a) Explanation Draw the given diesel cycle on P − v diagram as in Figure (1). Write the formula for the compression ratio r . r = v 1 v 2 (I). Here, specific volume at state 1 is v 1 and specific volume at state 2 is v 2 . Write the relationship between the specific volume and relative specific volume relation for the isentropic compression process 1-2. v r 2 = v 2 v 1 v r 1 Plug in Equation (I) in Equation. v r 2 = 1 r v r 1 (II) Here, relative pressure at state 2 is v r 2 . Write the formula for the ideal gas relation for the constant pressure heat addition process 2-3. P 3 v 3 T 3 = P 2 v 2 T 2 For the process 2-3, P 2 and P 3 are equal. v 3 v 2 = T 3 T 2 (III) Conclusion. Refer table A-17E, “ideal gas properties of the air”, obtain the below properties at the temperature at state 1 of 580 R b) To determine The heat rejected by the air standard diesel cycle. c) To determine The thermal efficiency of the given diesel cycle.

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Author: CENGEL

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Chapter 9.12, Problem 52P

To determine

The cutoff ratio for the given air standard diesel cycle

To determine

The heat rejected by the air standard diesel cycle.

To determine

The thermal efficiency of the given diesel cycle.

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Chapter 9.12, Problem 51P

Chapter 9.12, Problem 53P

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The cutoff ratio for the given air standard diesel cycle

Solution Summary: The author explains the cutoff ratio for the given air standard diesel cycle.

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The cutoff ratio for the given air standard diesel cycle

The heat rejected by the air standard diesel cycle.

The thermal efficiency of the given diesel cycle.

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Chapter 9 Solutions