Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
BIOGAS-FUELED MICRO GAS TURBINE THERMODYNAMIC ANALYSIS
Submission Author:
Gustavo Sana Trindade , MG
Co-Authors:
Gustavo Sana Trindade, Luís Antônio Bortolaia, Elisangela Leal
Presenter: Gustavo Sana Trindade
doi://10.26678/ABCM.ENCIT2020.CIT20-0541
Abstract
The generation of electricity through biogas produced from municipal solid waste has become an effective option for diversification Brazilian electricity sector. Therefore, in order to ratify this trend, a thermodynamic analysis of a 100 kWe micro gas turbine using biogas as fuel are presented in this paper. In terms of methodology, a classic steady state thermodynamic model and parametric analysis were used to evaluate the equipment performance. Engineering Equation Solver Demo (EES) was the software used to run compressor, combustor, turbine and recuperator models. Besides the iterative calculation and the parametric graphic construction, it has the advantage of containing thermodynamic relationships for many fluids in its internal routines. A sensitivity analysis was performed by varying pressure ratio, turbine inlet temperature and compressor, turbine and recuperator efficiencies to quantify and compare important parameters such as thermal efficiency and specific fuel consumption and, thus, determine the best operation point. The results showed that the regenerative cycle has the highest efficiency at a turbine inlet temperature of 1200 K at a pressure ratio equal to 4 and compressor efficiency of 0.81, turbine efficiency of 0.84, and a 0.85 regenerator efficiency. The electrical efficiency obtained were on the range of 25% to 32%.
Keywords
micro gas turbine, Biogas, thermodynamic modeling, recuperator, electrical efficiency, Specific fuel consumption
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