Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EXERGOECONOMIC ANALYSIS OF A DIESEL ENGINE
Submission Author:
Eduardo José Cidade Cavalcanti , RN
Co-Authors:
Eduardo José Cidade Cavalcanti, Arthur Barbosa, Matheus Lima
Presenter: Arthur Barbosa
doi://10.26678/ABCM.ENCIT2018.CIT18-0118
Abstract
Diesel engine is an important system to electricity production, however, with disadvantage of being a high source of pollutant emissions. This study, an engine operating with diesel oil containing 7% biodiesel, constant engine speed of 1800 rpm for different loads was studied. A combustion model based on the data of unburned hydrocarbon, CO and NOx was developed. The exergy and exergoeconomy analyses were carried out in order to calculate the parameters as thermal and exergetic efficiency, exergy destruction rate, cost rate of the exergy destruction, total cost rate, electricity cost rate per exergy unit, exergoeconomic factor and relative cost difference. The error of combustion model can be low when the chemical formula of fuel is known. The results reveal that the thermal and exergetic efficiency, total exergy loss and exergy destruction rate, fuel cost rate and total cost rate increase with load. On the other hand, the specific cost of electrity, exergoeconomic factor and relative cost difference decrease wit load. The best performance of diesel engine is at high power load conditions according to exergetic and exergoeconomic point of view.
Keywords
Diesel engine, pollutant emissions, exergoeconomy, Thermal performance, Combustion
