• Impact of Injection Pressure on Performance Parameters of High Grade Semi Adiabatic Diesel Engine with Cotton Seed Biodiesel
• Author  :  D. Srikanth, M.V.S. Murali Krishna and P. Usha Sri
• Pages   :  13-19
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• Abstract

As a renewable, sustainable and alternative fuel for compression ignition engines, biodiesel instead of diesel has been increasingly fueled to study its effects on engine performances and emissions in the recent 10 years. But these studies have been rarely reviewed to favor understanding and popularization for biodiesel so far in conventional diesel engines. Biodiesels derived from vegetable oils present a very promising alternative for diesel fuel, since they have numerous advantages compared to fossil fuels. They are renewable, biodegradable, provide energy security and foreign exchange savings besides addressing environmental concerns and socio–economic issues. However drawbacks associated with biodiesel of high viscosity and low volatility which cause combustion problems in CI engines, call for engine with hot combustion chamber. They have significant characteristics of higher operating temperature, maximum heat release, and ability to handle low calorific value fuel. Investigations were carried out to evaluate the performance with low heat rejection combustion chamber with cotton seed biodiesel with varied injection pressure. It consisted of an air gap insulated piston, an air gap insulated liner and ceramic coated cylinder head cotton seed biodiesel with varied injector opening pressure. Comparative studies were made for engine with LHR combustion chamber and CE at manufacturer’s recommended injection timing (27o bTDC) with biodiesel operation. Engine with LHR combustion chamber with biodiesel showed improved performance at 27o bTDC over CE.

Keywords: Vegetable oil, Biodiesel; LHR combustion chamber; Fuel performance

Article published in International Journal of Thermal Technologies, Vol.6,No.1 (March-2016)