Title: Environmental impact and cost analysis of gas turbine cycles with steam injection and inter-stage turbine reheat

Authors: Hasan Kayhan Kayadelen; Yasin Ust; Veysi Bashan

Addresses: Department of Marine Engineering Operations, Faculty of Naval Architecture and Maritime, Yildiz Technical University, Istanbul 34349, Turkey ' Department of Naval Architecture and Marine Engineering, Faculty of Naval Architecture and Maritime, Yildiz Technical University, Istanbul 34349, Turkey ' Department of Naval Architecture and Marine Engineering, Faculty of Naval Architecture and Maritime, Yildiz Technical University, Istanbul 34349, Turkey

Abstract: Inter-stage turbine reheat is an effective gas turbine retrofit which can easily be used with simple and steam injected gas turbines as well. Owing to the uncertainties relating to an efficiency comparison of steam injected and no-injection cycle designs, thermoeconomics and environmental impacts have been considered to evaluate reheat and steam injection which regards pollutant emissions and environmental costs together. Being the complemental of the authors previous studies on steam injected gas turbines, simple, reheat, steam injected (STIG) and reheat steam injected (RHSTIG) gas turbine cycles are compared. Economic feasibility of steam injection as well as inter-stage turbine reheat are discussed according to 2018 plant cost data. Optimal cycle parameters are determined using a new comprehensive cycle model which permits to work with realistic working fluids, simulates the combustion process regarding 14 exhaust species and determines NO_x and CO emissions.

Keywords: gas turbines; reheat; steam injection; emissions; environmental impact; thermoeconomic analysis.

DOI: 10.1504/IJGW.2020.109249

International Journal of Global Warming, 2020 Vol.21 No.4, pp.356 - 372

Received: 28 Aug 2019
Accepted: 10 Feb 2020
Published online: 02 Sep 2020 *

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