Performance analysis of air-standard Diesel cycle using an alternative irreversible heat transfer approach

This study presents the investigation of air-standard Diesel cycle under irreversible heat transfer conditions. The effects of various engine parameters are presented. An alternative approach is used to evaluate net power output and cycle thermal efficiency from more realistic parameters such as air–fuel ratio, fuel mass flow rate, intake temperature, engine design parameters, etc. It is shown that for a given fuel flow rate, thermal efficiency and maximum power output increase with decreasing air–fuel ratio. Also, for a given air–fuel ratio, the maximum power output increases with increasing fuel rate. However, the effect of the thermal efficiency is limited.