Affiliation:
1. Heat Transfer Laboratory, Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel
Abstract
Our work focuses on an array of hollow blocks formed on a two-sided plate,
inserted in a rectangular channel, heated and exposed to forced convection of
air at room temperature. The thermal performance of the extended surface of
the plates is investigated within a range of air velocities and power input.
The investigation is conducted experimentally, using an infrared camera, and
numerically in a 3-D computational domain. The experimental results and the
numerical calculations showed quantitatively a satisfactory agreement. As
expected, the heat transfer rates significantly increased as the air
velocity in the channel increased. At low velocities the thermal performance
of the extended plate compared to the performance of a flat plate. A
numerical analysis of the extensions size and the ratio of plate height to
width were also carried out and its effect upon the thermal performance of
the system was examined. Relation between fluid pressure losses and heat
transfer was studied and generalized. The application of the surfaces
extended by blocks is found in several industries, for example in electronic
equipment, solar industry, and others.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment
Cited by
1 articles.
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