| Summary: | 碩士 === 淡江大學 === 化學工程與材料工程學系碩士班 === 97 === A new design of the solar air gap membrane distillation (Solar AGMD) system is investigated theoretically and experimentally. The theoretical formulations are also developed and the resultant equations are solved by the Newton-Raphson method. The effects of the fluid inlet temperature, volumetric flow rate, air gap thickness and incident solar radiation on the heat transfer efficiency and the productivity of pure water are discussed in this study. The theoretical results indicate that the pure water productivity increases with increasing the inlet temperature of hot fluid, volumetric flow rate and incident solar radiation. Moreover, the best thermal efficiency of the solar AGMD system was obtained as the air gap thickness is 2.5 mm. A comparison of the traditional air gap membrane distillation system (AGMD) and the new solar AGMD system on the pure water productivity are also made. The results show that the solar AGMD system does the better performance than the traditional AGMD system. The experiments of the AGMD and solar AGMD systems are set up to confirm the accuracy of the theoretical predictions. The good agreement is achieved between the theoretical results and the experimental runs in the present study.
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