Thermal spray approach for TPV emitters

Crowley, Christopher J.; Elkouh, Nabil A.; Magari, Patrick

doi:10.1063/1.57801

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…Numerous investigators have pursued development of hot side TPV spectral control technologies which include: selective, textured, filtered, or photonic crystal radiators [27][28][29][30][31][32][33][34][35][36]. Selective radiators (e.g.…”

Section: Wavelength Selective Radiatorsmentioning

confidence: 99%

Thermophotovoltaic Spectral Control

Fourspring¹

2004

AIP Conference Proceedings

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Spectral control is a key technology for thermophotovoltaic (TPV) direct energy conversion systems because only a fraction (typically less than 25%) of the incident thermal radiation has energy exceeding the diode bandgap energy, E g , and can thus be converted to electricity. The goal for TPV spectral control in most applications is twofold:1. Maximize TPV efficiency by minimizing transfer of low energy, below bandgap photons from the radiator to the TPV diode. 2. Maximize TPV surface power density by maximizing transfer of high energy, above bandgap photons from the radiator to the TPV diode.TPV spectral control options include: front surface filters (e.g. interference filters, plasma filters, interference/plasma tandem filters, and frequency selective surfaces), back surface reflectors, and wavelength selective radiators. System analysis shows that spectral performance dominates diode performance in any practical TPV system, and that low bandgap diodes enable both higher efficiency and power density when spectral control limitations are considered. Lockheed Martin has focused its efforts on front surface tandem filters which have achieved spectral efficiencies of ~83% for E g = 0.52 eV and ~76% for E g = 0.60 eV for a 950 o C radiator temperature.

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Section: Wavelength Selective Radiatorsmentioning

confidence: 99%

Thermophotovoltaic Spectral Control

Fourspring¹

2004

AIP Conference Proceedings

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“…Some of the substrate surfaces were coated with reflective layers of refractory metals (platinum or rhodium) to suppress unwanted out-of-band radiation from the substrates. An overall thickness ranging between 15-250 µm has been deposited by multiple passes (a few microns each) of a plasma-spray apparatus [50]. An alternative method for the production of porous, polycrystalline coatings was proposed by Diso et al based on the sintering of reactive slurries [51].…”

Section: Porous Coatingsmentioning

confidence: 99%

The challenge of high-performance selective emitters for thermophotovoltaic applications

Licciulli

Diso

Torsello

et al. 2003

Semicond. Sci. Technol.

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We present a brief survey of the most significant contributions to the study and the development of selective emitters for high-temperature applications. After a brief introduction and some necessary notes on definitions and experimental methods, this review presents the many different solutions proposed so far from the point of view of both the optimization of the functional properties of selective emitters and the fulfilment of the severe thermostructural requirements imposed by most high-temperature applications such as thermophotovoltaics.

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“…Some effort has been put into enhancing the efficiency of TPVs by the development of emitters whose output is better matched to the semiconductor absorption spectrum. Ceramic materials based on rare-earth oxides, such as ytterbia and erbia [26] were used in the first generation of TPVs. These essentially convert some radiation from a broad-band spectrum into a narrower band at longer wavelength and are known as selective emitters.…”

Section: Factors Affecting Efficiencymentioning

confidence: 99%

Thermophotovoltaics: Can They Make a Significant Contribution?

Haywood

2000

Energy & Environment

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Recently, a number of research initiatives have focused on thermophotovoltaic (TPV) cells as a means of generating electricity from infra-red radiation. This may be from waste heat, as in the hybrid car which uses TPV technology to charge its battery, or it may involve co-generation of electricity from processes where heat is the primary product. One example is the provision of electrical power from the burner of a domestic boiler in a remote location. In this article, the principles of TPV technology are outlined and its present capabilities discussed. An analysis is made of the efficiency that can be achieved now and in the future and the cost of implementing the technology for different applications. The potential of TPV for domestic, space and military applications is discussed.

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Thermal spray approach for TPV emitters

Cited by 9 publications

References 4 publications

Thermophotovoltaic Spectral Control

Thermophotovoltaic Spectral Control

The challenge of high-performance selective emitters for thermophotovoltaic applications

Thermophotovoltaics: Can They Make a Significant Contribution?

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