Subramaniam Dhanakotti | Anna University (original) (raw)

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Papers by Subramaniam Dhanakotti

Journal of Renewable and Sustainable Energy, 2013

ABSTRACT In this article, an endeavor has been made to assess the operating characteristics of a ... more ABSTRACT In this article, an endeavor has been made to assess the operating characteristics of a diesel engine fuelled with methyl esters of pungamia, ethyl esters of pungamia, and ethyl esters of neem, added to diesel by percentage volume ranging from B20 to B80. The test runs on diesel fuel in the first phase of work were carried out under standard injection timing of 23° before top dead center (BTDC), so as to establish baseline for other parameters. The similar test procedures were repeated with an advanced injection timings of 26° BTDC and 28° BTDC fuelled with diesel and biodiesel–diesel blends varying from B20 to B100. Experimental results proved that the 3° advancement of injection timing from the standard injection timing proved promising outcomes for biodiesel operated engine, whereas 5° BTDC crank angle degree produced a higher exhaust gas temperature and higher levels of NOx formation.

Journal of Renewable and Sustainable Energy, 2012

In this experimental study, performance, emissions, and combustion characteristics of methyl/ethy... more In this experimental study, performance, emissions, and combustion characteristics of methyl/ethyl esters of pongamia, ethyl esters of neem and diesel blends in a diesel engine were experimentally investigated. For this study, methyl esters of pongamia, ethyl esters of pongamia, and ethyl esters of neem were added to diesel by volume of 20% (B20), 40% (B40), 60% (B60) and 80% (B80), as well as pure blend (B100). Fuels were tested in single cylinder, water-cooled, direct injection kirloskar diesel engine loaded by eddy current dynamometer. The effect of blends on engine performance, exhaust emissions, and combustion were examined at different loads. It was clear, up to 40% of methyl/ethyl ester did not affect the brake thermal efficiency. On the other hand, HC emission decreased by 1.3% for B40 in comparison with base diesel operation in engine. At the same time, smoke emissions were also reduced by 1.2% compared to diesel engine fuelled with B40 blend. It was proved that B40 is a best blend ratio compared to B60, B80, and B100. The overall combustion characteristics of B40 bio diesel were similar to base diesel. The maximum cylinder pressure for B40 bio diesel was slightly less compared to maximum cylinder pressure of base diesel at the same operating condition. The heat release rate and cumulative heat release rate are higher for base diesel compared to B40 bio diesel operating at full load condition.

Renewable and Sustainable Energy Reviews, 2013

International Journal of Ambient Energy, 2013

International Journal of Ambient Energy, 2013

ABSTRACT All these years, several studies have been carried out to find feasible, viable and domi... more ABSTRACT All these years, several studies have been carried out to find feasible, viable and dominant alternate source to fossil fuels, with the primary interest of enhancing engine performance and reducing exhaust tail pipe emissions. The present work enumerates the performance and emission characteristics of low-heat rejection engine (LHRE) coated with the alumina–zirconia (Al2O3–ZrO2) composite. Experimental results proved improvement in brake thermal efficiency, brake-specific fuel consumption and well-to-wheel reduction of carbon monoxide, hydrocarbon and smoke emission for coated engine (CE) in comparison with uncoated engine (UCE). Neat diesel, new high-potential punnai methyl ester and its diesel blends were used as test fuels. However, in the experimental study, oxides of nitrogen increased for CE than UCE.

Journal of Renewable and Sustainable Energy, 2013

ABSTRACT In this article, an endeavor has been made to assess the operating characteristics of a ... more ABSTRACT In this article, an endeavor has been made to assess the operating characteristics of a diesel engine fuelled with methyl esters of pungamia, ethyl esters of pungamia, and ethyl esters of neem, added to diesel by percentage volume ranging from B20 to B80. The test runs on diesel fuel in the first phase of work were carried out under standard injection timing of 23° before top dead center (BTDC), so as to establish baseline for other parameters. The similar test procedures were repeated with an advanced injection timings of 26° BTDC and 28° BTDC fuelled with diesel and biodiesel–diesel blends varying from B20 to B100. Experimental results proved that the 3° advancement of injection timing from the standard injection timing proved promising outcomes for biodiesel operated engine, whereas 5° BTDC crank angle degree produced a higher exhaust gas temperature and higher levels of NOx formation.

Journal of Renewable and Sustainable Energy, 2012

In this experimental study, performance, emissions, and combustion characteristics of methyl/ethy... more In this experimental study, performance, emissions, and combustion characteristics of methyl/ethyl esters of pongamia, ethyl esters of neem and diesel blends in a diesel engine were experimentally investigated. For this study, methyl esters of pongamia, ethyl esters of pongamia, and ethyl esters of neem were added to diesel by volume of 20% (B20), 40% (B40), 60% (B60) and 80% (B80), as well as pure blend (B100). Fuels were tested in single cylinder, water-cooled, direct injection kirloskar diesel engine loaded by eddy current dynamometer. The effect of blends on engine performance, exhaust emissions, and combustion were examined at different loads. It was clear, up to 40% of methyl/ethyl ester did not affect the brake thermal efficiency. On the other hand, HC emission decreased by 1.3% for B40 in comparison with base diesel operation in engine. At the same time, smoke emissions were also reduced by 1.2% compared to diesel engine fuelled with B40 blend. It was proved that B40 is a best blend ratio compared to B60, B80, and B100. The overall combustion characteristics of B40 bio diesel were similar to base diesel. The maximum cylinder pressure for B40 bio diesel was slightly less compared to maximum cylinder pressure of base diesel at the same operating condition. The heat release rate and cumulative heat release rate are higher for base diesel compared to B40 bio diesel operating at full load condition.

Renewable and Sustainable Energy Reviews, 2013

International Journal of Ambient Energy, 2013

International Journal of Ambient Energy, 2013

ABSTRACT All these years, several studies have been carried out to find feasible, viable and domi... more ABSTRACT All these years, several studies have been carried out to find feasible, viable and dominant alternate source to fossil fuels, with the primary interest of enhancing engine performance and reducing exhaust tail pipe emissions. The present work enumerates the performance and emission characteristics of low-heat rejection engine (LHRE) coated with the alumina–zirconia (Al2O3–ZrO2) composite. Experimental results proved improvement in brake thermal efficiency, brake-specific fuel consumption and well-to-wheel reduction of carbon monoxide, hydrocarbon and smoke emission for coated engine (CE) in comparison with uncoated engine (UCE). Neat diesel, new high-potential punnai methyl ester and its diesel blends were used as test fuels. However, in the experimental study, oxides of nitrogen increased for CE than UCE.