Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574597
Title: Water management in PEM fuel cell gass distributor plates
Author: Rosli , Masli Irwan
Awarding Body: University of Leeds
Current Institution: University of Leeds
Date of Award: 2011
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Abstract:
Proton exchange membrane fuel cells are well known to be prormsmg alternative energy converters because of their advantages in power efficiency and low emission. One of the major components in a proton exchange membrane fuel cell is the gas flow-field channels where the reactant gases are distributed to the catalyst layers and the liquid water is accumulated. In this investigation, a fuel cell test station was designed and fabricated in order to perform experimental investigations on the proton exchange membrane fuel cell. Direct visualisation techniques have been applied in the experimental investigations in order to capture visuals of the liquid water behaviour in the gas flow-field channels. The visuals were captured by using a transparent proton exchange membrane fuel cell which has been specifically designed for this investigation. The power performance of the transparent proton exchange membrane fuel cell has been evaluated at the various cathode gas inlet relative humidity's and gas inlet flow rates. Both 2D and 3D proton exchange membrane fuel cell models have been developed in this investigation in order to simulate the power performance of the proton exchange membrane fuel cell and to predict water profiles in the gas flow- field channels. The operating conditions for the experimental investigations and the produced data, namely the power performance curves and the visuals of the liquid water distributions in the gas flow-field channels have been used in order to set up the models and also to validate the simulation results. Observations on the visualisation experimental investigations on the transparent proton exchange membrane fuel cell have revealed some very interesting liquid water behaviours, namely the cyclic formation of the liquid water and the positive effect of the water slug movements in the gas flow-field channels. The gas inlet relative humidity was observed to significantly affect to this liquid water behaviour. In addition, the cathode gas inlet relative humidity was observed to produce a larger effect compared to the anode gas inlet relative humidity o~ the power performance , of the proton exchange membrane fuel cell. The developed 2D model was tested and it was found to be capable of producing good results in the prediction of the power performance of the proton v exchange membrane fuel cell. However, the 3D model was found to perform better, u, in particular the relative humidity profiles over the whole region of the gas flow- field channels. This provides further information on the formation of the liquid water in the gas flow-field channels and this can be evaluated in the water management of the proton exchange membrane fuel cell.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.574597  DOI: Not available
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