Abstract
This paper presents concentration measurements of water vapour and methane, taken
in-situ on an operational solid oxide fuel cell (SOFC) test rig using tunable diode
laser spectroscopy (TDLS). Methane concentration measurements are presented for the TDLS
system and are compared with concentration measurements taken using gas chromatography
(GC). Furthermore, purge times for the SOFC gas-analysis system have been calculated
using TDLS, which are measurements that cannot be obtained directly using GC. Finally,
water vapour concentration measurements in the SOFC cathode are shown for different
system operating conditions: a dry cathode cycle and during the introduction of water
vapour. As GC cannot be used to measure water vapour in the SOFC cathode stream, a
direct comparison cannot be made with the TDLS measurements.
© 2013 IEEE
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