THERMAL SCIENCE

International Scientific Journal

Yunyun Wang

,

Jiang Liu

,

Luyu Wang

,

Zaiguo Fu

,

Peifen Weng

THERMAL CALCULATIONS AND NOX EMISSION ANALYSIS OF A MICRO GAS TURBINE SYSTEM WITHOUT A RECUPERATOR

ABSTRACT
A thermal calculation based on a table of thermal properties of gas was carried out for a micro gas turbine system without a recuperator. The performance parameters of the micro gas turbine system were obtained. The results of the thermal calculations were verified using ASPEN PLUS, and it shows that the thermal calculations fit well with the ASPEN simulation results. Based on this thermal calculation method, the variation of the performance parameters of the micro gas turbine system under different pressure and temperature ratios was analyzed. The results show that there is no optimum pressure ratio within the general design parameters of micro gas turbines, which leads to extreme values of thermal efficiency. The NOx generation in the combustion chamber of the micro gas turbine based on the Zeldovich mechanism was modeled and analyzed by coupling the 1-D thermal calculation model with the NOx emission model. The relationship between NOx generation rate, molar fuel factor, the characteristic pressure, and the characteristic temperature was obtained. The results of the analysis show that, in terms of controlling NOx emissions from a gas turbine, the use of an increased pressure ratio has a significant advantage over an increased temperature ratio to improve the thermal efficiency of the micro gas turbine.
KEYWORDS
micro gas turbine, Thermal calculations, NOx emissions, Characteristic pressure, Characteristic temperature
PAPER SUBMITTED: 2021-06-01
PAPER REVISED: 2021-09-09
PAPER ACCEPTED: 2021-09-28
PUBLISHED ONLINE: 2021-12-04
DOI REFERENCE: https://doi.org/10.2298/TSCI210601336W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 5, PAGES [3817 - 3829]
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Thermal calculations and NOx emission analysis of a micro gas turbine system without a recuperator

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence