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Experimental Characterization of the Combustion in Fuel Flexible Humid Power Cycles

Dybe, Simeon and Guethe, Felix and Bartlett, Michael and Stathopoulos, Panagiotis and Paschereit, Christian Oliver (2021) Experimental Characterization of the Combustion in Fuel Flexible Humid Power Cycles. Turbo Expo: Power for Land, Sea, and Air, Volume. doi: 10.1115/GT2021-58675.

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Official URL: https://doi.org/10.1115/GT2021-58675


Modified humid power cycles provide the necessary boundary condition for combustion to operate on a wide fuel spectrum in a steam-rich atmosphere comprising hydrogen and syngas from gasification besides natural gas as fuels. Thus, these cycles with their high efficiency and flexibility fit in a carbon-free energy market dominated by renewable electricity generation, providing dispatchable heat and electric power.To realize their full potential, the combustor utilized in such power cycles must fulfill the emission limits as well as demands of stable combustion over a wide range of fuel and steam ratios. The operation is limited by the risk of lean blowout for highly diluted syngas with low reactivity, and flashback for highly reactive hydrogen. Further, the gasification product gas can contain unwanted pollutants such as tars and nitrogen containing species like ammonia (NH3). Tars carry a considerable portion of the feedstock’s energy but are associated with detrimental operational behavior. The presence of ammonia in the combustion increases the risk of high NOx-emission at already small ammonia concentrations in the fuel.In this work, humid hydrogen flames are analyzed for their stability and emissions. Stable hydrogen flames were produced over a wide equivalence ratio and steam ratio range at negligible NOx-emissions.Further, natural gas, and a fuel blend substituting bio-syngas, was doped with ammonia. The combustion is analyzed with a focus on emissions and flame position and stability. The addition of ammonia causes high NOx-formation from fuel bound nitrogen (FBN), which highly increases NOx-emissions. The latter decrease with increasing NH3 content and increasing equivalence ratio.

Item URL in elib:https://elib.dlr.de/147765/
Document Type:Book
Additional Information:V03AT04A012
Title:Experimental Characterization of the Combustion in Fuel Flexible Humid Power Cycles
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Series Name:Turbo Expo: Power for Land, Sea, and Air
Keywords:Combustion, Experimental characterization, Fuels, Thermodynamic power cycles, Emissions, Hydrogen, Nitrogen oxides, Flames, Steam, Syngas, Fuel gasification, Natural gas, Nitrogen, Risk, Stability, Tar, Boundary-value problems, Carbon, Combustion chambers, Cycles, Electric power generation, Electricity (Physics), Heat, Pollution
HGF - Research field:Energy
HGF - Program:Energy System Design
HGF - Program Themes:Digitalization and System Technology
DLR - Research area:Energy
DLR - Program:E SY - Energy System Technology and Analysis
DLR - Research theme (Project):E - Energy System Technology, E - Gas Turbine
Location: Cottbus
Institutes and Institutions:Institute of Low-Carbon Industrial Processes
Deposited By: Stathopoulos, Panagiotis
Deposited On:17 Dec 2021 16:57
Last Modified:21 Dec 2021 13:07

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