(a) Explanation Write the formula to calculate the thermal efficiency of the heat engine ( η t h ) . η t h = 1 − Q ˙ L Q ˙ H (I) Here, heat transferred to the heat engine from the high temperature reservoir, T H is Q ˙ H and heat rejected to a low temperature reservoir T L is Q ˙ L . Write the formula to calculate the power output of the heat engine ( W ˙ net,out ) . W ˙ net,out = η t h ( Q ˙ H ) (II) Conclusion: Substitute 0.55 for η t h , and 800 Btu / min for Q ˙ L in Equation (I). 0.55 = 1 − 800 Btu / min Q ˙ H 800 Btu / min Q ˙ H = 1 − 0 (b) To determine The absolute temperature of the high temperature reservoir.

8th Edition

ISBN: 9780073398174

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

Publisher: McGraw-Hill Education

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Question

Chapter 6.11, Problem 75P

(a)

To determine

The power output of the heat engine.

(b)

To determine

The absolute temperature of the high temperature reservoir.

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Chapter 6.11, Problem 74P

Chapter 6.11, Problem 76P

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Chapter 6 Solutions

Thermodynamics: An Engineering Approach

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