HEAT SHIFTING SYSTEMS IN GAS-TURBINE PROC ESSES .1. THERMODYNAMIC FUNDAMENTAL PRINCIPLES

The economic significance of gas turbines for the generation of electr icity and steam has increased considerably in recent years. The import ance of the utilization of the waste heat from the combined process fo llows this development rapidly. In the case of an existing plant, howe ver, the proportion of the generated electricity or steam load is only variable within very narrow limits. The heat shifting systems, known up to now, with variable admission of the steam turbine enable, howeve r, only an independent mode of operation of the plant within a relativ ely narrow range of the electricity of heat demand, respectively. The new type of heat shifting systems can extend the latitude of this rang e considerably and at the same time increase the electricity exponent and the efficiency of the plant. With it, the old recuperation princip le becomes relevant again. In Part 1 presented of this paper, the basi c thermodynamic interrelations as well as the emission problem of the gas turbine in the recuperative cycle are demonstrated. Part 2 shows p ossible cases of application.