Utilization of Coconut Shell Pyro Oil Blended with the Optimum Amount of Turpentine for Better Performance in Diesel Engine

Abstract

In this paper, the potential for employing coconut shell pyro oil-diesel mixtures as substitute fuels in CI engines is explored. Under various braking power situations, the effects of adding a fixed proportion (by vol.) of turpentine (TE) to various coconut shell pyro oil (CSPO)-diesel (D) blends were examined. The engine was a direct injection, single cylinder, water-cooled, naturally aspirated, constant speed run, CI engine. The fuels that were put to the test included plain diesel, CSPOTE5, (5CSPO + 5%TE + 90D) CSPOTE10 (CSPO10 + 5TE + 85D) and CSPOTE15 (15 CSPO + 5%TE + 80% D). Laboratory-scale rapid pyrolysis equipment was used to extract CSPO. ASTM criteria were followed in the preparation and analysis of fuel samples. Due to characteristics like excellent anti-pinging and low sensitivity, etc. Turpentine was anticipated to enhance the engine characteristics in a perfect CSPO-diesel combination. For each fuel mixture, a series of tests were carried out and data on in-cylinder pressure, fuel consumption, exhaust emission levels and temperature readings were kept. At the rated power output condition, CSPOTE5 fuel demonstrated an increase in brake thermal efficiency of 1.87%, a reduction in brake-specific fuel consumption of 7%, a decrease in exhaust gas temperatures of nearly 4% and a decrease in exhaust emissions such as HC (from 95 ppm to 82 ppm), CO (from 0.1% to 0.06%), NOX (from 450 ppm to 426 ppm) and smoke levels (from 70 Bsn to 65 Bsn). The engine parameters that were improved upon were determined to be subpar, which makes it unlikely that CSPOTE5 will be the greatest diesel substitute.