HYSYDAYS
1st World Congress of Young Scientists on Hydrogen Energy Systems
1st World Congress of Young Scientists on Hydrogen Energy Systems
ISBN Print: 1-56700-230-7
TRANSIENT POWER LOAD MEASUREMENT OF A SMALL SCALE ELECTRICAL AUTOMOTIVE ENGINE POWERED BY A PROTON EXCHANGE MEMBRANE FUEL CELL STACK
DOI: 10.1615/HYSYDAYS2005.620
pages 415-419
Аннотация
The aim of this research is to analyze the behaviour and the
performance of a proton exchange membrane fuel cell (PEM
FC) when transient power loads are applied. This paper
presents a small scale test platform and reports some
experiments to verify the response of the system. The test
equipment includes a 150W self breathing and self humidified
fuel cell stack, a DC motor and a brake. The hydrogen feed is
supplied by means of a pressurized bottle. The cell was forced
to follow a standard urban load cycle and we measured its
performance and average efficiency. We report an average
efficiency of 39% over the entire cycle on the basis of the high
heating vale (HHV) and we observed a good response to fast
load commutations. The main problem of the self breathing fuel
cells is oxygen starvation when the current reaches high values.
In order to overcome this problem a control strategy of the
cooling fans has been set up: it is suitable to regulate
appropriately both the temperature of the stack and the oxygen
needs at the cathode. This allows to overcome the problem
without the introduction of a compressor and therefore enables
to maximize the entire system efficiency.
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