ISSN Online: 2377-424X
ISBN Print: 978-1-56700-474-8
ISBN Online: 978-1-56700-473-1
International Heat Transfer Conference 16
STUDY ON HEAT AND MASS TRANSFER CHARACTERISTICS OF PROTON EXCHANGE MEMBRANE (PEM) FUEL CELL BASED ON WATER EVAPORATION EFFECT IN MEMBRANE
要約
Proton exchange membrane (PEM) fuel cell is a kind of device that converts the chemical energy of the fuel directly into the electrical energy and widely used in industry and transportation. The water and thermal management of PEM fuel cell have major impact on the performance of the cell and the suitable moisture content in proton exchange membranes is one of the most important factors to the PEM fuel cell systems performance. In this paper, the effect to different vaporization mechanism of water in the membrane are investigated numerically, the results show that the temperature of the fuel cell increases with lessens of the heat transfer coefficient, and the average temperature locates in membrane is reduce most significantly by 18.03% compared to no vaporization condition in membrane for cases which heat transfer coefficient is 50W/(m2K). Furthermore, the current density with evaporation in membrane is much lower than take no account of vaporization especially on the cathode side; meanwhile, the excess percentage of oxygen and water vapor concentration is significantly different from the condition without vaporization when the fuel cell temperature reaches the boiling point.