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Effects of Gas Turbine's Regulation Modes on Off-Design Performance of IGCC

Wang Ying

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Abstract

The model of 200 MW integrated gasification combined cycle(IGCC) system was established by the software ThermoFlex for choosing reasonable gas turbine's regulation mode.Effects of gas turbine's regulation modes on off-design performance of gas top cycle system,steam bottom system and whole IGCC system were compared and studied from the point of system.Results show that adjusting compressor inlet guide vanes(IGV) angle makes for improving off-design performance of system.The closed IGV angle while using regulation mode for keeping turbine inlet temperature(T3) constant is smaller than while using regulation mode for keeping gas turbine exhaust temperature(T4) constant.Although system efficiency while using regulation modes for keeping T3 constant is little higher than while using regulation mode for keeping T4 constant,main steam temperature easily appears severe exceeding temperature,so regulation mode for keeping T4 constant is optimal.

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What this paper is about

The model of 200 MW integrated gasification combined cycle(IGCC) system was established by the software ThermoFlex for choosing reasonable gas turbine's regulation mode.Effects of gas turbine's regulation modes on off-design performance of gas top cycle system,steam bottom system and whole IGCC system were compared and studied from the point of system.Results show that adjusting compressor inlet guide vanes(IGV) angle makes for improving off-design performance of system.The closed IGV angle while using regulation mode for keeping turbine inlet temperature(T3) constant is smaller than while using regulation mode for keeping gas turbine exhaust temperature(T4) constant.Although system efficiency while using regulation modes for keeping T3 constant is little higher than while using regulation mode for keeping T4 constant,main steam temperature easily appears severe exceeding temperature,so regulation mode for keeping T4 constant is optimal.

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Available abstract

The model of 200 MW integrated gasification combined cycle(IGCC) system was established by the software ThermoFlex for choosing reasonable gas turbine's regulation mode.Effects of gas turbine's regulation modes on off-design performance of gas top cycle system,steam bottom system and whole IGCC system were compared and studied from the point of system.Results show that adjusting compressor inlet guide vanes(IGV) angle makes for improving off-design performance of system.The closed IGV angle while using regulation mode for keeping turbine inlet temperature(T3) constant is smaller than while using regulation mode for keeping gas turbine exhaust temperature(T4) constant.Although system efficiency while using regulation modes for keeping T3 constant is little higher than while using regulation mode for keeping T4 constant,main steam temperature easily appears severe exceeding temperature,so regulation mode for keeping T4 constant is optimal.

Key concepts: Integrated gasification combined cycle, Gas compressor, Combined cycle, Gas turbines, Constant (computer programming), Engineering, Turbomachinery, Turbine

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Effects of Gas Turbine's Regulation Modes on Off-Design Performance of IGCC — Research Paper | ScholarLens