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
