Different Productive Structures for the Thermoeconomic Analysis of a Combined Power Plant

ARENA, AP; BORCHIELLINI, R

INTERNATIONAL JOURNAL OF THERMAL SCIENCES

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

Año: 1999 vol. 38 p. 601 - 612

1290-0729

The effect of different productive structures on the results of the thermoeconomic analysis of a combined thermal power plant is analysed here. Four different representations have been taken into account, using different kinds of flows (physical, thermal, mechanical and chemical exergy and negentropy flows), and some variations in the aggregation level. The influence of these choices on the average costs of the products of the different components and of the total system has been studied. The studied system is a 700 MW combined cycle power plant, composed of two identical modules, each with two gas turbines which, after producing the required work, release hot gases into a heat recovery steam generator. This component generates steam at two different pressure levels, which are used to move two steam turbines that produce additional work.