Control of spectral emittance using a rare‐earth oxide film coated on a ceramic plate |
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| Authors: | Tomoyuki Kumano Katsunori Hanamura |
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| Affiliation: | 1. Department of Mechanical Engineering, Kobe City College of Technology, Japan;2. Research Center for Carbon Recycling and Energy, Tokyo Institute of Technology, Japan |
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| Abstract: | The spectral emission of a ceramic plate coated with a rare‐earth oxide thin film was investigated for thermophotovoltaic (TPV) applications using a one‐dimensional radiative transfer analysis. The selective emitter has emission bands at wavelengths around 1 and 1.5 μm due to erbium. In the temperature range between 1400 and 1500 K, the radiant energy within these bands is remarkably large, because the Planck distribution has a peak at a wavelength of approximately 2 μm. In addition, the spectral response of a GaSb TPV cell has a peak at around 1.5 μm; therefore, the radiant energy of the emission bands is quite useful for the TPV generation of electricity. The total spectral efficiency for both the 1 μm and 1.5 μm bands reaches a maximum value of 0.295 for a film thickness between 0.2 and 0.3 mm. © 2010 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.20286 |
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| Keywords: | spectral emittance rare‐earth oxide thin film selective emitter |
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