Abstract: | Forecasting the thermal efficiency of a set of power plants belonging to a country is important for energy, water, and environmental planning.In this article an analysis of the way in which the system thermal efficiency (STE) changes is provided, and a forecasting model for the electric utilities of technology importing countries is developed.The model is based on the identification of the speed with which technology is transferred from abroad and of the adjustment process of the system's efficiency to that of the best plant's.The application of the calculation to the South African utility shows that the STE in the year 2015 will be 20 to 25 percent higher than that in the year 1983. |