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Gas turbine selection for hot windbox repowering on 200 MW fossil fuel power plant

Harutyunyan Artur, Badyda Krzysztof, Wołowicz Marcin, Milewski Jarosław

Journal of Power Technologies

2019

Vol. 99, nr 2

142--151

This paper focuses on and discusses the concept of hot windbox repowering in an existing steam cycle power plant. Using commercial software, for that process based on the fraction of oxygen in exhaust gases, nine different models of gas turbines were tested in power plant model with a fossil fuel boiler. Then thermodynamic analysis of the power plant model before and after hot windbox repowering was conducted. This work seeks to select the best fit gas turbine for hot windbox repowering for a 200 MW fossil fuel power plant and to gain a deeper understanding of the effect of hot windbox repowering. To this end nine models of gas turbines with different net electrical power (from 50 to 125 MW) were tested and General Electric production GE Energy Oil&Gas MS9001E SC (GTW 2009) 123 MW gas turbine was selected as the most suitable for the model of the power plant and, after repowering, the total power of the power plant rose to 398 MW. Calculations were performed in 2 stages: 1) calculation and comparison of the thermodynamic parameters as well as carbon dioxide emissions of power plant model before and after repowering with nine different gas turbines, 2) calculation of thermodynamic parameters of the combined cycle power plant model before and after repowering in values 100%, 90%, 80%, 70%, 60% of fossil fuel boiler heat loads.

The effect of parallel hot windbox repowering on 387 MW fossil fuel power plant

Harutyunyan A., Badyda K., Wołowicz M.

Transactions of the Institute of Fluid-Flow Machinery

2016

nr 131

79--95

The paper presents the concept of repowering in existing power plant. Among technologies for existing steam power plants, the hot windbox repowering is the fastest way to respond to the energy demand, improve efficiency and reduce the pollutants emissions. Thermodynamic analysis of power plant model with fossil boiler before and after hot windbox repowering, has been investigated using commercial software. The purpose of this work is to understand and analyze the effect of hot windbox repowering on 387 MW fossil fuel power plant as well as the effect of additional heat exchangers, which have been installed parallel with regeneration system to use the heat of boiler exhaust gases. In this way, after repowering the summary power of power plant in base load is 615 MW, which has been reached adding gas turbine (176.9 MW). To analyze the model, calculations were performed in 3 stages: 1) calculation and comparison of the thermodynamic parameters as well as carbon dioxide emissions of power plant model before and after repowering, 2) analysis of the optimal value of feed water mass flow through heat exchangers installed after economizer, 3) calculation of thermodynamic parameters in values 100%, 90%, 80% and 75% of fossil boiler heat loads.