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标题：Improved Cold Flow Properties and Combustion Analysis of High Viscous Castor Oil and its Biodiesel in a CI Engine
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作者：T. Prakash ; V. Edwin Geo ; Leenus Jesu Martin 等
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2018
卷号：17
期号：4
页码：1183-1192
语种：English
出版社：Technoscience Publications
摘要：Vegetable oils are desirable as alternate fuels with ignition quality equivalent to diesel and its combustion characteristics, but unsuitable for direct operation in compression ignition (CI) engines as fuel because of their high viscosity in nature. Hence, fuel and engine based modifications are being tried to improve the performance of the CI engines. The high viscous oil does not evaporate quickly even after it is injected into the hot combustion chamber. Therefore, converting the high viscous vegetable oil into biodiesel improves the evaporation and hence combustion. There are two major problems related to the use of biodiesel as fuel are its oxidation stability and cold flow performance. In this investigation, castor oil, having a very high viscosity of 226.2 cSt at ambient temperature, is used as a fuel. The test results show a significant increase in the brake thermal efficiency from 23.5% (neat castor oil) to 29.7% with castor oil biodiesel (COME) operation. CO and HC emissions of the engine are less with castor oil biodiesel. The smoke emission reduces marginally with castor oil biodiesel to 69% at full load, but it is still higher than diesel fuel 57%.
关键词：Neat castor oil;Biodiesel;CI engines;Combustion;Emission and performance