APPLICATION OF THE EXERGETIC COSTS THEORY TO A STEAM BOILER IN A THERMAL GENERATING STATION.

Abstract:

This article gives the results to an exergetic costs analysis of a steam boiler in a 350 MW thermal generating station using coal (lignite) as the base fuel. It is shown that conventional performance tests are insufficient when we wish to determine the causes of low boiler performance, and to quantify the effects of this on additional fuel consumption. The values obtained are discussed while comparing the results of real operation from three performance tests with the design conditions. Definitive conclusions on the boiler's real performance can only be drawn from analyzing the variations in the exergetic costs of the total product and their causes. Other parameters (energy efficiency, exergy efficiency, availability coefficient, etc. ) only reflect part of the effects and, therefore, do not unequivocally determine the overall process efficiency. In any case, it is absolutely necessary to include the auxiliary systems (mills, fans, air-steam heaters, etc. ) in the analysis.

Año de publicación:

1987

Keywords:

Fuente:

scopus