Brennstoff-Warme-Kraft, Vol.48, No.1-2, 33-45, 1996
Heat shifting systems in gas turbine processes .2. Cases of application
The economic significance of gas turbines for the electricity and steam generation has increased considerably in recent years. The importance of the utilization of waste heat from a combination process follows this development very quickly. For an existing plant, the proportion of the generated electricity or the amount of steam, respectively, is only variable in very narrow limits. The heat shifting systems - known up to now -with variable admission of the steam turbine enable, however, only an independent mode of operation of the plant within a relatively narrow range of the electricity or heat demand, respectively. New heat shifting systems can extend this range considerably and, at the same time, increase the electricity exponent and the efficiency of the plant. With it, the old recuperation principle becomes relevant again. In Part 1 of this article, the fundamental thermodynamic interrelations, as well as the emission difficulties of the gas turbine in the recuperative cyclic process, were shown. Part 2 - presented here - shows possible cases of application.