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Since fossil-fueled power plants emit large quantity of CO2 into the atmosphere, advance solution by reducing CO2 will reduce global warming. The most promising solution for abatement of CO2 appears to be the materials sink, where recycling is done. Once flue gas has been recycled, CO2 does not escape straight away into the atmosphere. The consumption of fossil fuel also will come down.

In the present work, the possibility of recycling the flue gas in simple and combined gas power plants is studied to reduce the carbon dioxide emission. In these schemes, part quantity of exhaust flue gas will be compressed, mixed with fuel in a TCR (Thermo Chemical Recuperator) vessel raising the temperature of the mixture. The mixture absorbs energy thermally and chemically. The reformed fuel gas is sent to the turbine combustor where combustion is completed using compressed air and the combustion products are expanded. The exhaust gas is first partially cooled as it passes through TCR and the exhaust is used to go to heat exchanger/steam bottoming cycle to utilize the heat.

The present work is also focussed on thermodynamic modeling of various equipments and process involved in the flue gas TCR cycle power plants. Software in mat lab has been developed for evaluation of thermodynamic properties of water and steam; using which different combined cycle plant layout can be analyzed. Performance evaluation and parametric analysis of gas turbine, flue gas TCR simple cycle, steam cycle and flue gas TCR combined cycle have been carried out.

* Mr. V.Karthikeyan is presently working as Sr.Manager (Erection) in Sipat Super Thermal Power Project of NTPC. His communication address is Sipat Super Thermal Power Project, NTPC, P.O. Seepat, Distt. Bilaspur - 495558 (C.G.).
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