Abstract: Biodiesel exhibits many good properties such as non-toxic fuel, renewable fuel, emits less amount of CO2 and NOx and highly biodegradable. Burning of petroleum based fuel results in the accumulation of carbon dioxide; carbon monoxide in the environment  and also day by day the cost of petroleum based fuels are increasing. It has been proved in many studies that the algae grown in CO2-enriched air can be effectively utilized for converting it to oily substance(algae oil) and by doing trans-esterification process biodiesel can be produced. In this study algae’ belonging to the Oedogonium species  is used for biodiesel production and the byproduct obtained through this process is glycerin. Cooling is very much essential for IC engines because high temperatures damage engine materials and lubricants. Engine cooling removes heat energy fast enough to keep temperatures low so that the engine can survive. A cooling curve test was performed in order to find the effect of using glycerin as engine coolant by mixing 50% of glycerin with 50% of water . The experiment was conducted on kirloskar made 4 stroke single cylinder vertical hand cranking type diesel engine. The main focus of this experiment was to determine the rate of heat carried away by coolant and specific fuel consumption. Temperature of coolant at outside was varied, while the speed of engine was kept constant. To achieve a particular temperature for ethylene glycol based coolant, the flow rate was made to reach a required value and it was compared with the flow rate of water.
Keywords: Algae oil, Biodiesel, Renewable resource, Trans-esterification, coolant, Glycerol based coolants, heat carried, Specific fuel consumption, cooling curve test.