Utilization of solar energy in South Africa

Abstract

Design curves based on measurements of solar irradiation in South Africa are presented for two geographic areas, the highveld and the Cape Peninsula, giving data on the amount of thermal energy that can be collected from the sun by use of flat-plate solar energy collectors. A brief description of solar collectors and discussion of some of the fundamental aspects of solar energy utilization are included. An example is given to show the design curves may be used to determine the surface area of a solar collector required for a given application. Cost figures are presented which indicate, as an example, that solar energy can be used to provide the domestic hot water supply for a private residence at a cost less than can be realised with conventional coal-burning, oil-burning, or electronic systems.