碩士 / 淡江大學 / 化學工程與材料工程學系碩士班 / 97 / Membrane distillation is a feasible technology for desalination by utilizing the vapor pressure difference across a hydrophobic membrane via temperature driving force. The integration of the low-temperature solar thermal energy with the membrane distillation provides a way to simultaneously solving the energy and water resource problems. The thesis investigates the dynamics and control of the solar powered membrane distillation desalination systems. A system simulation model is built on Aspen Custom Modeler platform, including models for solar collector, thermal storage tank, heat exchanger and membrane distillation module. The model is then used for the dynamic optimization and control system design under different solar radiation conditions.
The optimization study reveals that simple thermal storage tank configuration is better than other complex configurations. Besides, the operation using lower flow rate in the membrane distillation module helps the freshwater production but sacrifices the thermal energy absorption. Appropriate controller set points and PI controller tunings can benefit the system performance.
| Identifer | oai:union.ndltd.org:TW/097TKU05063028 |
| Date | January 2009 |
| Creators | Chien-Chang Li, 李建璋 |
| Contributors | Hsuan Chang, 張煖 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 142 |
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