期刊
OPTICS EXPRESS
卷 19, 期 10, 页码 A245-A257出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.19.00A245
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资金
- National Science Foundation [DMR-0819762]
- MIT S3TEC Energy Research Frontier Center of the Department of Energy [DE-SC0001299]
- Army Research Office through the Institute for Soldier Nanotechnologies [DAAD-19-02-D0002, W911NF-07-D0004]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [819762] Funding Source: National Science Foundation
Solar thermal, thermoelectric, and thermophotovoltaic (TPV) systems have high maximum theoretical efficiencies; experimental systems fall short because of losses by selective solar absorbers and TPV selective emitters. To improve these critical components, we study a class of materials known as cermets. While our approach is completely general, the most promising cermet candidate combines nanoparticles of silica and tungsten. We find that 4-layer silica-tungsten cermet selective solar absorbers can achieve thermal transfer efficiencies of 84.3% at 400 K, and 75.59% at 1000 K, exceeding comparable literature values. Three layer silica-tungsten cermets can also be used as selective emitters for InGaAsSb-based thermophotovoltaic systems, with projected overall system energy conversion efficiencies of 10.66% at 1000 K using realistic design parameters. The marginal benefit of adding more than 4 cermet layers is small (less than 0.26%, relative). (C) 2011 Optical Society of America
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