  Recently several mathematical models of a solar chimney power plant were
derived, studied for a variety of boundary conditions, and compared against CFD
calculations. The importance of these analyses is about the accuracy of the
derived pressure drop and output power equation for solar chimney power plant
systems (SCPPS). We examine the assumptions underlying the derivation and
present reasons to believe that some of the derived equations, specifically the
power equation in this model, may require a correction to be applicable in more
realistic conditions. The analytical resutls are compared against the available
experimental data from the Manzanares power plant.
