The instantaneous heat transfer models used in the calculation of energy indicators, and the emissions, for this model variation in heat flow over time is necessary, while the spatial distribution is less important.
As reported by Stone, the performance parameters of the engine are not sensitive to heat transfer calculations. A calculation error in the calculation of 10% of the cylinder heat exchanger leads to 1% error in the calculation of performance and engine power.
However, the emissions are very sensitive to temperature; In fact, the formation of NOx increases with surface temperature of the combustion chamber. Also, calculate the surface temperature in the combustion chamber parts also affected by heat flow and heat transfer models to the coolant.
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