Person:
YILMAZ, İLKER TURGUT

Profile Picture

Email Address

Birth Date

Research Projects

Organizational Units

OrgUnit Logo
Organizational Unit

Job Title

Last Name

YILMAZ

First Name

İLKER TURGUT

Name

Filters

2017 - 201922020 - 20212
Reset filters

Settings

Subject: Biogas ×

Search Results

Now showing 1 - 4 of 4
  • Thumbnail Image
    PublicationOpen Access
    The effect of diesel fuel amount on emissions in a diesel-biogas dual fueled engine
    (PAMUKKALE UNIV, 2020) YILMAZ, İLKER TURGUT; Yilmaz, Ilker Turgut; Yavuz, Mustafa; Gumus, Metin
    Fossil fuels generally meet the energy demand of internal combustion engines. Due to the run out fossil fuels day by day, renewable energy sources catch the researchers' attentions. Biogas is a renewable alternative fuel produced from organic wastes. In this paper, the effect of diesel fuel amount on the exhaust emissions of the biogas-diesel dual fuel engine was investigated. Experiments were carried out on a four stroke, four cylinder, water cooled, turbocharged, common-rail diesel engine. No changes were made on original settings of electronic control unit of the engine. The energy demands of dual fuel engine were supplied by diesel fuel about 20%, 30%, 40% and 50%. All tests were conducted at 1750 rpm constant speed, 40 Nm, 60 Nm and 80 Nm engine loads. Depending on increasing diesel fuel amount HC, CO2 and NOx emissions decreased but soot emissions raised. The increase in the amount of biogas sent to the cylinders increased both the amount of fuel burned in the premixed combustion phase and the NOx emissions. The CO2 contained in the biogas increased HC and soot emissions by diluting the fuel-air mixture.
  • No Thumbnail Available
    PublicationMetadata only
    Investigation of combustion and emission characteristics in a TBC diesel engine fuelled with CH4-CO2-H-2 mixtures
    (PERGAMON-ELSEVIER SCIENCE LTD, 2021) YILMAZ, İLKER TURGUT; Sanli, Ali; Yilmaz, Ilker Turgut; Gumus, Metin
    In this study, an experimental investigation was performed to reveal combustion and emission characteristics of common-rail four-cylinder diesel engine run with CH4, CO2 and H-2 mixtures. The engine pistons were thermally coated with zirconia and Ni-Al bond coat by plasma spray method. With a small amount of the pilot diesel, port fuelled methane (100% CH4), synthetic biogas (80% CH4 + 20% CO2), and hydrogen presented (80% CH4+10% CO2+10% H-2) mixtures were used as main fuel at different loads (50 Nm, 75 Nm, and 100 Nm) at a constant speed of 1750 min(-1). Comparative analysis of the combustion (cylinder pressure, PRR, HRR, CHR, ringing intensity, CA10, CA50, and CA90), BSFC, and emissions (CO2, HC, NOx, smoke, and oxygen) at the various engine loads with and without piston coating was made for all fuel combinations. It was found that coating the engine pistons enhanced the examining combustion characteristics, whereas it slightly changed BSFC and most of the emissions. As compared to the sole diesel fuel, the gaseous fuel operations showed higher in-cylinder pressure, PRR, and ringing intensity values, earlier combustion starting and CAs, and lower diesel injection pressure at the same engine operating conditions. Dramatic increase in the ringing intensity was particularly found by the hydrogen introduced mixture under the tests with coated piston. HC and CO2 emissions increased in operation with the synthetic biogas; however, hydrogen introduction reduced HC emissions by 4.97-30.92%, and CO2 emissions by 5.16-10%. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
  • Thumbnail Image
    PublicationOpen Access
    A research on biogas-diesel dual fuel diesel engine
    (GAZI UNIV, FAC ENGINEERING ARCHITECTURE, 2017-09-07) YILMAZ, İLKER TURGUT; Yilmaz, Ilker Turgut; Gumus, Metin
    In the present study, cylinder pressures, brake specific fuel consumptions and exhaust emissions of a dual fuel diesel engine used biogas (% 60 CH4-% 40 CO2) as main fuel was examined experimentally. Experiments were conducted at 1750 rpm under 50 Nm, 75 Nm and 100 Nm loads. Results showed that biogas could be used in diesel engines for reducing soot emissions. HC emissions and maximum cylinder pressures increased for all engine loads with using biogas in diesel engine. NOx emission decreased at low engine load but increased depending on the rise of engine load. The modifications such as adjusting injection timing, decreasing compression ratio and using different lubrication oils can be used for not only increasing performance but also lowering exhaust emissions of a biogas-diesel dual fuel engine.
  • No Thumbnail Available
    PublicationMetadata only
    Investigation of the effect of biogas on combustion and emissions of TBC diesel engine
    (ELSEVIER SCI LTD, 2017) YILMAZ, İLKER TURGUT; Yilmaz, I. T.; Gumus, M.
    In this study, the effect of biogas on the thermal barrier coated (TBC) dual-fuel engine was experimentally investigated. Experiments were carried out on a four cylinder, water cooled, turbocharged, common-rail coated and uncoated diesel engine under dual-fuel (biogas-diesel) mode and single fuel (neat diesel) mode. Combustion chambers of the pistons were coated with 400 mu m thickness 8% yttria stabilized zirconia main coat over a 100 mu m thickness Ni-Al bond coat using atmospheric plasma spray method. Combustion (cylinder gas pressure, rate of pressure rise), heat release (rate of heat release, cumulative heat release, duration and center of heat release) exhaust emission (HC, NOx and smoke emissions) parameters were investigated. Results showed that homogenous mixture of gaseous fuel and air caused high cylinder pressures. TBC can be used for decreasing smoke emissions under dual-fuel (biogas-diesel) mode. TBC had not a significant effect on NOx emission of single fuel mode. (C) 2016 Elsevier Ltd. All rights reserved.