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RESEARCH PAPERS

Analysis of Heat Transfer and Solar Radiation Absorption in an Irradiated Thin, Falling Molten Salt Film

[+] Author and Article Information
B. W. Webb, R. Viskanta

School of Mechanical Engineering, Purdue University, West Lafayette, Ind. 47907

J. Sol. Energy Eng 107(2), 113-119 (May 01, 1985) (7 pages) doi:10.1115/1.3267663 History: Received April 01, 1984; Online November 11, 2009

Abstract

A study was conducted to investigate the heat transfer characteristics of an irradiated, gravity-driven semitransparent fluid flowing over an opaque substrate. The physical model simulated is prototypical of cavity-type solar central receivers. Both absorption and emission in the fluid were considered, while scattering was neglected. The effects of model parameters such as substrate emissivity, fluid layer opacity, spectral nature of incident radiative flux, flow model, and fluid layer physical thickness were investigated. Results are presented for fluid mixed mean temperature and collector efficiency along the layer length in order to evaluate the performance of such systems.

Copyright © 1985 by ASME
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