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The world is heading towards the demanding hike and the downfall of fossil fuels leading to move the energy dependency of transportation and thermal energy production to unearth another reliable resource. One of the best developing and upcoming resources for the near future is biodiesel. It serves as the everlasting economically friendly resource. This paper deals with the effects on performance of the biodiesel obtained from the Tamarind seed, one of the best resources in the southern parts of India. The compression ignition engine was utilized for carrying out the examinations for the tamarind seed biodiesel (TSB) blended with petroleum diesel. The biodiesel was blended in the ratios B20, B40, and B100. The brake thermal efficiency at 50% engine operating load condition with B20 fuel was found to be corresponding with diesel fuel with 24.87 %. In contrast, the greater the blend ratios resulted in the lesser values of the brake thermal efficiency. The brake-specific fuel consumption was 0.34 kg/kWh, which is closer to the value of diesel having 0.31 kg/kWh, and unfortunately, the value increases for the progressive blends. From the obtained emission results for the tamarind seed biodiesel, the toxic gases like nitrogen oxides and hydrocarbon emissions were noticeably reduced than the diesel fuel. The emitted carbon monoxide was lesser to that of diesel fuel at the 75% engine load operations. Considering the overall performance and emission characteristics, the B20 TSB performed well, and the results were closer to the diesel fuel. [ABSTRACT FROM AUTHOR]

Crude oil consumption is about 201.90 MMT in India for 2017-18. It is found that about 3/4th of crude oil is been utilized in transportation section, this has resulted in manufacturers globally to reduce the oil consumption without any sacrifice in performance of vehicles. Biodiesel, LPG, CNG and electric vehicles are some alternative methods used to reduce oil consumption. Many research work has been carried out globally by blending of Ethanol into Diesel or Hydrogen into Diesel are carried out by many researchers, but this has not been implemented commercially. Renewable and oxygenated fuel, ethanol is an attractive alternative fuel which aides in complete combustion of fuel in compression ignition engines (CI Engines). In this paper, engine performance has been studied with the addition Ethanol and Hydrogen. The investigation has been carried out on a single cylinder compression ignition engine (CI Engine) developing a maximum power of 3.7kw at 1500 rpm. Experimental analysis has been carried out for Crude Diesel (baseline fuel) and ratios of Diesel-Ethanol blends for various loading condition. Form the experimental investigations the following performance parameters has been recorded: brake thermal efficiency, brake specific fuel consumption, brake power and exhaust gas temperature. The results showed that the performance parameters were marginally inferior to the crude Diesel test results. From the investigation the reading clearly shows that for two fuel blending without much compromise Crude Diesel and Ethanol can be blended up to a ratio of 25% Ethanol 75% Diesel. Experimental investigations for Diesel-Hydrogen has been carried out with 6.9 liters per hour of constant hydrogen addition. This mixture had the most optimum performance characteristics. For three fuel combination i.e., Bio-Diesel (Ethanol & Diesel) and Hydrogen, Hydrogen was supplied at a constant rate of 6.9 liters per hour. From the investigations it has been found that E15-D85-H has the better performance characteristics. [ABSTRACT FROM AUTHOR]