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Thermodynamic Analysis of a Gas Turbine Power Plant Modelled with an Evaporative Cooler

Oyedepo, Sunday Olayinka and Kilanko, O. O (2012) Thermodynamic Analysis of a Gas Turbine Power Plant Modelled with an Evaporative Cooler. In: 2012 International Conference on Clean Technology and Engineering Management (ICCEM 2012), 12th-15th, Mechanical Engineering,Covenant University,Ota,Nigeria.

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Performance of a gas turbine is mainly depends on the inlet air temperature. The power output of a gas turbine depends on the flow of mass through it. Inlet air cooling increases the power output by taking advantage of the gas turbine’s feature of higher mass flow rate when the compressor inlet temperature decreases. This is precisely the reason why on hot days, when air is less dense, power output falls off. A rise of 1°C temperature of inlet air decreases the power output by 1%. In this paper the performance enhancement of gas turbine power plants by cooling the compressor intake air with an evaporative cooler is studied. This study investigated the effect of inlet air cooling system on the performance of an existing gas turbine power plant in Nigeria. The results show that for each 5oC decrease of inlet air temperature, net output power increases around 5-10% and the first and second law efficiencies increase around 2-5%. It is shown that the amount of this increase is higher when the pressure ratio is high and turbine inlet temperature is low. The results of this study shows that retrofitting of the existing gas turbine plant with inlet air cooling system gives a better system performance and may prove to be an attractive investment opportunity to the Nigeria government and stakeholders of the plant.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mr Solomon Bayoko
Date Deposited: 13 Jan 2014 11:07
Last Modified: 13 Jan 2014 11:07

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