International policies aiming at keeping global warming within safety limits will strongly impact gas-fired power plants. Flexibility is going to be the key-word, hence this paper focuses on possible strategies to increase turndown capability (i.e. lowering Minimum Environmental Load (MEL)) of open and combined cycle power plants (CCPP) through retrofittable compressor service packages. In particular, the following three options have been analyzed: extra-closure of Variable Inlet Guide Vanes (IGVs), Blow-Off (BO) lines opening and inlet bleed heating. All these solutions aim at reducing the compressor outlet mass-flow rate while keeping a safe stability margin. The effect of lowering the minimum load capability by opening the BO lines has been numerically investigated through full compressor 2D throughflow analyses. Moreover, the impact on compressor performance and stability of the extra-closure of IGVs has been analyzed with the support of 3D steady-state CFD modelling. Finally, the overall performance of the power-plant has been included and discussed in order to provide plant managers with a solid starting point for a techno-economic analysis.

Compressor Retrofittable Solutions in Heavy-Duty Gas Turbines for Minimum Environmental Load Reduction / Mosele, Stefano Gino; Garbarino, Tiziano; Schneider, Andrea; Cozzi, Lorenzo; Arnone, Andrea; Goinis, Georgios; Hedkvist, Simon. - In: E3S WEB OF CONFERENCES. - ISSN 2267-1242. - ELETTRONICO. - 113:(2019), pp. 0-0. (Intervento presentato al convegno SUPEHR19 SUstainable PolyEnergy generation and HaRvesting tenutosi a Savona, Italy nel September 4-6, 2019) [10.1051/e3sconf/201911301012].

Compressor Retrofittable Solutions in Heavy-Duty Gas Turbines for Minimum Environmental Load Reduction

Cozzi, Lorenzo;Arnone, Andrea;
2019

Abstract

International policies aiming at keeping global warming within safety limits will strongly impact gas-fired power plants. Flexibility is going to be the key-word, hence this paper focuses on possible strategies to increase turndown capability (i.e. lowering Minimum Environmental Load (MEL)) of open and combined cycle power plants (CCPP) through retrofittable compressor service packages. In particular, the following three options have been analyzed: extra-closure of Variable Inlet Guide Vanes (IGVs), Blow-Off (BO) lines opening and inlet bleed heating. All these solutions aim at reducing the compressor outlet mass-flow rate while keeping a safe stability margin. The effect of lowering the minimum load capability by opening the BO lines has been numerically investigated through full compressor 2D throughflow analyses. Moreover, the impact on compressor performance and stability of the extra-closure of IGVs has been analyzed with the support of 3D steady-state CFD modelling. Finally, the overall performance of the power-plant has been included and discussed in order to provide plant managers with a solid starting point for a techno-economic analysis.
2019
SUPEHR19 SUstainable PolyEnergy generation and HaRvesting Volume 1
SUPEHR19 SUstainable PolyEnergy generation and HaRvesting
Savona, Italy
September 4-6, 2019
Goal 7: Affordable and clean energy
Mosele, Stefano Gino; Garbarino, Tiziano; Schneider, Andrea; Cozzi, Lorenzo; Arnone, Andrea; Goinis, Georgios; Hedkvist, Simon
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1169972
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