100 WATT THERMOELECTRIC POWER SYSTEM FOR BUOY APPLICATIONS.
Monthly progress rept. no. 21, 11 Feb-11 Mar 66,
WESTINGHOUSE ELECTRIC CORP LIMA OHIO AEROSPACE ELECTRICAL DIV
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The first thermoelectric generator was disassembled, the trouble areas defined and corrected. The investigation of the electrical short to ground showed that several pieces of the mica on the hot core had failed in tension allowing the hot straps on the high temperature thermopile to ground to the core. Further investigation indicated that moisture in the MIN-K 2000 had severely oxidized the interior parts and would have caused additional problems. Three pieces of phlogopite mica will be used on the hot core. The two pieces .002 inches thick each closest to the hot core will be split to allow slippage. The total thickness of mica on the hot core is now .008 inches. To prevent further contamination by entrapped water in the MIN-K 2000 a processing cycle has been developed see Appendix. Prior to welding the end pieces to the generator, the assembly will be pumped down to 1x10 to the minus 6th power torr at 300F for a minimum of 4 hours while monitoring with a residual gas analyzer CEC Model 614 with a sensitivity of 5x10 to the minus 11th power torrdivision to nitrogen to insure that no further outgassing of O2 and H2O is occurring. The assembly will then be finish welded and leak tested in an argon atmosphere.
- Electric Power Production and Distribution
- Marine Engineering