Thermodynamic Feasibility of Cogeneration Gas/Steam Combined Cycle

Abstract

This paper is to investigate the thermodynamic feasibility of cogeneration gas/steam combined cycle, in which a computer program, called “Cogeneration Design" has been developed using MATLAB (v7.8) for the analysis. In this cycle one can take advantage of the thermal energy to produce steam which can be used in some small and medium-sized factories such as dairy , juice, soap, paper factories, as well as in desalination plants and other industrial applications need hot water or steam. Here, the thermodynamic analysis is carried out according to three cases, (1)non condensing steam turbine, (2) condensing steam turbine, (3)extraction condensing steam turbine. The results obtained show a difference between the three studied cases, in which the overall efficiency is the highest for case (1), equal 52.82 %, then for case (3), equal 49.13 %, then for case (2), equal 45.31 %.