A Comparative Analysis Of Combustion, Vibration, Performance, And Emission Of A Low-Speed Ididiesel Engine Fuelled With Pure Plant Oils

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A COMPARATIVE ANALYSIS OF COMBUSTION, VIBRATION, PERFORMANCE, AND EMISSION OF A LOW-SPEED IDIDIESEL ENGINE FUELLED WITH PURE PLANT OILS

Abstract
Compression Ignition Engine (CIE) is the main source power for electricity generation andagricultural in rural and remote, isolated areas of most developing countries. However, because
of the depletion of petroleum reserves, problems distribution of fuel to remote areas and theimpact of environment pollution caused by exhaust gas emissions, the necessity of searchingfor a diesel fuel substitution becomes a vital key for these areas. This leads to the idea of usinglocally grown pure plant oil that is available in each area to fuel directly CIE. Pure plant oil(PPO) is principally carbon neutral and therefore does not contribute to the global warming.
The main disadvantages that limit for using of pure plant oil in CIE are its high viscosity(approximately 10 times thicker), lower cetane and volatility. Three most common pure plantoils available in around Asia countries (Coconut oil, Palm oil and Jatropha Curcas L.) wereselected for this research. A preheater was designed to use waste heat from engine combustionchamber to reduce viscosity of pure plant oil. Combination of performance and emissions datawith analyzing process based on the in-cylinder pressure data and rate of heat release, theobtained results showed that pure plant oils had higher in performance and lower in exhaustemissions. Especially, a lightly improvement in reducing engine vibration was detected with
PPOs (around 2%). However, as the effect of high viscosity and low heating value, thecombustion process of pure plant oils in high load deteriorates (more than 70% engine load).

Keywords: Pure plant oil (PPO), Coconut, Palm, Jatropha curcas L., IDI-Diesel Engine,Combustion, Performance, Exhaust Gas Emission, Vibration

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