Accession Number : AD0821306

Title :   LIGHTWEIGHT HIGH-POWER THERMOELECTRIC MODULE DEVELOPMENT.

Descriptive Note : Quarterly progress rept. 1 Jul-30 Sep 67,

Corporate Author : ATOMICS INTERNATIONAL CANOGA PARK CALIF

Personal Author(s) : Rocklin,S. ; Leonard,D. ; Block,S.

Report Date : 15 OCT 1967

Pagination or Media Count : 38

Abstract : This report describes the technical effort directed toward the development of a lightweight high-power thermoelectric module suitable for use with an isotopic heat source in spacecraft vehicle power systems. The primary objective of the program is to design, fabricate, and test a thermoelectric module capable of achieving an efficiency of 10% at a specific power output of 40 watts/lb. A cascaded module design using SiGe and PbTe has been selected to meet these objectives. The first cascaded sub-module consisting of two SiGe couples and four PbTe couples has been placed on test. Due to incomplete bonding between the PbTe stage cold junction and the cold plate the design temperature distribution was not obtained; however, extrapolation of the measured power output to the design temperature conditions results in close correlation with the design performance. The extrapolated power output was 3.3 watts compared to a design value of 3.2 watts. A second sub-module using improved fabrication techniques has been built, and the fabrication of a 25-watt module has been initiated.

Descriptors :   (*THERMOCOUPLES, *MODULES(ELECTRONICS)), (*AUXILIARY POWER PLANTS, THERMOCOUPLES), THERMOELECTRICITY, POWER, SILICON ALLOYS, GERMANIUM ALLOYS, LEAD ALLOYS, TELLURIUM ALLOYS, CASCADE STRUCTURES, HEATERS, SPACECRAFT

Subject Categories : Electric Power Production and Distribution

Distribution Statement : APPROVED FOR PUBLIC RELEASE