NDLI: Thermal Impacts on the Performance of Nanoscale-Gap Thermophotovoltaic Power Generators

Content Provider	IEEE Xplore Digital Library
Author	Francoeur, M. Vaillon, R. Mengüç, M.P.
Copyright Year	1986
Abstract	The thermal impacts on the performance of nanoscale-gap thermophotovoltaic (nano-TPV) power generators are investigated using a coupled near-field thermal radiation, charge, and heat transport formulation. A nano-TPV device consisting of a tungsten radiator, maintained at 2000 K, and cells made of indium gallium antimonide (In_0.18Ga_0.82Sb) are considered; the thermal management system is modeled assuming a convective boundary with a fluid temperature fixed at 293 K. Results reveal that nano-TPV performance characteristics are closely related to the temperature of the cell. When the radiator and the junction are separated by a 20 nm vacuum gap, the power output and the conversion efficiency of the system are respectively 5.83 × 10⁵ Wm^-2 and 24.8% at 300 K, whereas these values drop to 8.09 × 10⁴ Wm^-2 and 3.2% at 500 K. In order to maintain the cell at room temperature, a heat transfer coefficient as high as 10⁵ Wm^-2 K^-1 is required for nanometer-size vacuum gaps. The reason for this is that thermal radiation since thermal radiation enhancement beyond the blackbody from a bulk radiator of tungsten is broadband in nature, while only a certain part of the spectrum is useful for maximizing nano-TPV performance. In future studies, near-field radiation spectral conditions leading to optimal performance characteristics of the device will be investigated.
Sponsorship	IEEE Power Engineering Society
Starting Page	686
Ending Page	698
Page Count	13
File Size	1129720
File Format	PDF
ISSN	08858969
Volume Number	26
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heating Nanoscale devices Photonic band gap Absorption Mathematical model Radiative recombination Temperature thermal effects Energy conversion nanoscale-gap thermophotovoltaic near-field thermal radiation
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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