PULSE POWER FUEL CELL.
Quarterly progress rept. no. 3, 15 Aug-15 Nov 66,
PRATT AND WHITNEY AIRCRAFT GROUP EAST HARTFORD CT
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This program is to investigate fuel cells for short duration, high intensity electrical power pulses. During this reporting period, single cell tests on H2-O2 were performed on 12 sq. in. screen electrode cells at 160 F with higher catalyst loading and with nonprecious metal catalyst at the cathode. Peak power level obtained was 4300 watts sq. ft. Tests on dual porosity cell at 450 F with free electrolyte gave up to 5000 wattssq. ft. for 450 microseconds. Over 2200 wattssq. ft. was obtained with this cell for 100 milliseconds. Capacitance of the various configurations tested was found to be 10-900 faradssq ft. A catalyzed screen electrode cell with trapped electrolyte was tested over a range of temperatures on H2-O2 and at 160 F on H2-Air. Current levels up to 15,600 amps sq ft. 5900 wattssq. ft. were recorded. Additional tests were conducted on a free electrolyte cell at 400 F showing that electrolyte IR loss is not a current limiting factor for short discharge periods. The breadboard cell stack configuration scheduled for test during the next reporting period will include six low temperature trapped electrolyte cells with catalyzed screen electrodes and solid bipolar separator plates. Author
- Electric Power Production and Distribution