For a new solar flat-plate collector, which is composed of plane glass plates, two aspects of the development are illustrated.
Firstly, the fluid distribution is examined for the occurrence of the heat-carrier fluid in the space between the plates. Starting from a circular port a volumetric flow should be generated through the interspace between the panes. For this, different geometries are analyzed. The distribution is optimized with regard to the full-volumetric flow and the pressure loss.
Secondly, the natural convection is examined between the panes of the insulating layers by using different gas models and network studies. The CFD solutions are compared to analytical values. The problem of convective flows will be discussed as a function of the inclination angle and the pane spacing.