Explanation Write the expression for specific exergy for unit mass. e = ( u − u o ) + p o ( v − v o ) − T o ( s − s o ) + V 2 2 + g z Here, the specific exergy per unit mass is e , the specific internal energy is u , the specific volume is v , the specific entropy is s , the specific internal energy at dead state is u o , the specific volume at dead state is v o , the specific entropy at dead state is s o , the ambient pressure is p o , the ambient temperature is T o , the kinetic energy is V 2 2 and the potential energy is g z . Write the expression for specific flow exergy. e f = ( h − h o ) − T o ( s − s o ) + V 2 2 + g z Here, the specific flow exergy is e f , the specific enthalpy is h and the specific enthalpy at dead state is h o . Write the expression for specific enthalpy. h = u + p v Write the expression for specific enthalpy at dead state. h o = u o + p o v o Write the expression for time rate of exergy transfer accompanying mass flow. e ˙ m = m ˙ e Here, the time rate of exergy accompanying with mass flow is e ˙ m and the mass flow rate is m ˙ . Write the expression for time rate of exergy transfer accompanying flow work. e ˙ w = m ˙ ( p v − p o v ) Here, the time rate of exergy accompanying with flow work is e ˙ w . Write the expression for time rate of exergy transfer accompanying mass flow and flow work. e ˙ n e t = e ˙ m + e ˙ w (I) Here, the time rate of exergy transfer accompanying mass flow and flow work is e ˙ n e t Substitute m ˙ e for e ˙ m and m ˙ ( p v − p o v ) for e ˙ w in Equation (I)

Appendices to accompany Fundamentals of Engineering Thermodynamics, 8e

8th Edition

ISBN: 9781118957219

Author: Michael J. Moran, Howard N. Shapiro

Publisher: WILEY

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Chapter 7.7, Problem 9P

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The sum of exergy transfer by mass flow and exergy transfer by flow work.

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Chapter 7.7, Problem 8P

Chapter 7.7, Problem 10P

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Chapter 7 Solutions

Appendices to accompany Fundamentals of Engineering Thermodynamics, 8e

Ch. 7.7 - Prob. 1E Ch. 7.7 - Prob. 2E Ch. 7.7 - Prob. 3E Ch. 7.7 - 4. A pail of water initially at 20°C freezes when...Ch. 7.7 - Prob. 5E Ch. 7.7 - Prob. 6E Ch. 7.7 - 7. After a vehicle receives an oil change and lube...Ch. 7.7 - Prob. 8E Ch. 7.7 - Prob. 9E Ch. 7.7 - Prob. 10E

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