USE OF FINITETIME THERMODYNAMIC SIMULATION OF PERFORMANCE OF AN OTTO CYCLE WITH VARIABLE SPECIFIC HEATS OF WORKING FLUID

Abstract

A finitetime thermodynamic modelling and simulation of irreversible Otto cycle engines has been developed taking into account the variability of specific heats for working fluid due to temperature variation. The effect of three different parameters on the engine was discussed, which are: the internal irreversibility, the heat losses and the friction losses. A program was developed by using MATLAB software to perform the necessary calculations of thermodynamic model. According to the results obtained, it was found that the results obtained from the thermodynamic model compared with the results obtained from experiments are convergent, and may be used in actual engine designs and applications.