Performance Effects of Proton Exchange Membrane Fuel Cell with Hydrogen/Oxygen Feed At Different Load Resistance and Gas Feeding Conditions

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Kellegöz M.

Balkan Physics Letters, pp.273-278, 2008 (Peer-Reviewed Journal)

  • Publication Type: Article / Article
  • Publication Date: 2008
  • Journal Name: Balkan Physics Letters
  • Page Numbers: pp.273-278
  • Eskisehir Osmangazi University Affiliated: Yes


Proton exchange membrane fuel cell which is an energy conversion technology is an electro-chemical device that can convert chemical energy into electrical energy by a chain of reactions. In this work, the performance of the proton exchange membrane fuel cell was investigated. With the help of software prepared by us, voltage signals that obtained from the proton exchange membrane fuel cell were observed. Since voltage signals formed between the terminals with the running of the proton exchange membrane fuel cell were analogue, an electronic circuit which prepared by us that converts analogue signals into digital signals was used. With these data voltage-time curves were plotted according to different feeding conditions of the proton exchange membrane fuel cell. Polarization curve was obtained by voltage and current changing when external load resistance is kept wide. In the polarization curve, voltage-current relation can be examined in three different regions. The electrical power of the proton exchange membrane fuel cell was determined. As a result, it was concluded that the performance of proton exchange membrane fuel cell depends on the load resistance, on the type and quantity of the fuel/oxidizer that feeds the cell, and on the discharge of water resulting from the electrochemical reactions. According to these, it was determined that start-up speed of the proton exchange membrane fuel cell was high, it reaches constant voltage values in a short time, and their maximum electrical power is within the limits of the ohmic and the concentration region.