INVESTIGATIONS ON EXHAUST EMISSIONS OF INSULATED DIESEL ENGINE FUELLED WITH ALGAE OIL BLENDED WITH NANO PARTICLESP. Srinivas Reddy, M.V.S. Murali Krishna and Narsimhulu Sanke
Vegetable oils are good substitutes for diesel, as they are renewable, comparable calorific value and cetane (measure of combustion quality) number when compared with neat diesel operation. However, the disadvantages associated with vegetable oils such as high viscosity and low volatility cause combustion problems in diesel engines, which call for low heat rejection (LHR) engine, consisting of air gap insulated piston and air gap insulated liner. Particulate matter (PM), oxides of nitrogen (NOx), carbon mono oxide (CO) levels and un-burnt hydro carbons (UBHC) are the exhaust emissions from a diesel engine. They cause health hazards, once they are inhaled in. They also cause environmental effects like Green-house effect and Global Warming. Hence control of these emissions is an immediate effect and an urgent step. The pollutants of PM, NOx, CO and UBHC were determined at full load operation of the engine fuelled with algae oil blended with optimum quantity of diethyl ether (DEE) mixed with copper nano particles with varied injection timing with both versions of the engine such as conventional engine (CE) and LHR engine and compared with diesel operation on conventional engine. Particulate emissions were determined by AVL Smoke meter, while other emissions were measured by Netel Chromatograph multi-gas analyzer at full load operation. The pollutants of PM, CO and UBHC were drastically reduced with test fuel with advanced injection timing with both versions of the engine. However, NOx emissions increased with LHR engine.