Dynamic Optimization Design on Heat-Integration of Solar Heated Membrane Distillation and Fuel Cell for Desalination System
| Autor: | Yu-Hsin Liu, 劉育芯 |
|---|---|
| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 Direct Contact Membrane Distillation (DCMD) system mostly uses the solar collector to convert solar radiant heat into the main thermal source as reported in the past literatures. Due to unstable supply of solar radiation, the heat integration feasibility of Proton Exchange Membrane Fuel Cell (PEMFC) coupled with solar heated DCMD module is evaluated in this study. The additional waste heat from PEMFC is coupled into the original configuration to increase the DCMD system’s operability to produce fresh water and, at the same time, electricity. Besides, the operating temperature of PEMFC is usually set between 60 °C and 90 °C, which exactly satisfies the inlet temperature requirement of feed flow in DCMD system. MATLAB/Simulink platform is used to build the mathematical model of each unit operation. Two systems units to be evaluated mainly include a flat plate solar collector, a heat storage tank with internal heat exchanger, the DCMD module, without and with the PEMFC module, respectively. The accuracy of the models is then verified with the experimental data from the literatures. To simulate realistic operation condition, typical environmental data of Taichung is adopted from the literature. The importance of daily operation continuity is emphasized through a dynamic preliminary simulation and proper sizing of the solar heated DCMD distillation. Therefore, the two systems should be optimized and sensitivity analysis is deemed necessary to analyze the relationship between the important variables and the daily fresh water production. The optimal design variables of both configurations are determined in term of minimum Unit Production Cost (UPC) to evaluate the proposed heat integration feasibility and to obtain key insights on the design strategy of DCMD systems. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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