RSM-Based Parameter Optimization of Compression Ignition Engine Fueled with Diesel Blended with Two Biofuels: Rice Bran
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ORIGINAL CONTRIBUTION
RSM-Based Parameter Optimization of Compression Ignition Engine Fueled with Diesel Blended with Two Biofuels: Rice Bran and Karanja Navneet Kaushal1
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Pardeep Kumar1
Received: 20 July 2020 / Accepted: 30 October 2020 The Institution of Engineers (India) 2020
Abstract The threat of depletion of fossil fuels, extensively used in transport sector, is promoting the research in the field of alternative fuels. Biofuels possess properties close to that of diesel, but being viscous, used as blend with diesel in compression ignition (CI) engines. The current work explores the mixing of two biofuels, karanja oil and rice bran oil, in diesel (designated as RK20) and to observe the performance of CI engine. The blend was made by mixing the oils in the proportion of 10:10:80 (karanja oil, rice bran oil and neat diesel (ND), respectively). The test rig used to conduct the investigation was a double-cylinder, turbocharged and water-cooled direct injection CI engine having constant speed of 1800 rpm and fixed compression ratio of 18.5:1. The injection parameters were varied to optimize the performance parameters of CI engine for the prepared blend of biofuel. The optimized output parameters were brake specific fuel consumption (BSFC) and brake power (BP) of the CI engine. The ranges of injection timing (IT) and injection pressure (IP) were 15 –28 btdc and 230–300 bar, respectively. Central composite design technique of response surface methodology was used for design of experiments. The results include the lowest BSFC at low IP and IT for both ND and RK20 blend, also comparable with each other. Maximum BP and minimum BSFC were predicted at 15 btdc and 230 bar IT and IP respectively for both RK20 blend and ND. Keywords Biofuel Injection pressure Injection timing Brake-specific fuel consumption Brake power & Navneet Kaushal [email protected] 1
Yadavindra College of Engineering, Punjabi University, Talwandi Sabo, District Bathinda, Punjab, India
Abbreviations BSFC Brake-specific fuel consumption BTE Brake thermal efficiency BP Brake power IT Injection timing IP Injection pressure CR Compression ratio RSM Response surface methodology CCD Central composite design CI Compression ignition rpm Revolutions per minute btdc Before top dead center RK20 10% rice bran ? 10% karanja ? 80% neat diesel ND Neat diesel cc Cubic centimeter
Introduction The advancement in technology is easing the lives but at the same time the demand for energy is also increasing even at a greater pace. Fossil fuels cover a major proportion of the total energy demand, which is due to increase in the number of automobiles [1]. Life will become extremely difficult in case the fossil fuels are exhausted, fossil fuels are extensively used for running the automobiles. Moreover, the transportation sector depends mostly on diesel and petrol, which are derived from fossil fuels [2–4]. Department of energy of US predicted that about half of the fossil fuel reserves are expected to be exhausted near around 2020. Therefore, if
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