A Method for Calculating the Indices of Energy Efficiency of Condensing Power Units Reconstructed into Semidependent Combined-Cycle Installations

摘要

The main indices of the energy efficiency of steam-gas (combined-cycle) installations in a semide-pendent scheme are determined and analyzed on the basis of the developed method of calculation for the particular example of a 300-MW power unit and a GTG-110 gas-turbine installation. The effect of the governing factors on the indices of such combined-cycle installations is revealed. It is shown that when reconstructing a condensing power unit of supercritical pressure into a combined-cycle installation of such a type, the specific fuel consumption is reduced on average by 8% and the efficiency increases by approximately 3.4%.