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An All-Carbon Solar Thermophotovoltaic System
Pages: 698-702
Year: Issue:  4
Journal: Journal of Engineering Thermophysics

Keyword:  solar thermophotovoltaicall-carbonwoodpile carbon nanotube emitterSTPV theoretical model;
Abstract: Solar thermophotovoltaic(STPV) is a promising method to harvest solar energy.Carbon nanomaterials possess exceptional physical and chemical properties which make them attractive for the next-generation STPV systems.This paper presents an all-carbon STPV(CSTPV) system with a vertically aligned multiwall carbon nanotube(MWCNT) absorber and a woodpile structured MWCNT emitter.The woodpile structured MWCNT emitter has wavelength selective emissivity matching the photovoltaic cell band gap for both polarizations.Then a theoretical STPV model combining energy balance model and equivalent circuit model is developed and used to characterize the CSTPV system.The CSTPV system has a maximum efficiency of 16.2% with an emitter-to-absorber area ratio of 3 and an optical concentration factor of 3000.This efficiency is 30.6%greater than the efficiency of a STPV system with a tungsten emitter.
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