Emittance theory for thin film selective emitter
- NASA Lewis Research Center, Cleveland, Ohio 44135 (United States)
- School of Technology, Kent State University, Kent, Ohio 44242 (United States)
Thin films of high temperature garnet materials such as yttrium aluminum garnet (YAG) doped with rare earths are currently being investigated as selective emitters. This paper presents a radiative transfer analysis of the thin film emitter. From this analysis the emitter efficiency and power density are calculated. Results based on measured extinction coefficients for erbium-YAG and holmium-YAG are presented. These results indicate that emitter efficiencies of 50% and power densities of several watts/cm{sup 2} are attainable at moderate temperatures ({lt}1750 K). {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 165960
- Report Number(s):
- CONF-940101-; ISSN 0094-243X; TRN: 9502M0021
- Journal Information:
- AIP Conference Proceedings, Vol. 321, Issue 1; Conference: 11. symposium on space nuclear power systems, Albuquerque, NM (United States), 9-13 Jan 1994; Other Information: PBD: 5 Jan 1995
- Country of Publication:
- United States
- Language:
- English
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