Thermal Performance of a Receiver Located in the Caustic Area of a Cylindro-Parabolic Solar Concentrator

Indirect solar dryers with solar collectors, do not always make it possible to reach the desired temperature level and drying time. As part of the improvement of the thermal performance of these systems, a study of the caustic zone is first presented. It is in this zone that the tubular receiver of the studied insolator is placed. The system of equations obtained results from the division of the insolator into fictitious slices of length dz, in which the thermal balance is established. It is solved using an iterative method with finite differences. The volumetric flow rate and the temperature of the heat transfer fluid which can be injected into the drying cage during a day are thus determined at the outlet.