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Heat transfer measurements in a hydrogen-oxyfuel combustor

Tanneberger, Tom and Stathopoulos, Panagiotis (2020) Heat transfer measurements in a hydrogen-oxyfuel combustor. Experimental Heat Transfer. Taylor & Francis. doi: 10.1080/08916152.2020.1798564. ISSN 0891-6152.

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Abstract

In the context of emission-free electricity generation, the authors developed a novel hydrogen-oxygen combustor, which is based on swirl-stabilized combustion technology and steam dilution. Following previous burner characterization, the current study investigates the heat transfer conditions in the combustion chamber wall. To this end, a carefully controlled co-flow of air is used to cool the combustion chamber in an annular duct, which surrounds it. Temperature measurements enable the evaluation of the heat flux from the combustor flow to the walls, local wall temperatures, and the Nusselt numbers on the hot and the cold side. The extremely high wall temperatures, caused by the H2/O2 flame, can be reduced by steam dilution down to approximately 900 K. Even better cooling could be reached by using the dilution steam as the coolant before it flows to the plenum. The Nusselt numbers at the inner combustion chamber wall are in the order of 10–50 and increase with the thermal power and the steam dilution ratio.

Item URL in elib:https://elib.dlr.de/139565/
Document Type:Article
Title:Heat transfer measurements in a hydrogen-oxyfuel combustor
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tanneberger, TomChair of Fluid Dynamics (Herman-Föettinger-Institut), Technische Universität Berlin, GermanyUNSPECIFIED
Stathopoulos, PanagiotisPanagiotis.Stathopoulos (at) dlr.deUNSPECIFIED
Date:21 August 2020
Journal or Publication Title:Experimental Heat Transfer
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1080/08916152.2020.1798564
Publisher:Taylor & Francis
ISSN:0891-6152
Status:Published
Keywords:Heat transfer, oxy-fuel combustion, hydrogen, steam dilution
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Other
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Low-Carbon Industrial Processes (old)
Location: Cottbus
Institutes and Institutions:Institute of Low-Carbon Industrial Processes
Deposited By: Klinkmüller, Maike
Deposited On:04 Jan 2021 11:02
Last Modified:04 Jan 2021 11:02

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