Accession Number : AD0427285


Title :   HIGH TEMPERATURE THERMOELECTRIC RESEARCH.


Descriptive Note : Quarterly progress rept. no. 1, 15 Sep-31 Dec 63,


Corporate Author : MONSANTO RESEARCH CORP DAYTON OHIO


Personal Author(s) : Henderson,C M


Report Date : 31 Dec 1963


Pagination or Media Count : 60


Abstract : A study is presented of the feasibility of utilizing high temperature thermoelectric generators, powered with nuclear and solar heat sources for long-lived power supplies for aerospace vehicles. A 50-watt laboratory generator, fabricated of segmented thermoelements and preliminarily tested, was subjected to sustained testing with its hot-junction 1215 C, its cold junction 570 C and in a vacuum of 10 to the -5th power to 10 to the -6th power Torr. This generator exhibited a 12.8 watt/lb performance ratio at an overall thermal efficiency of 2%. At the end of 266 hrs continuous performance, an unstable power output condition of the generator halted the test. Investigation of the causes of the unstable power output showed that the intermediate junction design temperature of the segmented n-type thermoelements used in the generator had been exceeded by about 100 C. No damage to the high temperature (850-1200 C) thermoelectric segments or junction materials was sustained. (Author)


Descriptors :   *GENERATORS , *ENERGY CONVERSION , THERMOELECTRICITY , THERMOELECTRICITY , SPACECRAFT , NUCLEAR ENERGY , SOLAR RADIATION , PERFORMANCE(ENGINEERING) , EXPERIMENTAL DATA , FAILURE(MECHANICS) , THERMOCOUPLES , VIBRATION , CONFIGURATIONS , TEMPERATURE , WEIGHT , ELECTRIC ARCS , PLASMAS(PHYSICS) , FLAME SPRAYING , AUXILIARY POWER PLANTS , COATINGS , WIRE , MOLYBDENUM , GRAPHITE , RADIOACTIVE ISOTOPES , POWER , TEST FACILITIES , HIGH TEMPERATURE , SCIENTIFIC RESEARCH , POWER SUPPLIES , AEROSPACE CRAFT , ELECTRIC POWER PRODUCTION


Distribution Statement : APPROVED FOR PUBLIC RELEASE