The T-s diagrams below approximate the Otto Cycle and Diesel Cycle, respectively

Question

The T-s diagrams below approximate the Otto Cycle and Diesel Cycle, respectively. Both cycles operate between 520 R and 4460 R. Analyze these cycles in a, manner similar to that used for the steam cycle, and determine for each: The heat input to the cycle (Btu/Ibm) The heat output from the cycle (Btu/Ibm) The net work from the cycle (Btu/Ibm) The cycle thermodynamic efficiency The efficiency of Carnot Cycle operating between the same temperature extremes Discuss any irreversible heat transfer that occurs in the engine.

Explanation / Answer

a)for otto 330.625 ; for diesel 435

b)for otto 143.75 ; for diesel 199.375

c)otto-> 186.875 ; diesel-> 235.625

d)otto-> 0.565 ; diesel-> 0.542

e)0.889

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