HEAT SHIFTING SYSTEMS IN GAS-TURBINE PROC ESSES .2. CASES OF APPLICATION

The economic significance of gas turbines for the electricity and stea m generation has increased considerably in recent years. The importanc e of the utilization of waste heat from a combination process follows this development very quickly. For an existing plant, the proportion o f the generated electricity or the amount of steam, respectively, is o nly variable in very narrow limits. The heat shifting systems - known up to now - with variable admission of the steam turbine enable, howev er, only an independent mode of operation of the plant within a relati vely 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 interrelati ons, as well as the emission difficulties of the gas turbine in the re cuperative cyclic process, were shown. Part 2 - presented here - shows possible cases of application.