Noorkami, M;
Robinson, JB;
Meyer, Q;
Obeisun, OA;
Fraga, ES;
Reisch, T;
Shearing, PR;
(2014)
Effect of temperature uncertainty on polymer electrolyte fuel cell performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
, 39
(3)
1439 - 1448.
10.1016/j.ijhydene.2013.10.156.
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Abstract
The temperature of operation is a key parameter in determining the performance and durability of a polymer electrolyte fuel cell (PEFC). Controlling temperature and understanding its distribution and dynamic response is vital for effective operation and design of better systems. The sensitivity to temperature means that uncertainty in this parameter leads to variable response and can mask other factors affecting performance. It is important to be able to determine the impact of temperature uncertainly and quantify how much PEFC operation is influenced under different operating conditions. Here, a simple lumped mathematical model is used to describe PEFC performance under temperature uncertainty. An analytical approach gives a measure of the sensitivity of performance to temperature at different nominal operating temperatures and electrical loadings. Whereas a statistical approach, using Monte Carlo stochastic sampling, provides a ‘probability map’ of PEFC polarisation behaviour. As such, a polarisation ‘area’ or ‘band’ is considered as opposed to a polarisation ‘curve’. Results show that temperature variation has the greatest effect at higher currents and lower nominal operating temperatures. Thermal imaging of a commercial air-cooled stack is included to illustrate the temporal and spatial temperature variation experienced in real systems.
| Type: | Article |
|---|---|
| Title: | Effect of temperature uncertainty on polymer electrolyte fuel cell performance |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ijhydene.2013.10.156 |
| Publisher version: | http://dx.doi.org/10.1016/j.ijhydene.2013.10.156 |
| Additional information: | © 2013, The Authors. Published by Elsevier Ltd. All rights reserved. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-No Derivative Works License, which permits non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Keywords: | Polymer electrolyte fuel cell, Polarisation area, Temperature uncertainty, Monte Carlo sampling, Thermal imaging |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1419709 |
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