Dynamic Behaviors and Optimal Operation of Proton Exchange Membrane Fuel Cells

• Main Authors: Yi-Shiung Chiou, 邱義雄
• Other Authors: Yi-Shyong Chou
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/72bj38

博士 === 國立臺灣科技大學 === 化學工程系 === 102 === This research will focus on proton exchange membrane fuel cells. In the first part, study focused on the establishment of two-dimensional non-isothermal, vapor-liquid mixed phase flow and instantaneous dynamic proton exchange membrane fuel cell mathematical model that include anode and cathode channel monentum, continuity, species , energy and water in the polymer film transfer equations. The results observed by simulating fuel cell water and heat transport mechanism instantaneous and explore the fuel cell operating parameters on cell performance. where operating parameters include the gas flow rate, pressure, temperature, humidity and current. Due to redox and gas flow rate are rapid of the proton exchange membrane, hence the process of instant change is sticking point. The results did show the operating parameters of instant process of the fuel cell is an important role. In the second part focuses on proton exchange membrane fuel cell water management, This operations of the fuel cells is also a important porject. Especially for the acid polymer fuel cell, which has a relationship with water conductivity. Although commercial computing modules have been widely used to simulate the complex dynamics of two-dimensional fuel cell, it can easily obtain complex dynamics results, but by using the MATLAB matrix parallel computing and orthogonal collocation method also can obtain the two-dimensional and two-phase flow simulation of dynamic fuel cells and easier adjustment formula internal values has been reached effective convergence time. In third part is used validated dynamic model for optimal operating conditions. The operating parameters include current, inlet temperature, inlet humidity of anode and cathode and pressure. In this research work is mainly on the selected specific object function and use genetic algorithms for optimal operation to obtain optimal operaing conditions.