Abstract

An energy-exergy analysis for a diesel engine has been conducted. Both First and Second Laws of Thermodynamics are employed to take into account the quantity and quality of energy. The availability or exergy analysis based on the Second Law is utilized to identify the source of losses in useful energy within the components of diesel engines. This shows about 50% of the chemical availability of the fuel is destroyed due to uncounted factors and about 15% is lost in the cooling water or exhaust gases. On the other hand, the energy analysis shows 50% is wasted in the cooling water and exhaust gases and 15% is lost due to uncounted factors.

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