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Sustainability 2015, 7(9), 12236-12257; doi:10.3390/su70912236

Comparative Exergoeconomic Analyses of Gas Turbine Steam Injection Cycles with and without Fogging Inlet Cooling

1
Department of Mechanical Engineering, University of Ataturk, 25240 Erzurum, Turkey
2
Faculty of Mechanical Engineering, University of Tabriz, Tabriz 5166616471, Iran
3
Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON L1H 7K4, Canada
4
Institute for Energy Engineering, Technische Universität Berlin, Marchstr 18, 10587 Berlin, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Andrew Kusiak
Received: 28 July 2015 / Revised: 24 August 2015 / Accepted: 28 August 2015 / Published: 3 September 2015
(This article belongs to the Section Energy Sustainability)
View Full-Text   |   Download PDF [1517 KB, uploaded 3 September 2015]   |  

Abstract

The results are reported of exergoeconomic analyses of a simple gas turbine cycle without a fogging system (SGT), a simple steam injection gas turbine cycle (STIG), and a steam injection gas turbine cycle with inlet fogging cooler (FSTIG). The results show that (1) a gas-turbine cycle with steam injection and simultaneous cooling has a higher power output than the other considered cycle; (2) at maximum energy efficiency conditions the gas turbine has the highest exergy efficiency of the cycle components and the lowest value of exergy efficiency is calculated for the fog cooler, where the mixing of air and water at greatly different temperatures causes the high exergy destruction; and (3) utilization of the fogging cooler in the steam injection cycle increases the exergy destruction in the combustion chamber. Furthermore, the simple gas turbine cycle is found to be more economic as its relative cost difference, total unit product cost, and exergoeconomic factors are less than those for the two other configurations. However, its efficiency and net power output are notably lower than for the gas turbine with steam injection and/or fog cooling. The total unit product cost is highest for the simple gas turbine with steam injection. View Full-Text
Keywords: gas turbine; fog cooling; steam injection; exergy; exergoeconomic analysis gas turbine; fog cooling; steam injection; exergy; exergoeconomic analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Athari, H.; Soltani, S.; Rosen, M.A.; Mahmoudi, S.M.S.; Morosuk, T. Comparative Exergoeconomic Analyses of Gas Turbine Steam Injection Cycles with and without Fogging Inlet Cooling. Sustainability 2015, 7, 12236-12257.

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