HIGH TEMPERATURE THERMOELECTRIC RESEARCH

Abstract

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 l0(exp-6) mm Hg without degradation in power producing characteristics. The power/weight ratio of this generator, exclusive of heat source, ranged from 2.70 to 2.86 watt/lb. 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 power/weight ratio of 10-20 watt/lb is feasible.

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Document Details

Document Type
Technical Report
Publication Date
Mar 29, 1963
Accession Number
AD0402071

Entities

People

  • C. M. Henderson

Organizations

  • Monsanto

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Additives (Chemicals)
  • Assembly
  • Diameters
  • Electrical Properties
  • Electrical Resistance
  • Elements
  • Fabrication
  • Heat Shields
  • High Temperature
  • Mass Production
  • Materials
  • Measurement
  • Mechanical Properties
  • Metals
  • Radiation
  • Resistance
  • Test And Evaluation

Readers

  • Solar Photovoltaics and Thermoelectric Devices.
  • Thermal Physics or Thermal Science.