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The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy

Agrebi, Senda ; Dreßler, Louis ; Nishad, Kaushal (2022):
The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy. (Publisher's Version)
In: Entropy, 24 (4), MDPI, e-ISSN 1099-4300,
DOI: 10.26083/tuprints-00021284,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy
Language: English
Abstract:

The entropy generation analysis of adiabatic combustion systems was performed to quantify the exergy losses which are mainly the exergy destroyed during combustion inside the chamber and in the exhaust gases. The purpose of the present work was therefore: (a) to extend the exergy destruction analysis by including the exhaust gas exergy while applying the hybrid filtered Eulerian stochastic field (ESF) method coupled with the FGM chemistry tabulation strategy; (b) to introduce a novel method for evaluating the exergy content of exhaust gases; and (c) to highlight a link between exhaust gas exergy and combustion emissions. In this work, the adiabatic Sandia flames E and F were chosen as application combustion systems. First, the numerical results of the flow and scalar fields were validated by comparison with the experimental data. The under-utilization of eight stochastic fields (SFs), the flow field results and the associated scalar fields for the flame E show excellent agreement contrary to flame F. Then, the different exergy losses were calculated and analyzed. The heat transfer and chemical reaction are the main factors responsible for the exergy destruction during combustion. The chemical exergy of the exhaust gases shows a strong relation between the exergy losses and combustion emission as well as the gas exhaust temperature.

Journal or Publication Title: Entropy
Volume of the journal: 24
Issue Number: 4
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 18 Seiten
Uncontrolled Keywords: Eulerian stochastic field method, FGM, entropy generation analysis, exhaust gases exergy, flames E and F
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute for Energy and Power Plant Technology (EKT)
16 Department of Mechanical Engineering > Institute of Reactive Flows and Diagnostics (RSM)
Date Deposited: 06 May 2022 11:15
Last Modified: 05 Oct 2022 12:41
DOI: 10.26083/tuprints-00021284
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-212845
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21284
PPN: 499838335
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