.
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