To determine The maximum theoretical rate of electricity generation in MW . Explanation Write the expression for steady state control volume exergy rate balance. 0 = ( 1 − T o T ) Q ˙ − W ˙ + m ˙ ( e f i − e f e ) − E ˙ d (I) Here, the ambient temperature is T o , the temperature of system is T , heat transfer rate from surrounding is Q ˙ , the work is W ˙ , mass flow rate is m ˙ , specific flow exergy at the inlet of control volume is e f i , specific flow exergy at the exit of control volume is e f e and the rate of exergy destruction is E ˙ d . As the exit state of water is dead state, there will be zero specific flow exergy at exit of control volume. Write the expression for specific flow exergy at the inlet of control volume. e f i = ( h − h o ) − T o ( s − s o ) + V 2 2 + g z (II) Here, the specific flow exergy is e f i , the specific entropy is s , the specific entropy at dead state is s o , the ambient temperature is T o , the velocity is V , the height from datum is z , the specific enthalpy is h and the specific enthalpy at dead state is h o . The inlet specific enthalpy of fluid is same as the specific enthalpy at dead state and the inlet specific entropy is same as the specific entropy of dead state. Substitute h o for h , s o for s and ignoring the kinetic energy term in Equation (II). e f i = ( h o − h o ) − T o ( s o − s o ) + g z = g z Conclusion: Substitute T o for T , 0 for Q ˙ , 0 for e f e , g z for e f i in Equation (I)

Fundamentals of Engineering Thermodynamics

8th Edition

ISBN: 9781118832301

Author: SHAPIRO

Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT

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Chapter 7.7, Problem 52P

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The maximum theoretical rate of electricity generation in MW.

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Fundamentals of Engineering Thermodynamics

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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