The present study is the comparative parametric energy and exergy analysis of a Proposed Diesel Brayton combined cycle (PCC) and a simple Diesel cycle (DC) by varying the compression ratio (r)and ratio of cut-off to stroke length (k) of Diesel cycle. Proposed Diesel Brayton combined cycle (PCC) consisting of Diesel cycle as topping cycle and Brayton cycle as bottoming cycle which is operated by the exhaust of topping cycle. The result shows that with increase of the compression ratio (r)and ratio of cut-off to stroke length (k), the net output in both PCC and DC increases as well as the exergy loss by the exhaust gasses also increases. The maximum enhancement in net output by PCC is observed as 9.8% at r = 25 when k =10%as compared to DC.
Key words: Compression Ratio, Pressure Ratio, Diesel Cycle, Brayton cycle, Exergy loss
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