Thermodynamic Study of an Indirect Fired Air Turbine Cogeneration System With Regeneration

Abstract

A previous study of an indirect fired air turbine cogeneration system has been extended to include the concept of regeneration. The effect of regenerator effectiveness and full regeneration as well as partial regeneration on system performance parameters (such as fuel utilization efficiency, power-to-heat ratio and second-law efficiency) are examined. An important conclusion of this study is that a regenerative gas turbine cogeneration system is capable of producing large power-to-heat ratios for various process conditions requiring the use of only moderate compressor compression ratio and moderately effective regenerators. It appears that this is an attractive system which could compete in a market that is currently dominated by internal combustion engines when a viable fludized bed air heater is available.

Performance Evaluation of Selected Combustion Gas Turbine Cogeneration Systems Based on First and Second-Law Analysis

“…This important point has also been pointed out by Rosen and Scott (1986). The usefulness of applying the second-law efficiency to the study of gas turbine cogeneration systems has been demonstrated by Manfrida (1985a, 1985b), Huang and Egolfopoulos (1985), Huang and Wang (1987), and Huang and Naumowicz (1987).…”

A Conceptual Design for a Combined Cycle Power Plant Comprising Modified Exhaust-Heated Gas Turbine and a Steam Turbine Plant: Part I — Preliminary Calculations, Basic Dimensions and General Design Conception

“…In the meantime, however, a number of theoretical articles were published in which the authors analysed the most important features of a simple exhaust-heated cycle (open cycle arrangement with indirect firing), the system being treated either as an independent one, meant for production of electricity, or as a more complex system, meant for simultaneous production of steam and electricity. Some of these articles, which ought to be mentioned, are: Huang and Egolfopoulos (1985), Huang and Naumowicz (1987), Huang and Wang (1987), Huang (1991), Lee (1982), Mills and Peltier (1980) and besides a patent by Eberhardt et al (1988), describing a control system of an Indirect Heated Gas Turbine should also be mentioned. Accidentally, almost at the same time the author (1990) resumed some theoretical investigations into the possibilities of practical application of a modified exhaust-heated cycle comprising four sets of turbines and four sets of compressors (with reheat and intercooling) which is different from the commonly analysed simple exhaust heated cycle.…”