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2017 - 201912020 - 20221
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Subject: Mechanical Engineering × Author: Gautam, Puneet Singh × End date: 2024 ×
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    ThesisItemOpen Access
    Study on combustion, performance and emission characteristics of water emulsified fuels in C.I. engine
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-04) Gautam, Puneet Singh; Gupta, V. K.
    In this investigation, tests were carried out to standardize the constituent levels in order to achieve stable emulsions of aqueous and anhydrous alcohols with diesel fuel using Propylene Glycol Monostearate (PGM), Tween 80 as an emulsifier, and octanol as a coemulsifier. The phase separation and homogeneity of several emulsions were observed at room temperature (28°-34°C) and different temperatures ranges (0°-45°C). The engine's combustion, performance, emission characteristics, and combustion stability were evaluated on selected emulsion fuels on a computerized 1-cylinder, four-stroke, watercooled, direct injection diesel engine of constant engine speed. The engine performance was evaluated in terms of performance parameters such as brake power, brake specific fuel consumption, thermal efficiency, and combustion parameters such as cylinder pressure, HRR, ID, CD, MFB, etc. The emission parameters, CO, CO2, HC, NOx, and exhaust gas temperature, were evaluated. The engine's fuel consumption was found to be higher at all brake loads in case of emulsions selected for experimental investigations compared to diesel. Further, a single zone thermodynamic model was developed to predict the combustion characteristics such as in-cylinder pressure, heat release rate (HRR), using fundamental thermodynamic equations and various models. The success of the thermodynamic model was evaluated by statistical metrics (R², standard error (S), Pearson’s correlation (r), and P-value). The model accurately predicted the numerical results of cylinder pressure and HRR for diesel fuel and E50 emulsion at full loading condition. The statistical analysis of the predicted data by regression method and P-value showed strong evidence of significant data by this model. The mean values of the numerical data lay within 95% confidence interval in regression analysis for diesel at full loading condition.
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    ThesisItemOpen Access
    Theoretical and experimental analysis of CI engine fuelled with Calophyllum inophyllum biodiesel and diesel with ethanol as an additive
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-08) Gautam, Puneet Singh; Gupta, V.K.
    Energy is a basic contribution for social and economic development. The energy strategy of a nation goes for productivity and security and to give access which being environment friendly and accomplishment of primary resources for energy generation. Petroleum fuels will keep on playing a predominant part in the area of energy in our country in couple of few decades. However, traditional or petroleum fuel resources are limited, non-renewable, polluting and, accordingly, should be utilized judiciously whereas renewable energy sources are indigenous, non-polluting and its availability is unlimited. In this way, their utilization ought to be supported in every possible way. The aim of this present work is to extract biodiesel from a new non edible oil known as calophyllum inophyllum (tamanu oil). The retained finished biodiesel is further blended with the reference baseline fuel i.e. diesel and ethanol in proposed percentage and to test the performance parameters such as brake power, brake specific fuel consumption, brake thermal efficiency, and emission characteristics (exhaust temperature, smoke density) experimentally on 4.4kW rated power, single cylinder four stroke compressed ignition engine. Then few of the experimental results are validated using two zone, zero dimensional model after discretizing empirical correlations with forward difference method and solving the same in matrix laboratory (MATLAB) and some other important theoretical results such as bulk in-cylinder pressure, in-cylinder temperature, heat release rate, power, torque, work done etc. at different loads are analysed.