- 期刊
Dynamic Simulation and Control Strategy Development for Safe and Fast Start-up on Solid Oxide Fuel Cell
固態氧化物燃料電池之起機模式動態模擬與控制
摘要
固態氧化物燃料電池需在溫度高達800oC條件下運轉，為能在安全且快速條件下達到運轉溫度，本文建立該電池模型並探討其動態特性，以建立最適化之溫升策略。在溫升過程中，應用調節陰陽極入口流量、溫度、與反應電流，做為控制電池溫升之參數，以確保溫升率在容許範圍內。本模型包含質量平衡、能量平衡、與電化學反應，在MATLAB/Simulink環境下，採用Fuzzy sliding控制理論，進行起機程序模擬，並針對固定入口溫度與變動入口溫度兩種條件進行驗證與探討。模擬結果顯示，變動入口溫度模式具有較短溫升時間之優勢。
關鍵字
無資料並列摘要
An elevated temperature is required for solid oxide fuel cell (SOFC) which operates at high temperature (approximate 800°C). This paper addresses the dynamic characteristics of solid oxide fuel cell with an emphasis on control strategy development for optimized process of start-up. A methodology on regulating inlet flow rate, temperature and current rate is investigated to make sure the increment rate of stact temperature is allowed for safe and fast start-up. An integrated dynamic model for a planar solid oxide fuel cell composed of mass balance, temperature dynamics and electrochemical reaction works together with fuzzy sliding mode controller in MATLAB/Simulink to simulate the dynamic characteristic of start-up process in the paper. Two strategies based on fixed and variable inlet temperature difference respectively are proposed and disscused. Simulation results show the variable inlet temperature difference strategy can reduce the duration for safe start-up compared with the fixed inlet temperature difference strategy.