The Design and Performance of a PEFC at a Temperature Below Freezing(<Special Issue>International Conferences on Power and Energy System)

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概要

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• At temperatures below freezing, air humidity becomes lower and produced water at the cathode freezes on the surface of catalyst, and it is difficult to start a PEFC (Polymer Electrolyte Fuel Cell) at a cold district. The object of the work is to study the performance of the fuel cell below the freezing point by experiments and simulation. To investigate the characteristics of the starting of a temperature below freezing the performance of a single cell was measured at temperatures from -3 to -25℃ and pressures from 1 to 2 atm. The results of the experiments and simulation indicate that the performance of a PEFC decreases at higher current densities and pressures, and lower cell temperatures because of ice more produced on the reactive area of the cathode. To maintain the cell performance below freezing point, it is effective to adjust the current densities and gas flow rate to balance the produced and removed water. However at -5℃, heat generated in the fuel cell is effective to warm the cell and make self-starting possible. These results shows that it is necessary to heat the cell with an additional heat source in order to start the fuel cell below -5℃.

• 一般社団法人日本機械学会の論文
• 2004-05-15

著者

• OGAWA Tomohiro

  Department of Hepatology, Osaka City University Graduate School of Medicine

• Ogawa T

  Department Of Mechanical Engineering Hokkaido University

• Ogawa Tomohiro

  Department Of Hepatology Osaka City University Graduate School Of Medicine

• CHIKAHISA Takemi

  Department of Mechanical Engineering, Hokkaido University

• HISHINUMA Yukio

  Department of Mechanical Engineering, Hokkaido University

• KAGAMI Fumio

  Department of Mechanical Science, Hokkaido University

• Chikahisa T

  Department Of Mechanical Engineering Hokkaido University

• Hishinuma Yukio

  Department Of Mechanical Engineering Hokkaido University

• Kagami Fumio

  Department Of Mechanical Science Hokkaido University

• Ogawa Tomohiro

  Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan

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