Investigation of combustion and emission characteristics in a TBC diesel engine fuelled with CH4–CO2–H2 mixtures
| Autor: | Metin Gümüş, Ali Şanlı, Ilker Turgut Yilmaz |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Combustion Diesel engine 01 natural sciences Methane 0104 chemical sciences law.invention Brake specific fuel consumption Piston chemistry.chemical_compound Diesel fuel Fuel Technology chemistry law 0210 nano-technology NOx |
| Zdroj: | International Journal of Hydrogen Energy. 46:24395-24409 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2021.05.014 |
| Popis: | 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 H2 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% H2) 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%. |
| Databáze: | OpenAIRE |
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