Question: An air-standard Diesel cycle has a compression ratio of 18.2. Air is at 80F and 14.7 psia at the beginning of the compression process and

An air-standard Diesel cycle has a compression ratio of 18.2. Air is at 80°F and 14.7 psia at the beginning of the compression process and at 3000 R at the end of the heat addition process. Accounting for the variation of specific heats with temperature, determine
(a) The cutoff ratio,
(b) The heat rejection per unit mass, and
(c) The thermal efficiency.

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