Solar Collectors with Tubes Partially Filled with Porous Substrates

[+] Author and Article Information
M. K. Alkam, M. A. Al-Nimr

Mechanical Engineering Department, Jordan University of Science and Technology, Irbid-Jordan

J. Sol. Energy Eng 121(1), 20-24 (Feb 01, 1999) (5 pages) doi:10.1115/1.2888137 History: Received March 01, 1997; Revised December 01, 1998; Online February 14, 2008


In this work, the thermal performance of a conventional collector is improved by inserting porous substrates at the inner walls of the collector tubes. The porous substrates improve the convective heat transfer coefficient between the tube wall and the fluid. This improvement is investigated numerically and its effects on the efficiency and the useful gain of the collector are evaluated. It is found that inserting the porous substrate may raise the collector efficiency considerably, especially at high values of the overall heat loss coefficient.

Copyright © 1999 by The American Society of Mechanical Engineers
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