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Oil & Gas Science and Technology – Rev. IFP, Vol. 63 (2008), No. 2, pp. 251-261 Copyright © 2007, Institut français du pétrole DOI: 10.2516/ogst:2007076 Gas Turbine Performances Improvement using Steam Injection in the Combustion Chamber under Sahara Conditions A. Bouam1, S. Aïssani2 and R. Kadi1 1 Nuclear Research Center of Birine CRNB, P0 Box 180, Aïn-Oussera 17200, Djelfa - Algeria 2 Faculty of Hydrocarbons and Chemistry, University M’Hamed Bougara Boumerdes, Street of Independence - Boumerdes, 35000 - Algeria e-mail: Bouam05_abd@yahoo.fr - Slim50dz@yahoo.fr - khaled2003@hotmail.com Résumé — Amélioration des performances des turbines à gaz utilisées dans les conditions sahariennes par injection de vapeur d’eau — Le rôle des turbines à gaz, dans la production d’électricité et l’industrie pétrolière, a pris une dimension particulière ces dernières années. À cet effet différentes méthodes (régénération, refroidissement intermédiaire, préchauffage et injection de vapeur d’eau) ont été utilisées afin d’améliorer les performances des cycles de turbine à gaz. Dans cette optique, la méthode d’injection de vapeur d’eau en amont de la chambre de combustion d’une turbine à gaz a été proposée, étudiée et comparée avec un cycle simple. L’objectif principal de ce travail consiste en l’élaboration d’un programme de calcul de l’influence des conditions ambiantes sur les caractéristiques des différents processus de la turbine à gaz, telles que la compression, la combustion et la détente. Une fois les paramètres de fonctionnement optimaux connus, le calcul des performances de l’installation a été revu en injectant des quantités convenables de vapeur d’eau en amont de la chambre de combustion. Les résultats obtenus sont en accord avec ceux de la littérature et montrent que la méthode d’injection de vapeur d’eau en amont de la chambre de combustion améliore considérablement les performances de la turbine à gaz. Ces résultats sont représentés sous forme de courbes en deux et trois dimensions pour une meilleure illustration des phénomènes physiques. Abstract — Gas Turbine Performances Improvement using Steam Injection in the Combustion Chamber under Sahara Conditions — Gas turbines are generally used for large scale power generation. The basic gas turbine cycle has low thermal efficiency which decreases in the hard climatic conditions of operation, so it is important to look for improved gas turbine based cycles. Among several methods shown their success in increasing the performances, the steam injected gas turbine cycle (STIG) consists to introduce a high amount of steam at various points in the cycle. The objective of the present work is to improve the performances of gas turbine used under Sahara conditions by injecting suitable quantities of steam in the upstream of combustion chamber. The suggested method has been studied and compared with a simple cycle. Efficiency, however, is held constant when the ambient temperature increases from iso conditions to 50°C. Computer program has been developed for various gas turbine processes including the effect of ambient temperature. This is achieved by studying the effect of steam injection on the gas turbine performances. Data from the performance testing of an industrial gas turbine, computer model and theoretical study are used to check the validity of the proposed model. The comparison of the prediction results to the test data is in good agreement.PDF Image | Gas Turbine Improvement with Steam Injection Combustion Sahara Conditions
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