博士 / 淡江大學 / 化學工程與材料工程學系博士班 / 98 / The solar heat assisted membrane seawater desalination system is technically and economically feasible, which is constructed of solar collectors and membrane distillation device for energy saving water purification. The diving force of separation in membrane distillation device is supplied by infinite resources of solar radiation. Solar desalination systems are classified into two categories, i.e. direct and indirect collector systems. There are some advantages for the direct indirect solar heat driven systems (1) the direct solar heat system integrates the solar absorber as an additional heat supply source and membrane distillation process into a small-scale unit which uses the solar radiation as the heat source to produce high purity water; (2) the hot brine is indirectly preheated by the solar heating system to prevent equipment fouling and the maintenance costs of solar collectors and hot water storages are low, respectively. The purposes of this study are (1) to study new design of ultra-thin channel solar water heater, direct contact membrane distillation, dual films membrane distillation, immediate solar assisted membrane distillation systems with mathematical modeling and experimental studies; (2) to develop a two-dimensional mathematical model and propose a general numerical method for solving this complex mathematical model in predicting pure water productivity of membrane distillation systems; (3) to study the collector efficiency improvement of solar collector and the effect of temperature distributions, temperature polarization and pure water productivity improvement on the membrane distillation systems. The results show that the agreement between the experimental results and theoretical prediction are fairly good.
| Identifer | oai:union.ndltd.org:TW/098TKU05063004 |
| Date | January 2010 |
| Creators | Tsung-Ching Chen, 陳宗慶 |
| Contributors | Chii-Dong Ho, 何啟東 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 157 |
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