Evaluación del comportamiento de óxidos de nitrógeno y material particulado de un motor de ciclo diésel con el uso de nanopartículas de titania en el sistema de refrigeración

Abstract

This study evaluates the use of TiO2 used in the cooling system of a diesel engine as an alternative for reducing NOx and PM emissions into the environment. The preparation of the nanofluid was performed using the two-step method, where the titanium nanoparticles were dispersed in the Valvoline G12+++ brand refrigerant, which meets the ASTM D-3306 and ASTM D-4985 standards, using an ultrasound probe. The volume concentration of nanoparticles was defined as 0,5 % v/v due to the improved fluid stability and reduction in sedimentation time. To evaluate the effect of the nano-coolant on exhaust gas reduction, an inline 4-cylinder diesel engine vehicle was used, using the IM-240 cycle. Tests showed a 1% reduction in NOx and 60% in PM, a 17% decrease in exhaust gas temperatures at the engine inlet of the coolant of 29% and 23% at the engine outlet of the coolant, showing that the higher the heat transfer capacity of the cooling system, the more the nanofluid enters the engine with a slight reduction in temperature, maintaining this tendency at the engine outlet.