A technical-economic analysis of turbine inlet air cooling for a heavy duty gas turbine operating with blast-furnace gas

Authors

DOI:

https://doi.org/10.33448/rsd-v10i9.15006

Keywords:

Gas turbine; Blast furnace gas (BFG); Electricity generation; Combined cycle; Steelworks; Turbine Inlet Air Cooling (TIAC).

Abstract

The study was developed inside an integrated steel mill, located in Rio de Janeiro city, aiming to analyse the technical-economic feasibility of installing a new inlet air refrigeration system for the gas turbines. The technologies applied for such purpose are named Turbine Inlet Air Cooling (TIAC) technologies. The power plant utilizes High Fogging and Evaporative Cooling methods for reducing the compressor’s inlet air temperature, however, the ambient climate condition hampers the turbine’s power output when considering its design operation values. Hence, this study was proposed to analyse the installation of an additional cooling system. The abovementioned power plant has two heavy-duty gas turbines and one steam turbine, connected in a combined cycle configuration. The cycle nominal power generation capacity is 450 MW with each of the gas turbines responsible for 90 MW. The gas turbines operate with steelwork gases, mainly blast furnace gas (BFG), and natural gas. The plant has its own weather station, which provided significant and precise data regarding the local climate conditions over the year of 2017. An in-house computer model was created to simulate the gas turbine power generation and fuel consumption considering both cases: with the proposed TIAC system and without it, allowing the evaluation of the power output increase due to the new refrigeration system. The results point out for improvements of 4.22% on the power output, corresponding to the electricity demand of approximately 32960 Brazilian homes per month or yearly earnings of 3.92 million USD.

Author Biographies

Júlio Cesar Costa Campos, Federal University of São João Del Rei

Postgraduate Program in Energy Engineering - Federal University of São João Del Rei - UFSJ

Thermal Systems Laboratory, Department of Mechanical Engineering,

Federal University of Viçosa - UFV, Viçosa, MG, Brazil

Rogerio Fernandes Brito, Federal University of Itajubá

Possui graduação em Engenharia Mecânica pela Universidade Federal de Itajubá (1994), mestrado em Engenharia Mecânica pela Universidade Federal de Itajubá (1999) e doutorado em Engenharia Mecânica pela Universidade Federal de Itajubá (2005). Atualmente é pesquisador da Universidade Federal de Viçosa e professor adjunto, classe 6 nível 604 da Universidade Federal de Itajubá. Tem experiência na área de Engenharia Mecânica, com ênfase em Transferência de Calor, atuando principalmente nos seguintes temas: análise térmica, transferência de calor e métodos numéricos. ORCID: https://orcid.org/0000-0002-6833-7801

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Published

29/07/2021

How to Cite

COSTA, R. C. da .; SILVA JR., C. A. A. e .; CAMPOS, J. C. C. .; BOHORQUEZ, W. O. I. .; BRITO, R. F.; SIQUEIRA, A. M. . A technical-economic analysis of turbine inlet air cooling for a heavy duty gas turbine operating with blast-furnace gas. Research, Society and Development, [S. l.], v. 10, n. 9, p. e59810915006, 2021. DOI: 10.33448/rsd-v10i9.15006. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/15006. Acesso em: 20 sep. 2021.

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Engineerings