Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Thermodynamic Modelling Development and Calibration to Support Diesel Engines Indicating Measurements Analysis
Submission Author:
Renan Cristofori Lima de Oliveira , ES , Brazil
Co-Authors:
João L M Donatelli, José Joaquim Conceição Soares Santos, Carla César Martins Cunha, Andre Chun, Allan Valiati, Renan Cristofori Lima de Oliveira
Presenter: Renan Cristofori Lima de Oliveira
doi://10.26678/ABCM.COBEM2017.COB17-1293
Abstract
Indicating measurements are made to support the monitoring and maintenance of outstanding engines performance. However, an analysis of indicating measurements data are not a trivial task. Hence, computational simulations are a powerful tool to support engines diagnoses from an interpretation of these data. In this paper, a zero-dimensional thermodynamic modelling is carried out to represent diesel engines processes while intake and exhaust valves are closed, i.e., compression, combustion and expansion. In addition, a graphical adjustment was made from experimental data to represent intake and exhaust strokes. This modelling took into consideration convection and radiation heat transfer and a dual Wiebe’s function to model the heat release. The experimental data was collected from two cylinders of a Wärtsilä W20V32 engine, which is installed on Thermal Power Plant of Viana S.A (TEVISA), a thermal power plant located in Viana, ES, Brazil. Engines performance was evaluated from some combustion parameters and it was found that a difference of 1.8 crankangle degrees in combustion start leads to a reduction of 7.75 kW on indicated power. All processes were properly simulated through software EES (Engineering Equation Solver).
Keywords
Combustion Analysis, Zero-Dimensional Modelling, diesel engines, Indicating Measurements, EES
