Abstract:
The present thesis reports the exergestic analysis of a four stroke spark ignition
internal combustion engine fuelled by four fuels namely octane, methane, hydrogen
and methanol. A thermodynamic model has been developed and simulation is done
using FORTRAN 95 programming language. The model includes finite heat release,
convective heat loss from engine cylinder, frictional loss and temperature dependant
thermodynamic properties. Thermodynamic state and composition of gases inside the
cylinder during thermodynamic cycle are calculated. Different performance
parameters are estimated. The change in exergy through key processes of ideal
thermodynamic cycle is calculated. Analysis of the results show that around 10 to
15% of the fuel exergy is destroyed during combustion & 25 to 35% is left unused at
the end of the expansion stroke which is exhausted to the atmosphere.
