Effects of Engine Cooling Water Temperature on Performance and Emission Characteristics of a Compression Ignition Engine Operated with Biofuel Blend

Abstract

The temperature of the coolant is known to have significant influence on engine performance and emissions. Whereas existing literature describes the effects of coolant temperature in engines using fossil derived fuels, very few studies have investigated these effects when biofuel is used. In this study, Jatropha oil was blended separately with ethanol and butanol. It was found that the 80% jatropha oil + 20% butanol blend was the most suitable alternative, as its properties were closest to that of fossil diesel. The coolant temperature was varied between 50 °C and 95 °C. The combustion process enhanced for both diesel and biofuel blend, when the coolant temperature was increased. The carbon dioxide emissions for both diesel and biofuel blend were observed to increase with temperature. The carbon monoxide, oxygen and lambda values were observed to decrease with temperature. When the engine was operated using diesel, nitrogen oxides emissions correlated in an opposite manner to smoke opacity; however, nitrogen oxides emissions and smoke opacity correlated in an identical manner for biofuel blend. Brake specific fuel consumption was observed to decrease as the temperature was increased and was higher on average when the biofuel was used. The study concludes that both biofuel blend and fossil diesel produced identical correlations between coolant temperature and engine performance. The trends of nitrogen oxides and smoke emissions with cooling temperatures were not identical to fossil diesel when biofuel blend was used in the engine.

The Cold Flow Properties of Palm Biodiesel for Diesel Blends Mandate in Malaysia’s Highlands

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Recent Advances in the Analysis of Sustainable Energy Systems

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Reasoning the Necessity of the Regulation of the Operation of the Cooling System of the Diesel of the Transport Vehicles

“…Система охолодження прямо визначає температуру охолоджуючої рідини, оливи, наддувочного повітря та ін. В джерелах [1,2,3] показано, що зміна температури охолоджуючої рідини в бік зростання призводить до покращення перетікання робочого процесу дизеля, зменшення витрати палива та скорочення шкідливого впливу на екологію.…”