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Erschienen in: Arabian Journal for Science and Engineering 12/2021

07.06.2021 | Research Article-Mechanical Engineering

Numerical Analysis of the Combustion in Micro Gas Turbine with Methane/Biogas Fuels

verfasst von: Xiaoyu Chen, Weiguo Zhou, Yunfei Jia, Junying Tang

Erschienen in: Arabian Journal for Science and Engineering | Ausgabe 12/2021

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Abstract

Replacing natural gas with the environmentally sustainable biogas is a promising way to reduce the usage of fossil fuels and promote organic waste utilization. Micro gas turbine (MGT), as a common power supply machine, is capable of adopting biogas as the fuel. Given the different intrinsic components between natural gas and biogas, combustion performance of biogas in MGT was studied in this work. The effects of fuel composition and excess air coefficient on combustion performance were analyzed through three-dimensional numerical simulation of the MGT combustor. RNG k-ε turbulent model, eddy-dissipation/finite rate model, and eight-step reaction mechanism were adopted in the simulation. The results showed that when the CO2 percentage in biogas increases, the NO and CO emissions decreases. However, the fuel rate and pressure drop of combustion chamber increases to maintain constant thermal input. The overall high velocity also increases the requirement for materials of combustion chamber. Furthermore, the average temperature of whole combustor decreases when the excess air coefficient increases. Accordingly, the CO2 mole fraction in biogas should be controlled below 30% and the optimal range of the excess air coefficient is 2–2.5 for the MGT.

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Metadaten
Titel
Numerical Analysis of the Combustion in Micro Gas Turbine with Methane/Biogas Fuels
verfasst von
Xiaoyu Chen
Weiguo Zhou
Yunfei Jia
Junying Tang
Publikationsdatum
07.06.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
Arabian Journal for Science and Engineering / Ausgabe 12/2021
Print ISSN: 2193-567X
Elektronische ISSN: 2191-4281
DOI
https://doi.org/10.1007/s13369-021-05731-3

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