IMPORTANCE OF HEAT TRANSFER


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IMPORTANCE OF HEAT TRANSFER
IMPORTANCE OF HEAT TRANSFERHeat transfer is a parasitic process that removes from the engine's cylinder, as thermal energy, a significant fraction of the fuel's chemical energy. It results in a loss in efficiency. It is an inherent loss because the peak burned gas temperature in the cylinder of an internal combustion engine is of order 2500 K. Maximum metal temperatures for the inside of the combustion chamber space are limited to much lower values by a number of considerations, and cooling for the cylinder head, cylinder, and piston must therefore be provided. These conditions lead to heat fluxes to the chamber walls that can reach as high as 10 MW/m2 during the combustion period. However, during other parts of the engine's operating cycle, the heat flux is cl…
Citation
John B. Heywood: Internal Combustion Engine Fundamentals, Second Edition. IMPORTANCE OF HEAT TRANSFER, Chapter (McGraw-Hill Professional, 2018), AccessEngineering Export