期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：10
页码：5809
出版社：S&S Publications
摘要：It has been found that the vegetable oils are promising substitute, because of their properties are similar tothose of diesel fuel and they are renewable and can be easily produced. However, drawbacks associated with crudevegetable oils are high viscosity, low volatility call for low heat rejection diesel engine. Comparative studies were madeon performance evaluation of medium grade LHR diesel engine (with air gap insulated piston with superni ( an alloy ofnickel) crown and air gap insulated liner with superni insert) and conventional diesel engine (CE) with differentoperating conditions [normal temperature and pre-heated temperature] of crude cotton seed oil with varied injectoropening pressure and injection timing. Performance parameters [brake thermal efficiency, brake exhaust gastemperature, volumetric efficiency, sound levels and coolant load], exhaust emissions [smoke levels and oxides ofnitrogen] were determined at various values of brake mean effective pressure of the engine. Combustion characteristics(peak pressure, maximum rate of pressure rise and time of occurrence of peak pressure) were evaluated at peak loadoperation of the engine. Conventional engine showed deteriorated performance, while LHR engine showed improvedperformance with cotton seed oil at recommended injection timing and pressure in comparison with pure dieseloperation on CE. The optimum injection timing was 32obTDC with conventional engine, while it was 30obTDC forLHR engine with cotton seed oil operation.
