LAUSR

Abstract In this study, fuel utilization (U F ) of a PEMFC have been investigated within transfer phenomenon approach. Description of the U F and fuel consumption measurement is the main factor to obtain the U F . The differences between the experimental study and theoretical calculations results in the previous research articles reveal the available theoretical equations should be studied more based on the fundamental affairs of the U F . Hence, there is a substantial issue that the U F description satisfies the principles, and then it can be validated by the experimental results. The results of this study indicate that the U F and power grew by 1.1% and 1%, respectively, based on one degree increased temperature. In addition, for every 1 kPa pressure increment, U F improved considerably by 0.25% and 0.173% in the 40 °C and 80 °C, respectively. Furthermore, in the constant temperature, the power improved by 22% based on one atmospheric growth of the pressure. Results of this research show that the U F has a differential nature, therefore differential equations will be employed to do an accurate theoretical calculation. Accordingly, it seems that the main defect of the theoretical calculation depends on Nernst equation that can be modified by a differential nature coefficient.