HIGH TEMPERATURE THERMOELECTRIC RESEARCH
Quarterly progress rept. no. 5, 1 Jan-29 Mar 1963
MONSANTO RESEARCH CORP DAYTON OH
Pagination or Media Count:
An experimental model 5-watt nominal generator completed 2556 hrs of a sustained performance test at a hot-end temperature of 1200 C 25C-4 C, cold end at 714 C 12 C-0 C,in a vacuum of l0exp-6 mm Hg without degradation in power producing characteristics. The powerweight ratio of this generator, exclusive of heat source, ranged from 2.70 to 2.86 wattlb. Tests at l300 C and higher temperatures will be attempted with this generator. Graphite-ended segmented modules of n- and p-type thermoelectric materials to supplement p-type MCC 50, the thermoelectric material used in the 5-watt generator, were fabricated and partially evaluated. The first such p-n couple produced 250 more power than the p-type MCC-molybdenum couple used in the 5-watt generator. Improved emissive coatings and lightweight Junctions between modules were produced. The developments suggest that an advanced experimental 50-watt generator having a powerweight ratio of 10-20 wattlb is feasible.
- Electric Power Production and Distribution