In this study, the influence of the charge motion on the internal combustion in a spark ignition sewage gas-driven engine (150 kW) for combined heat and power (CHP) units was investigated. For this purpose, the geometry of the combustion chamber in the immediate vicinity to the inlet valve seats was modified. The geometrical modification measures were conducted iteratively by integrative determination of the swirl motion on a flow bench, by laser-optical methods and consecutively by combustion analysis on a test engine. Two different versions of cylinder heads were characterized by dimensionless flow and swirl numbers prior to testing their on-engine performance. Combustion analysis was conducted with a cylinder pressure indication system for partial and full load, meeting the mandatory NOx limit of 500 mg m−3. Subsuming the flow bench results, the new valve seat design has a significant enhancing impact on the swirl motion but it also leads to disadvantages concerning the volumetric efficiency. A comparative consideration of the combustion rate delivers that the increased swirl motion results in a faster combustion, hence in a higher efficiency. In summary, the geometrical modifications close to the valve seat result in increased turbulence intensity. It was proven that this intensification raises the ratio of efficiency by 1.6%.
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October 2018
Research-Article
Optimization of the Charge Motion in Internal Combustion Engines Driven by Sewage Gas for Combined Heat and Power Units
Lucas Konstantinoff,
Lucas Konstantinoff
Department of Technology and Life Sciences,
Engines and Emissions,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lucas.konstantinoff@mci.edu
Engines and Emissions,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lucas.konstantinoff@mci.edu
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Lukas Möltner,
Lukas Möltner
Professor
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lukas.moeltner@mci.edu
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lukas.moeltner@mci.edu
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Martin Pillei,
Martin Pillei
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
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Thomas Steiner,
Thomas Steiner
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
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Thomas Dornauer,
Thomas Dornauer
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
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Günther Herdin,
Günther Herdin
CEO
PGES GmbH,
Jenbach 6200, Tirol, Austria
PGES GmbH,
Jenbach 6200, Tirol, Austria
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Dominik Mairegger
Dominik Mairegger
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Lucas Konstantinoff
Department of Technology and Life Sciences,
Engines and Emissions,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lucas.konstantinoff@mci.edu
Engines and Emissions,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lucas.konstantinoff@mci.edu
Lukas Möltner
Professor
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lukas.moeltner@mci.edu
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
e-mail: lukas.moeltner@mci.edu
Martin Pillei
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Thomas Steiner
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Thomas Dornauer
Department of Technology and Life Sciences,
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Management Center Innsbruck,
Innsbruck 6020, Tirol, Austria
Günther Herdin
CEO
PGES GmbH,
Jenbach 6200, Tirol, Austria
PGES GmbH,
Jenbach 6200, Tirol, Austria
Dominik Mairegger
1Corresponding author.
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received March 1, 2018; final manuscript received March 2, 2018; published online June 19, 2018. Editor: David Wisler.
J. Eng. Gas Turbines Power. Oct 2018, 140(10): 102805 (8 pages)
Published Online: June 19, 2018
Article history
Received:
March 1, 2018
Revised:
March 2, 2018
Citation
Konstantinoff, L., Möltner, L., Pillei, M., Steiner, T., Dornauer, T., Herdin, G., and Mairegger, D. (June 19, 2018). "Optimization of the Charge Motion in Internal Combustion Engines Driven by Sewage Gas for Combined Heat and Power Units." ASME. J. Eng. Gas Turbines Power. October 2018; 140(10): 102805. https://doi.org/10.1115/1.4039756
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