ENGD3110
Power and Energy Systems
Energy balance of a diesel engine
Johnson Akanbi
P2591881
BEng Mechanical Engineering
2022-2023
,Contents
Energy balance of a diesel engine ..................................................................................................... 4
Introduction .................................................................................................................................. 4
Objective ....................................................................................................................................... 4
Background ................................................................................................................................... 4
Research........................................................................................................................................ 5
Benefits of diesel engine over petrol .......................................................................................... 5
Disadvantages of diesel engine compared to petrol engine. ....................................................... 5
Emissions from diesel engines and effect on environment and human health ............................ 6
Apparatus ...................................................................................................................................... 6
Procedure...................................................................................................................................... 7
Results........................................................................................................................................... 8
Sample Calculations ....................................................................................................................... 9
Brake Mean Effective Pressure (BMEP) ...................................................................................... 9
Air Mass Flow rate ................................................................................................................... 10
Fuel Flow rate .......................................................................................................................... 11
Air-fuel Ratio ........................................................................................................................... 11
Brake specific Fuel Consumption (BSFC) ................................................................................... 11
Rate of Energy Input ................................................................................................................ 11
Rate of Energy to cooling water ............................................................................................... 12
Rate of Energy in Exhaust......................................................................................................... 12
Brake Thermal Efficiency.......................................................................................................... 12
Friction losses .......................................................................................................................... 12
Rate of energy balance as % to Qin for pie charts balance for Test A at 2000rpm ..................... 12
Calculated results from experiment ............................................................................................. 13
Graphs of calculated values ......................................................................................................... 14
Pie charts of energy ouputs ......................................................................................................... 15
For 2000 RPM .......................................................................................................................... 15
For 2500 RPM .......................................................................................................................... 17
Discussion ................................................................................................................................... 18
Thermal Performance .............................................................................................................. 18
Emissions..................................................................................................................................... 19
CO- Carbon monoxide.............................................................................................................. 19
CO2- Carbon dioxide................................................................................................................. 20
NOX (ppm)- Nitrous Oxide ....................................................................................................... 20
2|P ag e
Johnson Akanbi P2591881
, NO- Nitric Oxide....................................................................................................................... 21
O2- Oxygen .............................................................................................................................. 21
Energy balance and explanation of extra energy losses ................................................................ 22
Conclusion ................................................................................................................................... 22
Appendix ..................................................................................................................................... 23
Table of figures ........................................................................................................................ 23
Tables ...................................................................................................................................... 23
References .................................................................................................................................. 24
3|P ag e
Johnson Akanbi P2591881
Power and Energy Systems
Energy balance of a diesel engine
Johnson Akanbi
P2591881
BEng Mechanical Engineering
2022-2023
,Contents
Energy balance of a diesel engine ..................................................................................................... 4
Introduction .................................................................................................................................. 4
Objective ....................................................................................................................................... 4
Background ................................................................................................................................... 4
Research........................................................................................................................................ 5
Benefits of diesel engine over petrol .......................................................................................... 5
Disadvantages of diesel engine compared to petrol engine. ....................................................... 5
Emissions from diesel engines and effect on environment and human health ............................ 6
Apparatus ...................................................................................................................................... 6
Procedure...................................................................................................................................... 7
Results........................................................................................................................................... 8
Sample Calculations ....................................................................................................................... 9
Brake Mean Effective Pressure (BMEP) ...................................................................................... 9
Air Mass Flow rate ................................................................................................................... 10
Fuel Flow rate .......................................................................................................................... 11
Air-fuel Ratio ........................................................................................................................... 11
Brake specific Fuel Consumption (BSFC) ................................................................................... 11
Rate of Energy Input ................................................................................................................ 11
Rate of Energy to cooling water ............................................................................................... 12
Rate of Energy in Exhaust......................................................................................................... 12
Brake Thermal Efficiency.......................................................................................................... 12
Friction losses .......................................................................................................................... 12
Rate of energy balance as % to Qin for pie charts balance for Test A at 2000rpm ..................... 12
Calculated results from experiment ............................................................................................. 13
Graphs of calculated values ......................................................................................................... 14
Pie charts of energy ouputs ......................................................................................................... 15
For 2000 RPM .......................................................................................................................... 15
For 2500 RPM .......................................................................................................................... 17
Discussion ................................................................................................................................... 18
Thermal Performance .............................................................................................................. 18
Emissions..................................................................................................................................... 19
CO- Carbon monoxide.............................................................................................................. 19
CO2- Carbon dioxide................................................................................................................. 20
NOX (ppm)- Nitrous Oxide ....................................................................................................... 20
2|P ag e
Johnson Akanbi P2591881
, NO- Nitric Oxide....................................................................................................................... 21
O2- Oxygen .............................................................................................................................. 21
Energy balance and explanation of extra energy losses ................................................................ 22
Conclusion ................................................................................................................................... 22
Appendix ..................................................................................................................................... 23
Table of figures ........................................................................................................................ 23
Tables ...................................................................................................................................... 23
References .................................................................................................................................. 24
3|P ag e
Johnson Akanbi P2591881
