Explanation Write the expression 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 expression for the cutoff ratio r c . r c = v 3 v 2 (II) Here, specific volume at state 3 is v 3 , and specific volume at state 2 is v 2 . Write the expression to calculate the thermal efficiency of the ideal diesel cycle ( η t h ) . η t h = 1 − 1 r k − 1 r c k − 1 k ( r c − 1 ) (III) Here, the compression ratio is r , and cutoff ratio is r c . Conclusion: From the Table A-2, “Ideal-gas specific heats of various common gases”, obtain the value of specific heat ratio ( k ) of air as 1.4. Substitute 2 L for ν 1 and 0.13 L for ν 2 in Equation (I)

9th Edition

ISBN: 9781259822674

Author: Yunus A. Cengel Dr., Michael A. Boles

Publisher: McGraw-Hill Education

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IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical ener…

Question

Chapter 9.12, Problem 195FEP

To determine

The thermal efficiency of the ideal diesel cycle.

(a) 41%

(b) 59%

(c) 66%

(d) 70%

(e) 78%

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Chapter 9.12, Problem 194FEP

Chapter 9.12, Problem 196FEP

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The thermal efficiency of the ideal diesel cycle. (a) 41 % (b) 59 % (c) 66 % (d) 70 % (e) 78 %

Solution Summary: The author analyzes the thermal efficiency of the ideal diesel cycle.

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The thermal efficiency of the ideal diesel cycle.

(a) 41%

(b) 59%

(c) 66%

(d) 70%

(e) 78%

Want to see the full answer?

Chapter 9 Solutions

The thermal efficiency of the ideal diesel cycle. (a) 41 % (b) 59 % (c) 66 % (d) 70 % (e) 78 %

Solution Summary: The author analyzes the thermal efficiency of the ideal diesel cycle.

Concept explainers

The thermal efficiency of the ideal diesel cycle. (a) 41% (b) 59% (c) 66% (d) 70% (e) 78%

Want to see the full answer?

Chapter 9 Solutions

The thermal efficiency of the ideal diesel cycle.

(a) 41%

(b) 59%

(c) 66%

(d) 70%

(e) 78%