LIGHTWEIGHT HIGH-POWER THERMOELECTRIC MODULE DEVELOPMENT.
Quarterly progress rept. 1 Apr-30 Jun 67,
ATOMICS INTERNATIONAL CANOGA PARK CA
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The 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 preliminary 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 wattslb. A cascaded module design using SiGe and PbTe was selected to meet these objectives. The long-term testing 5000 hr of PbTe elements and bonds was completed and a post-test evaluation was initiated. A 1387-hr test on a 2-couple PbTe submodule was completed. The initial power output was 90 of design value and the total degradation during the test period was 12. The first cascaded submodule consisting of two SiGe couples and four PbTe couples was fabricated and is being prepared for test. Author
- Electric Power Production and Distribution