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RESEARCH PAPERS

Two-Dimensional Mathematical Model of Evacuated Tubular Solar Collector

[+] Author and Article Information
F. Rahman, A. S. Al-Zakri, M. A. A. Rahman

Chemical Engineering Department, University of Petroleum and Minerals, Dhahran, Saudi Arabia

J. Sol. Energy Eng 106(3), 341-346 (Aug 01, 1984) (6 pages) doi:10.1115/1.3267605 History: Received February 01, 1982; Online November 11, 2009

Abstract

Analysis of an evacuated tubular solar collector is presented by developing a two-dimensional performance model. The collector uses a thin flat plate spanning its diameter as its absorbing surface. Energy balances are made on collector plate and tube, each considered as a separate unit. It has been found that a zero capacitance model is quite adequate when hourly meteorological data are used, and hence in this study steady state analysis of the collector is made [1]. The overall loss coefficient has been assumed to be constant for the whole plate. The model also includes optical effects. The emphasis of the investigation is to study the two-dimensional effects in the absorber plate housed in evacuated glass cylinders. Performance curves obtained from the two-dimensional model has been compared with that of HW model. It was found that the HW model overestimates the performance.

Copyright © 1984 by ASME
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