An Experimental Investigation Of Performance And Gasseous Exhaust Emission Of A Diesel Engine Using Blends Of A Vegetable Oil

Ab Rahim, Muhammad Syakir (2017) An Experimental Investigation Of Performance And Gasseous Exhaust Emission Of A Diesel Engine Using Blends Of A Vegetable Oil. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Alternative fuels have received much attention due to the depletion of world petroleum reserves and increased environmental concerns. Vegetable oils can provide cleaner burning and renewable alternatives to diesel fuel. Thus, vegetable oil offers as an attractive alternative fuel to compression ignition engines. However, their inherently high viscosity as compared to petroleum based diesel is undesirable for diesel engines. This research concentrates on the study of the prospect of using vegetable oils as a replacement for diesel fuel by configuring an experiment to test the engine’s performance and to determine the level of emission on three fuel blends of coconut oil such as 10%, 20% and 30% of coconut oil – diesel blends. The presented work investigates the engine performance parameters and emissions characteristics for direct injection diesel engine using coconut diesel blends without any engine modifications. Experiment has been conducted at a fixed engine speed of 2500 rpm, and then it was gradually loaded. The experiments were conducted at five loads, namely 0 bar (no load), 10 bar, 20 bar, 30 bar and 40 bar. For each load condition the engine was run for at least 4-5 minutes. Results show that the basic engine performance such as power output and fuel consumption is comparable to diesel. When fueled with diesel blends, reduction of power output and incline fuel consumption was noted and with the increased amount of coconut oil in the blends. In case of engine exhaust gas emissions, lower CO2 and NOx, while higher CO and HC emissions have been found for blended fuels compared to diesel fuel.

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