Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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Author: search.filters.author.Dinesha, P.

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    Experimental investigations on the performance and emission characteristics of single cylinder CI engine fueled with cardanol - Diesel - Methanol blends
    (Korean Society of Combustion, 2013) Dinesha, P.; Mohanan, P.
    In this study, non edible oil namely Cardanol is directly blended with diesel for use in a single cylinder CI engine. Mthanol is added as an additive to improve the volatility, atomization etc. Experiments are carried out with various blends of cardanol namely B20 and B30 with 10% methanol and results are compared with B20. Results have shown that blend of 20% cardanol in diesel with 10% methanol gives higher brake thermal efficiency (BTE) at all loads compared to the 20% cardanol in diesel and minimum NOx emissions are observed. Smoke opacity and CO emissions are lower for the blend of 20% cardanol in diesel with 10% methanol than B20 at all load conditions. The results reveal that blend of 20% Cardanol - in diesel with 10% volume provide better engine performance (BTE) and improved emission characteristics.
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    Experimental analysis of cardanol biofuel as an alternative fuel for diesel engines with air-side oxygen enrichment
    (Trans Tech Publications Ltd ttp@transtec.ch, 2014) Dinesha, P.; Nayak, V.; Kumar, D.; Mohanan, P.
    The present study investigates the effect of air-side oxygen concentration enrichment on the performance and emission of a single cylinder diesel engine using a bio-fuel blend as fuel. In this study, a natural phenolic compound, namely, cardanol is selected as the bio-fuel, which is obtained from the shell of cashew nut after purification. A blend of B10M10 (10% cardanol +10% methanol + 80% diesel by volume) is prepared and tested in the engine at various loading conditions. The experiments are carried out at atmospheric oxygen condition and an increment of 3, 5, and 7% of atmospheric oxygen concentration by weight. There is a drastic reduction in HC, CO, and smoke except for NOx emission. The level of NOx emission increases as the oxygen concentration in the intake air is increased. The performance characteristic will increase as the oxygen concentration increases, and higher brake thermal efficiency is obtained for B10M10 at 7% oxygen concentration. B10M10 with 7% oxygen enrichment gives better results, similar to diesel, except for NOx emission. © (2014) Trans Tech Publications, Switzerland.
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    Performance and emission characteristics of LPG-Gasoline dual fuel on a multi-cylinder MPFI gasoline engine
    (Combustion Institute, 2015) Nayak, V.; Shankar, K.S.; Dinesha, P.; Mohanan, P.
    The present research experimentally investigates the performance and emission characteristics of LPG-Gasoline dual fuel on a gasoline engine. The engine setup consists of four stroke, four cylinder, water cooled MPFI engine with eddy current type loading unit. Experiments have been conducted with different LPG-Gasoline ratio (0%, 25%, 50%, 75%, and 100%) by mass and different speeds from 2000 to 4500 rpm in steps of 500 rpm at full load condition. From experimental investigation it is found that with the 50% usage of LPG, increases the brake thermal efficiency and volumetric efficiency when compared to gasoline for speed range of 2000 rpm to 4000 rpm. LPG will have much lower CO and HC emissions when compared to gasoline. This is a positive effect on environment. But for other LPG-gasoline ratio these emissions going to increases when compared to LPG but it is well below when compared to gasoline for all speeds. NOx emission is more for LPG almost 4 times that of gasoline for all speed conditions. For other LPG-gasoline ratio NOx emission is lower.
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    Impact of injection timing on the performance and emission characteristics of a diesel engine fueled with cardanol blends
    (Combustion Institute, 2015) Dinesha, P.; Nayak, V.; Mohanan, P.
    The present study investigates the effects of fuel injection timing (IT) on the performance and emission characteristics of a four stroke, single cylinder direct injection water cooled diesel engine when fueled with the blend of cardanol bio-fuel blends namely B10M10, B20M10 and B30M10. Tests have been conducted with an engine speed of 1500 rpm, fixed compression ratio 17.5:1, at full load condition and 220 bar injection pressure (IP). The performance and emission characteristics are studied at three different ITs. The fuel IT is varied by retarding 2 deg. and advancing 2 deg. with respect to 27.5 deg. bTDC and the tests are performed at 25.5, 27.5, and 29.5 deg. bTDC ITs. At the advanced IT, BSEC decreased as early start of fuel injection ensures more complete combustion owing to improved reaction between fuel and oxygen. Considerable reduction in CO, HC, and smoke emissions are achieved, while NOx emission showed an increasing trend with 29.5 deg. IT and 220 bar IP. The results of the present investigation of cardanol bio-fuel blends show slight variation in performance, combustion, and emission characteristics between B10M10 and B20M10 compared to B30M10 blend at 29.5 deg. bTDC advanced IT and 220 bar IP.