Pusat Pengajian Kejuruteraan Mekanikal - Tesis

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Browsing Pusat Pengajian Kejuruteraan Mekanikal - Tesis by Author "B Navaneetha Krishnan"

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    Effect of ternary fuel blends of bio -ethanol / propanol, diesel and palm biodiesel on engine performance, emissions and combustion characteristics of a compression -ignition engine
    (2023-10-01)
    B Navaneetha Krishnan
    Malaysia, one of the key palm oil producers in the southeast Asian region, currently uses palm biodiesel mixed with diesel and it aims provide a higher palm biodiesel concentration in diesel fuel. Prior studies on biodiesel fueled compression ignition engines show a higher oxides of nitrogen emission formation when compared to engine operation with diesel fuel. In order to control this particular pollutant formation without any physical modifications to the powertrain, alcohol-based fuels such as ethanol and propanol can be added to the existing palm biodiesel – diesel fuel blend. The test was done on a Kirloaksar TV1 engine having rated power of 5.2 kW at 1500 rpm. The initial test phase was carried out using reference fuels such as Diesel, B100 and B40D60 and later continued with ethanol and propanol based ternary blends namely B40D50E10, B40D40E20 and B40D30E30 and B40D50P10, B40D40P20 and B40D30P30. Analysis of test results revealed that Diesel possessing the highest CV amongst all tested fuels resulted in giving the highest BTE value of 29.9% and in the case of alcohol based ternary blends, utilizing B40D50P10 and B40D50E10 as fuels were seen to result in 27.8% and 27.3% BTE respectively. Similar to the trend of BTE, fuelling CI engine using Diesel fuel gave CP of 71.91 bar which was observed to be the highest among the tested fuels. Using ternary blends B40D50E10 and B40D50P10 resulted in CP value of 69.29 bar and 69.80 bar which in comparison is lower than diesel but higher than ternary blends having more alcohol content. For the tested fuels, the trend for both BSCO and BSHC are observed to be similar and in it the lowest emission BSCO and BSHC values were observed for B100 at 0.132 g/kWh and 0.069 g/kWh respectively. Whereas for alcohol based ternary blends, the lowest BSCO and BSHC values were recorded for B40D50E10 at 0.131 g/kWh and 0.110 g/kWh while for B40D50P10 at 0.119 g/kWh and 0.100 g/kWh respectively. When comparing emission results obtained with ternary fuel blends, the lowest SM and BSNOX emissions value of 60.1% and 4.672 g/kWh for B40D30P30 and 63.6% and 4.504 g/kWh for B40D30E30 were recorded respectively. Among the ternary blends, the fuel type designated as B40D50P10 and B40D50E10 are seen to be more suitable for utilization in CI engines they show enhanced performance and lower emission characteristics in comparison to ternary fuel blend with higher alcohol concentration.