Abstract
Combined-cycle power plants comprising a gas turbine topping cycle, a heat recovery boiler (without or with firing) and a steam turbine bottoming cycle are known to have the highest thermal efficiency attainable in present-day power plants. This analysis pursues the purpose of predicting the influence of cycle and component improvements on plant efficiency. Using a cycle analysis procedure based on realistic consistent assumptions, a systematic study of parameter influences has been made. The variations concern the gas turbine cycle as well as the steam cycle (loop layout and live steam parameters). Component characteristics like efficiencies and pressure drops are represented by physically coherent state-of-the-art data. The analysis is performed as a parametric study, with the plant power rating being eliminated by normalizing the results to units compressor air mass flow. Parameters varied are the main features of the gas turbine cycle (peak temperature ratio and compressor pressure ratio) and the live steam pressure, the latter being optimized for maximum efficiency within the existing technological limits. Three steam cycle layouts of increasing complexibility are considered. The influence of second-rank parameters is quantified by sensitivity factors. The results comprise the dependence of plant efficiency, heat transfer area and specific power output on
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Citation Formats
Rufli, P.
Systematic calculations of combined gas-steam-power plants; Systematische Berechnungen ueber kombinierte Gas-Dampf-Kraftwerke.
Switzerland: N. p.,
1990.
Web.
Rufli, P.
Systematic calculations of combined gas-steam-power plants; Systematische Berechnungen ueber kombinierte Gas-Dampf-Kraftwerke.
Switzerland.
Rufli, P.
1990.
"Systematic calculations of combined gas-steam-power plants; Systematische Berechnungen ueber kombinierte Gas-Dampf-Kraftwerke."
Switzerland.
@misc{etde_10152840,
title = {Systematic calculations of combined gas-steam-power plants; Systematische Berechnungen ueber kombinierte Gas-Dampf-Kraftwerke}
author = {Rufli, P}
abstractNote = {Combined-cycle power plants comprising a gas turbine topping cycle, a heat recovery boiler (without or with firing) and a steam turbine bottoming cycle are known to have the highest thermal efficiency attainable in present-day power plants. This analysis pursues the purpose of predicting the influence of cycle and component improvements on plant efficiency. Using a cycle analysis procedure based on realistic consistent assumptions, a systematic study of parameter influences has been made. The variations concern the gas turbine cycle as well as the steam cycle (loop layout and live steam parameters). Component characteristics like efficiencies and pressure drops are represented by physically coherent state-of-the-art data. The analysis is performed as a parametric study, with the plant power rating being eliminated by normalizing the results to units compressor air mass flow. Parameters varied are the main features of the gas turbine cycle (peak temperature ratio and compressor pressure ratio) and the live steam pressure, the latter being optimized for maximum efficiency within the existing technological limits. Three steam cycle layouts of increasing complexibility are considered. The influence of second-rank parameters is quantified by sensitivity factors. The results comprise the dependence of plant efficiency, heat transfer area and specific power output on the gas turbine cycle used with optimized steam cycles of varying complexity. It is shown that auxiliary firing in the boiler up to max. 1000 deg. C permits the use of steam cycles which yield combinations of high efficiency with very high specific plant power at moderately increased complexity of the overall plant. (author) figs., tabs., 32 refs.}
place = {Switzerland}
year = {1990}
month = {Dec}
}
title = {Systematic calculations of combined gas-steam-power plants; Systematische Berechnungen ueber kombinierte Gas-Dampf-Kraftwerke}
author = {Rufli, P}
abstractNote = {Combined-cycle power plants comprising a gas turbine topping cycle, a heat recovery boiler (without or with firing) and a steam turbine bottoming cycle are known to have the highest thermal efficiency attainable in present-day power plants. This analysis pursues the purpose of predicting the influence of cycle and component improvements on plant efficiency. Using a cycle analysis procedure based on realistic consistent assumptions, a systematic study of parameter influences has been made. The variations concern the gas turbine cycle as well as the steam cycle (loop layout and live steam parameters). Component characteristics like efficiencies and pressure drops are represented by physically coherent state-of-the-art data. The analysis is performed as a parametric study, with the plant power rating being eliminated by normalizing the results to units compressor air mass flow. Parameters varied are the main features of the gas turbine cycle (peak temperature ratio and compressor pressure ratio) and the live steam pressure, the latter being optimized for maximum efficiency within the existing technological limits. Three steam cycle layouts of increasing complexibility are considered. The influence of second-rank parameters is quantified by sensitivity factors. The results comprise the dependence of plant efficiency, heat transfer area and specific power output on the gas turbine cycle used with optimized steam cycles of varying complexity. It is shown that auxiliary firing in the boiler up to max. 1000 deg. C permits the use of steam cycles which yield combinations of high efficiency with very high specific plant power at moderately increased complexity of the overall plant. (author) figs., tabs., 32 refs.}
place = {Switzerland}
year = {1990}
month = {Dec}
}