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Pune, India

Yadav S.D.,RIT | Thipse S.S.,ARAI
2013 International Conference on Energy Efficient Technologies for Sustainability, ICEETS 2013

The different alternative energy sources are available for various applications as the energy needs. But it is found that Bio-Gas can be accepted as energy sources, especially to villages of India, where the conventional energy facilities are scarcely available. Biogas is a valuable fuel of energy containing methane as a responsible major constituent. It is a clean and efficient fuel. This work presents development of scrubbing unit was simple for fabrication, production and operation by using local resources which are available at agriculture field side. an experimental investigation of scrubbing unit was improve the quality of biogas by scrubbing the carbon dioxide (CO 2), hydrogen sulphide (H2S) content The results obtained are encouraging and will make one of the options to use water scabbing method on field side to up grade the bio gas as non-conventional energy source for direct use as vehicle fuel as possible as cleanest engine fuel to environment, climate & human health. Out of several methods of biogas enrichment, water scrubbing is found to be a simple, low-cost and suitable method for enrichment of biogas in rural part of our country. © 2013 IEEE. Source

Chougule V.P.,Vellore Institute of Technology | Chhaganlal Vora K.,ARAI | Suryavanshi Y.,AVTEC Ltd | Gunjegaonkar D.,AVTEC Ltd
SAE Technical Papers

The objective of this project is to design of gas mixer venturi as per IS4477 and simulation of dual fuel (Diesel-CNG) engine for performances parameters to examine the BSFC using GT-suite. In present work; a 59 kW diesel engine of 18.5 compression ratio has been converted to operate on dual fuel (Diesel-CNG) keeping same compression ratio with improved fuel economy. Natural gas is an excellent fuel. Its combustion and emission characteristics are superior to any other realistic competing fuel. There are advanced technologies like closed loop lambda control system and lean combustion are incorporated in the engine to achieve the performance targets. In the initial stage; experimental testing is conducted for base diesel engine on engine dynamo for performance parameters. Experimental testing data and design data's of base diesel engine are used as input in GT-Suite to predict the performance of the base diesel engine. Mapping in GT-Suite is calibrated & optimized as per experimental results for getting closest result. Then, Experimental results and simulation results for base diesel engine are compared for performance parameters to validate the base diesel engine model of GT-Power. In second stage, simulation of Dual fuel (Diesel-CNG) engine is done using GT-Power. Dual fuel simulation results are compared with base diesel engine simulation results, experimental results and targeted values. © 2013 SAE International. Source

Mhaskar C.A.,Mahindra and Mahindra Ltd. | Marathe N.V.,ARAI | Arumugam S.K.,Vellore Institute of Technology
SAE Technical Papers

For meeting upcoming BS IV & BS V emission norms in Heavy Commercial Vehicles, most of the manufacturers are taking SCR after treatment route. Though SCR system is more complex and involves higher cost impact, an optimized SCR system can bring down the payback period to about one year due to improved fuel economy. For development of an SCR after treatment system, selection of a correct SCR catalyst and its position in the system is very important. NOX conversion efficiency of catalyst depends on exhaust gas temperature at the catalyst and the velocity distribution over the face of the catalyst. Generally catalysts are evaluated for the conversion efficiency in engine test bed. In a drive to have a first-time-right solution, a CFD analysis was carried out considering the low and high flow rate conditions. CFD simulation models and the corresponding results were used as a predictive tool in the exhaust system development process. These simulations helped to evaluate design proposals before finalizing the design. Prototype exhaust system components were developed for the best design proposal considering exhaust gas temperature profile, velocity distribution, pressure drop, and conversion efficiency of coated and extruded catalysts. This approach significantly reduced the prototype development and evaluation time. Copyright © 2016 SAE International. Source

The tire is generally characterized on the basis of forces and moments being generated at the contact patch, which describes the friction potential of the tire in both longitudinal and lateral directions at different load conditions. The field conditions and applications under which the tires (especially commercial one) perform is diverse, which results in varied performance for the same product. To understand this there is a need to recognize the range of friction values the tire undergoes in different conditions. Though there are couple of methods and indoor test available to estimate the available friction potential, they are not only deficient in replicating the different real road scenarios but also prove difficult to reproduce different road surfaces. There is also a lack of availability and expense of out door test equipment in India. A joint project has been undertaken between Apollo Tyres and ARAI, where both have used their technical expertise to work on tire characterization out of road test. A slip-based test approach has been carried out to estimate the available longitudinal tire-road friction potential using the longitudinal slip and forces generated at the tire contact patch during a braking test. The test vehicle was instrumented with wheel force sensors, to measure forces being developed in the tires, along with brake sensors and steering wheel sensors to monitor the amount of brake applied and avoid any lateral slippage. The braking test was carried out by varying speed and load conditions. The measured data was then analyzed to find out the longitudinal friction potential. It was observed that the longitudinal friction potential decreases with increase in both load and speed. This paper discuss the findings of this work carried out and also on development of generic methodology to measure and estimate the friction potential of tire using wheel force transducer in on-road testing. This methodology can be used for further on-the-field testing and evaluation of tires for research. Copyright © 2015 SAE International. Source

Dhingra B.,Vellore Institute of Technology | Sharma S.,Moscow Institute of Physics and Technology | Vora K.,ARAI | Ashok B.,Vellore Institute of Technology
SAE Technical Papers

This paper summarizes the research work incorporated in the exploration of the potential of swirling in CI Engine and designing of a new mechanism, particularly at inlet, to deliver it to improve the in-cylinder air characteristics to eventually improve mixing and combustion process to improve the engine performance. The research is concentrated on the measures to be done on engine geometry so as to not only deliver advantage to any specific fuel. According to the CI combustion theory, better engine performance may be achieved with Higher Viscous Fuel by improving the in-cylinder air-fuel mixing by increasing the swirl (rotation of air view from top of the cylinder) and tumble (rotation of air view from front of the cylinder) of in-cylinder air inside the fuel-injected region. The proposed inlet component is embedded with airfoil and is suitably designed after being iterated from four steps. The deciding factors of shape and orientation of these airfoils are height, chord length and number of blades. The preliminary assessment of the proposed component is performed on a CFD code using incompressible Navier-stokes with k-epsilon turbulence modeling. The 3D cold flow IC engine simulation is conducted on COSMOS and ANSYS Fluent. The validation of the results of in-cylinder airflow characteristics from simulations are compared with other related research works. This paper is the first in series of our research on Diesel Engine. The experimental validation of the proposed component is currently going-on and would be presented in the next publication. The results show that the better mixing of fuel is achieved and the concentration of CO and Unburned Hydrocarbons is also reduced. Copyright © 2015 SAE International and Copyright © SAEINDIA. Source

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