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2017-10-13
Technical Paper
2017-01-5012
Harveer Singh Pali, Shashi Prakash Dwivedi
Abstract The present work deals with the fabrication and tribological testing of an aluminium/SiC composite. Fabrication was done using two techniques; mechanical stir casting and electromagnetic stir casting. Metal matrix composite (MMC) was fabricated using aluminium as a matrix and SiC as reinforcement in varying weight percentages. The wear and frictional properties of the MMC were studied by performing dry sliding wear test using a pin-on-disc wear tester for both types of samples. Wear rate retards with the increase the percentage of reinforcement whereas it improves with the addition of normal force. At same time frictional coefficient upsurges by increasing the normal force and percentage of reinforcement. Increasing percentage of reinforcement and using electromagnetic stir casting process obtained the higher frictional coefficient and lower wear rate.
2017-10-08
Technical Paper
2017-01-2331
Amar Deep, Naveen Kumar, Harveer Singh Pali
Abstract The use of alternative fuel has many advantages and the main ones are its renewability, biodegradability with better quality exhaust gas emission, which do not contribute to raise the level of carbon dioxide in the atmosphere. The use of non-edible vegetables oils as an alternative fuels for diesel engine is accelerated by the energy crisis due to depletion of resources and increase in environmental problems. In Asian countries like India, great need of edible oil as a food so cannot use these oils as alternative fuels for diesel engine. However there are many issues related to the use of vegetable oils in diesel engine that is high viscosity, low calorific value, high self-ignition temperature etc. Jatropha curcas has been promoted in India as a sustainable substitute to diesel fuel. This research prepared micro emulsions of ethanol and Jatropha vegetable oil in different ratio and find out the physico-chemical parameters to compare with mineral diesel oil.
2016-04-05
Technical Paper
2016-01-0533
Harveer Singh Pali, Naveen Kumar, Kausambi Singh
Abstract In the present investigation AA6082/ SiC MMC composite is fabricated using electromagnetic stir casting technique. Silicon carbide (SiC) of 40 μm size is used as reinforcement and is varied by weight percentage as 0%, 2.5%, 5%, 7.5%, 10% in alloy AA6082. The microstructure of the fabricated composite is studied by scanning electron microscopy (SEM) which shows even distribution of the reinforcement. The mechanical properties improve with SiCp till 7.5%, after that the properties decreases which may be due to presence of porosity during the composite manufacturing. A comparative study of mechanical properties such as tensile strength, hardness and toughness has been done between the composite and base aluminium alloy. After the comparative study it was found that the composite having AA6082/SiC-92.5%/7.5% is best suited. So, it is used for optimization of Electrical Discharge Machining (EDM) process parameters using Taguchi’s design of experiment.
2016-04-05
Technical Paper
2016-01-1269
Naveen Kumar, Harveer Singh Pali
Abstract The present study was carried to explore the potential suitability of biodiesel as an extender of Kerosene in an off road dual fuel (gasoline start, kerosene run) generator set and results were compared with kerosene base line data. The biodiesel was blended with kerosene in two different proportions; 2.5% and 5% by volume. Physico-chemical properties of blends were also found to be comparable with kerosene. Engine tests were performed on three test fuels namely K100 (Kerosene 100%), KB 2.5 (Kerosene 97.5% + Biodiesel 2.5%) and KB5 (Kerosene 95% + Biodiesel 5%). It was found that brake thermal efficiency [BTE] increases up to 3.9% while brake specific energy consumption [BSEC] decreases up to 2.2% with increasing 5% volume fraction of biodiesel in kerosene. The exhaust temperature for blends was lower than kerosene. The test engine emitted reduced Carbon monoxide [CO] emission was 7.4 % less than using neat kerosene as compared to kerosene-biodiesel blends.
2015-04-14
Technical Paper
2015-01-0958
Naveen Kumar, Sidharth Bansal, Harveer Singh Pali
Abstract Concerns about long term availability of petroleum based fuels and stringent environmental norms have been a subject for deliberations around the globe. The vegetable oil based fuels and alcohols are very promising alternative fuels for substitution of diesel, reduce exhaust emissions and to improve combustion in diesel engines which is mainly possible due to oxygenated nature of these fuels. Jatropha oil is important non-edible oil in India which is either used in neat or modified form as diesel fuel. Furthermore n-butanol is renewable higher alcohol having properties quite similar to diesel fuel. In the present study, n-butanol was blended in Jatropha Oil (JO) and Jatropha Oil Methyl Ester (JME) on volumetric basis (10 and 20%). The blends were homogeneous and stable and there was no phase separation. The different physicochemical properties of blends were evaluated as per relevant standards.
2015-04-14
Technical Paper
2015-01-1297
Harveer Singh Pali, Naveen Kumar, Yahaya Alhassan, Amar Deep
Abstract Biodiesel production has been getting global awareness since Petroleum prices are escalating continuously. As biodiesel is gaining considerable demand, standards are vital for its commercialization and market introduction. Feedstocks availability has posed serious challenges, thus the need for non-edible and unexplored feedstocks has risen. In Indian context, Biodiesel is produced using sal seed oil which is potentially available in Indian forest as a non-edible feedstock. The present paper deals with the production optimization using design of experiments and fuel property characterization of Sal biodiesel (sal methyl esters). Transesterification process parameters like catalyst concentration (% w/w), Oil to Methanol molar ratio, reaction time (min) and reaction temperature (°C) were considered the significance factors and the response was taken as the Yield (% w/w). Experiment matrix with several combinations of factors was generated.
2014-04-01
Technical Paper
2014-01-1396
Harveer Singh Pali, Naveen Kumar, Chinmaya Mishra
Abstract In the present study, ethanol was added in lower proportions to non-edible vegetable oil “Schleichera oleosa” or “Kusum”, to evaluate various performance and emission characteristics of a single cylinder; diesel engine. For engine's trial, four samples were prepared with 5%, 10%, 15% and 20% ethanol in kusum oil (v/v) and the blends were named as E5K95, E10K90, E15K85 and E20K80 respectively. Neat Kusum oil was named as K100. The results indicated that brake thermal efficiency (BTE) was found to increase with increase in volume fraction of ethanol in the kusum oil. E5K95, E10K90, E15K85 and E20K80 test fuels exhibited maximum BTE of 25.4%, 26.4%, 27.4% and 27.7% respectively as compared to 23.6% exhibited by the neat Kusum oil. Similarly, full load brake specific energy consumption (BSEC) decreased from 16.3MJ/kWh in case of neat Kusum oil to 15.1MJ/kWh for E20K80 with an almost linear reduction pattern with increased ethanol composition in the test fuel.
2014-04-01
Technical Paper
2014-01-1952
Harveer Singh Pali, Naveen Kumar, Chinmaya Mishra
Abstract Biodiesel from non-edible vegetable oils is of paramount significance in India due to insufficient edible oil production. The present work deals with relatively underutilized non-edible oil “Schleichera oleosa” or “Kusum”. The Kusum biodiesel (KB) was produced using a two stage esterification cum transesterification process as the free fatty acid content of the oil was high. Important physico-chemical properties were evaluated and they were found to conform with corresponding ASTM/EN standards. Various test fuels were prepared for the engine trial by blending 10%, 20%, 30% and 40% of KB in diesel by volume and were named as KB10, KB20, KB30 and KB40 respectively. The results showed that full load brake thermal efficiency was dropped by 3.8% to 17% with increase in KB composition in the test fuel. Diesel (D100) showed the maximum full load brake specific energy consumption followed by KB10, KB20, KB30 and KB40.
2013-09-08
Journal Article
2013-24-0105
Vipul Vibhanshu, Naveen Kumar, Chinmaya Mishra, Sunil Sinha, Harveer Singh Pali, Sidharth Bansal
Dwindling petroleum reserves and alarming level of air pollution has been an issue of great concern in recent times and researchers across the world are experimenting on variety of renewable fuels for meeting the future energy demands. Within the gamut of alternative fuels, biofuels are the most promising and have the potential to mitigate climate change and lease a new life to existing IC engines. The vegetable oils are having immense potential in this context and have been used either in neat or modified form by large number of researchers. Jatropha curcus is a perennial plant and bears non edible oil. The plant is drought tolerant and has been cultivated all over the arid and semi-arid areas for reforestation. In the present study, blends of jatropha oil and ethanol have been prepared in 5, 10, 15 and 20% (v/v) and evaluation of important properties of blends has been carried. The results show that properties are quite similar to diesel fuel.
Viewing 1 to 9 of 9