Tesis profesional presentada por Ramón Alberto García Mena [ramon.garciama@udlap.mx]

Miembro del Programa de Honores. Licenciatura en Ingeniería Mecánica. Departamento de Ingeniería Industrial y Mecánica. Escuela de Ingeniería, Universidad de las Américas Puebla.

Jurado Calificador

Director: Dr. Rafael Carrera Espinoza
Presidente: Dr. Christian Lagarza Cortés
Secretario: Dr. Melvyn Álvarez Vera
Co-director: Dr. Pablo Moreno Garibaldi

Cholula, Puebla, México a 10 de mayo de 2024.

Resumen

In recent years, the use of biofuels has gained special attention from engineers, and car manufacturers as a way to reduce pollution and damage to the environment without discarding the internal combustion engine completely. In this thesis work, we compared the performance and exhaust emissions of a spark-ignition engine using gasoline and ethanol blends through Computational Fluid Dynamics simulation in Ansys Forte.

For this, the piston of the chosen engine was scanned and modeled in a simplified way for the simulation, as well as the head and liner geometries. Then, a volume was extracted from these geometries and a mesh was made. Then, after applying all the settings two simulations were performed, one with gasoline and another one with E10 from 1000 to 6000 RPM with increments of 500 RPM.

Through the simulations, it was determined that power output, torque, Indicated Mean Effective Pressure, and thermal efficiency were lower with E10 compared to gasoline. However, the specific fuel consumption was greater by 5.45% on average. Also, the better combustion offered by E10 contributed to the reduction in emissions of carbon monoxide (CO), carbon dioxide (CO2), and nitrogen oxides (NOx) by 5% to 6% on average. For unburnt hydrocarbons (UHC), the average reduction was 18.92% from 2000 to 6000 RPM.

From this research, it was concluded that despite the lower performance offered by E10 and higher fuel consumption, this fuel is adequate for reducing emissions in the future.

Keywords: gasoline, E10, engine, compression ratio, air/fuel ratio, piston, calorific value, thermal efficiency, power, fuel consumption, emissions

Table of content

Portada

Agradecimientos

Índices

Introduction

Justification

Objectives

  • 1 Main objective
  • 2 Specific objectives

Scope and limitations of the work

Hypothesis

General methodology

Capítulo 1. 

  • 1.1 Operation principle of the internal combustion engine
  • 1.2 Performance factors of the engine
  • 1.3 Exhaust emissions and catalytic conversion
  • 1.4 Fuel supply
  • 1.5 Gasoline direct injection
  • 1.6 Thermodynamics of the Internal Combustion Engine
  • 1.7 Properties of fuels and alternative fuels
  • 1.8 Ethanol as a fuel
  • 1.9 NOx emission formation
  • 1.10 Effects of ethanol addition to gasoline on emissions and performance

Capítulo 2. 

  • 2.1 Geometry
  • 2.2 Mesh controls
  • 2.3 Models
  • 2.4 Boundary conditions
  • 2.5 Initial conditions
  • 2.6 Simulation controls
  • 2.7 Output controls
  • 2.8 Running the simulation

Capítulo 3. 

  • 3.1 Performance results and discussion
  • 3.2 Emissions results and discussion
  • 3.3 Conclusion

Referencias

García Mena, R. A. 2024. Comparison of the performance and emissions of gasoline and E10 in an internal combustion engine using Computational Fluid Dynamics simulation. Tesis Licenciatura. Ingeniería Mecánica. Departamento de Ingeniería Industrial y Mecánica, Escuela de Ingeniería, Universidad de las Américas Puebla. Mayo. Derechos Reservados © 2024.