GATE: A Simulation Code for Analysis of Gas-Turbine Power Plants

Erbes, M.; Cohn, A.

doi:10.1115/89-gt-39

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…To perform the calculation, the Gate Cycle power plant computational code (Erbes et al, 1989) has been employed. It considers the variation of specific heat along compression and expansion, the cooling mass flow rate injected into each stage and bled at an appropriate compressor pressure, and the effective gas mixture composition in the different expansion stages.…”

Section: Methodsmentioning

confidence: 99%

Energy System Sensitivity Parameter

Montenegro

Peretto

1997

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration

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In this paper, sensitivity analysis of energy systems was developed. This analysis was performed by using a quantity called sensitivity parameter, suitable for this purpose. The parameter establishes the relative influence of input variables on the calculation results. The sensitivity parameter evaluation was carried out by using a numerical procedure. This procedure is very convenient because it permits the employment of computational commercial codes. A Brayton cycle gas turbine power plant was the considered energy system. Sensitivity analysis was developed relatively to conversion efficiency and power output delivered by the system. Three gas turbine typologies were examined: heavy duty, small size and aeroderivative gas turbines. For these gas turbine typologies, in steady state working conditions, the verification case was analyzed and the corresponding input variables assumed. It resulted that the sensitivity parameter values relative to performance are very different according to the input variable considered. Furthermore, the sensitivity parameter values, for an assigned variable, are different for each of the three examined typologies of gas turbines. It was verified that percentage power output and conversion efficiency variations versus percentage variation of each variable is substantially linear for all the variables analyzed. This permits the employment of the sensitivity parameter for evaluating the percentage performance variations for assigned percentage variations of input variables. It also resulted that many of the considered variables have the same sensitivity parameter value if it is relative to power or conversion efficiency. This is important because it simplifies the sensitivity parameter calculation, particularly for the complex energy systems. Moreover, the sensitivity parameter trend versus the input variable value, is substantially the same for the three gas turbine typologies considered. In conclusion, the sensitivity parameter evaluation is interesting since it establishes how much the numerical value of a quantity resulting from the calculation is affected by a quantity assumed as input and by its numerical value.

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Section: Methodsmentioning

confidence: 99%

Energy System Sensitivity Parameter

Montenegro

Peretto

1997

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration

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“…On the other hand, accurate modelling of cooling airflow is a complex task. Cooling flows are a complex function of turbine operating and design parameters such as compressor efficiencies, bleed pressures, turbine gas temperatures and allowable metal temperatures [9]. A large number of detailed gas turbine design information is therefore required for accurate modelling of the performance of modern gas turbines.…”

Section: Cooling Air Evaluationmentioning

confidence: 99%

Performance evaluation of reheat gas turbine cycles

Sarabchi

2004

Proceedings of the Institution of Mechanical Engineers, Part A:

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The role of gas turbine power plants in electrical energy production has been considerably increased in the last two to three decades. Various methods have been proposed to improve the performance of gas turbine cycles. In this research, two methods, a reheat cycle (RC) and a cycle with a reheat and a heat exchanger (RHC), were investigated and compared with a simple cycle (SC). Today, to achieve a higher efficiency and capacity in gas turbines, higher turbine inlet temperatures (1300 8C and more) are used. Basically, application of such temperatures without turbine blade cooling is impossible. Therefore, analysis of gas turbine cycles without considering blade cooling in modelling will certainly not lead to a valid and correct result. The main objective of this paper is to study the performance of an RC and RHC under actual conditions. In this regard, all processes are treated as actual, and in particular a relatively simple and reliable approach is used to predict the amount of cooling air. It should be noted that there are many attempts being made to produce ceramic turbines, for which a much-reduced cooling requirement will be necessary. The results obtained on the basis of a model developed for this research show that reheating in the context of a realistic study may lead to an improvement both in efficiency and in specific net work.

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