| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 93 === In recent years, the fuel cell has been used widely in many fields such as battery, power plant, the power of motors . Because of the academic research difference, the mathematical model of fuel cell has been developed gently. Most of the research are based on non-linear parial differential equation for studying the inner mechanizer of fuel cell and the flow field design and we could realize simply and deeply about the inner transfer phenomena (mass transfer, heat transfer and the elechemistry reaction behavior of a fuel cell )by a rigorous mathematical model. But the bulk calculating costs and the verbose results cause the difficulty of the dynamic analysis. Not only using the fast and efficiency mathematical method but also the over-simply and realizable math mode to support the studying of the system integration & the problem of control system design.Here,we will take the mathematical eauations from the previous papers.We will not only try to realize some operating problems of the fuel cell stack from macroscopic view base on semi-emperical & empirical equations,but also offering some good suggestions to the stack design via the system dynamic simulations.Oxygen starvation phenomena will seriously damage the polymer membrane of the system.In this paper,we will focus on how to prevent the oxygen starvation occurs by designing the control structure.We hope the serious phenomena would not happen in our system by developing efficiency control structure.
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