Optimization of Multicolor Photothermal Power Plants in the Solar System: A Finite - Time Thermodynamic Approach

(Received 4 January 1995, revised 24 July 1995, accepted 16 October 1995)

Abstract
This paper deals with the performance of photothermal multicolor and omnicolor converters in the Solar system. Both interplanetary power stations and power systems placed on the surface of different planets were analyzed. The power station consists of a multicolor converter - endoreversible thermal engine combination. In the case of ground based planetary stations the thermal engine is assumed to be of the Curzon - Ahlborn type. The interplanetary stations, which are characterized by a nonlinear heat transfer between the engine and the ambient, are treated by using a simple model developed in the paper. The influence of the radiation concentration on the system performance is outlined. The effect of the Sun's zenith angle is also discussed. Spectral distributions of the collector and radiator optimum temperatures are shown.