THE USAGE OF STOICHIOMETRIC MIXTURE OF HYDROGEN- OXYGEN (HHO) IN DIRECT INJECTION DIESEL ENGINE USING PREHEATED 50% PURE COCONUT OIL (PCO)-DIESEL FUEL

• Main Author: BAHAR (NIM : 13105114); Tim pembimbing : Dr. Ir. Iman K. Reksowardojo; Athol J. Kilgour,B., ADRIAN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/14668
• Institution: Institut Teknologi Bandung

The world community is currently undergoing two major problems, namely the decreasing reserves of fossil fuels and CO2 emissions from the use of diesel fuel that contribute to global warming. Pure Coconut Oil (PCO) is a <br /> <br /> <br /> alternative fuel for diesel engine. PCO has several advantages such as renewable, net zero CO2 emission, oxigen content, and lower sulfur content. As a alternative fuel, pure coconut oil (PCO) has several disadvantages compared to diesel fuel such as lower heating value, higher viscosity and lower volatility. Therefore, to offset this disadvantages of viscosity, this research investigated the effect of blending PCO with diesel fuel in the ratio of 1:1 by volume, heating the fuel using heater up to 70oC, and providing hydrogen supplementation at a low rate through <br /> <br /> <br /> intake manifold to enhance combustion properties. The experiment result at constant speed 2000 rpm and different load shows that addition HHO in PCO increased thermal efficiency by 4,24%, BSFC value fell by 9,24%, emission of THC can be down by 1,21%, CO can be reduced by 0,74%, and Smoke Opacity can be dropped by 9,20%. In compared to diesel fuel, value of efficiency thermal incrased 4,35%, emission smoke opacity decreased by 15,99% and gas exhaust temperature fell by 4,28 when using PCO+HHO at speed 2000 rpm. From pressure curves and rate of heat release graphs, it can be seen additon of HHO in PCO reduced an ignition delay and peak pressure. The closer the peak pressure to Top Dead Centre (TDC) will give higher torque and power.