Experimental Investigations on Performance And Emission Characteristics of LHR Engine At Different Injection Timings Using Biodiesel Fuels
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 1
Abstract
The reduction of heat loss from the combustion chamber of diesel engines improves fuel efficiency only by 3 or 4 per cent. Some other gains may be possible from a smaller cooling system, recovery of exhaust energy, and improvements in aerodynamics. The use of thermal barrier coatings (TBCs) to increase the combustion temperature in diesel engines has been pursued for over 20 years. Increased combustion temperature can increase the efficiency of the engine, decrease the CO and (possibly) the NOx emission rate. However, TBCs have not yet met with wide success in diesel engine applications because of various problems associated with the thermo mechanical properties of the coating materials. Although, the in-cylinder temperatures that can be achieved by the application of ceramic coatings can be as high as 850-9000C compared to current temperatures of 650-7000C. The increase in the in-cylinder temperatures helped in better release of energy in the case of biodiesel fuels thereby reducing emissions at, almost the same performance as the diesel fuel.The aim of this study is to apply Thermal Barrier Coatings (TBC) onto engine parts for improving engine performance when biodiesel is used as an alternative fuel. For this purpose, a Direct Injection (DI) diesel engine was converted to a LHR engine by applying MgZrO2(TBC) on the Piston Crown and the effects of biodiesel (produced from Pongamia oil) usage in the LHR engine, performance and emission characteristics have been investigated experimentally with injection timings of 21°,23°and 25° BTDC. The results showed that specific fuel consumption and the brake thermal efficiency were improved, and the smoke density of the engine is decreased compared to the base engine when it is run with diesel.
Authors and Affiliations
Srikanth. Vadlamudi, B. Raja Narender, Shaik. Ismail
Keywords
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