Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EFFECTS OF THE ADDITION OF HYDROGEN IN THE DIESEL ENGINE ADMISSION AIR CONSUMING FUEL B7 - NUMERICAL AND EXPERIMENTAL APPROACH
Submission Author:
Ricardo Pereira , PA
Co-Authors:
Ricardo Pereira , Hendrick Zarate Rocha, Manoel Fernandes Martins Nogueira, Lucas Freitas, Larissa Santos Queiroz
Presenter: Ricardo Pereira
doi://10.26678/ABCM.ENCIT2018.CIT18-0780
Abstract
This work analyzes the performance effects of a diesel generator set operating with a mixture of B7 (7% biodiesel in mineral diesel) and hydrogen gas (99.98% purity) injected into the engine intake air. Hydrogen was injected continuously at various mass concentrations (6, 8 and 10%). The results of the tests showed a reduction in the specific fuel consumption as a function of the increase in the hydrogen mass fraction, in the same way the CO2 and O emissions decreased proportionally as the hydrogen concentration was increased. On the other hand, the levels of nitrogen oxides (NOx) increased due to the increase of the average temperature inside the cylinder. In addition, the numerical results using the AVL-BOOST program showed that there was an increase in the peaks of the maximum pressure and the rate of heat release inside the cylinder as a function of the increase of hydrogen addition. It was also identified that there was reduction of the volumetric efficiency as the percentage of hydrogen concentration increased.
Keywords
Hydrogen, diesel b7, AVL Boost, Diesel generator set
