The thermal behavior of spherically curved solar collector mirror panels exposed to concentrated solar radiation
Under certain conditions the mirror panels in 'Fixed Mirror Distributed Focusâ€™ (FMDF) type of solar collectors are subject to a moving heat source (hot spot) formed by concentrated solar radiation. A two-dimensional finite difference scheme was devised to predict the temperature distribution in the panels under these conditions. The predicted results were compared with experimental data and, show good agreement. The prediction model is therefore considered adequate for use in design and selection of materials for the panels. Some parametric studies based on the above model show that severity of the problem can be reduced by choosing mirror materials having higher thermal capacity and lower absorptivity.