Dimensionless heat transfer correlations for estimating edge heat loss in a flat plate absorber
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Date
Authors
Nwosu, Paul N.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
Data obtained from heat transfer relations discretized with the finite element method
were used in developing dimensionless correlations, which led to determining prediction equations
for the average edge temperature of a flat plate absorber. For a prescribed flux, if parameters like
the incident radiation intensity, edge insulation thermal conductivity and ambient temperature are
known, the value of the edge temperature variable is immediately determined. A range of edge-to-absorptive
area ratios is considered, as well as the effects of the edge insulation on enhancing thermal
performance. Notably, the edge loss is high in absorbers with high edge-to-absorptive area ratios and
ambient conditions with low ha and Ta. In extreme operating conditions, however, the loss can be
employed of a high proportion. As a result, prediction equations are obtained, which can be employed
in design and simulation so as to minimize useful energy losses and thereby improve efficiency
Description
Keywords
Heat transfer correlations, Estimating edge heat loss
Sustainable Development Goals
Citation
Nwosu, PN 2012, 'Dimensionless heat transfer correlations for estimating edge heat loss in a flat plate absorber', Journal of Engineering Thermophysics, vol. 21, no. 3, pp. 198-211, doi: 10.1134/S1810232812030058.