Explanation Write the expression for energy rate balance equation. ( W ˙ c v m ˙ ) + ( h 2 − h 1 ) = ( Q ˙ c v m ˙ ) (I) Here, the temperature is T , the enthalpy at state 1 is h 1 , the enthalpy at state 2 is h 2 , the rate of work transfer is W ˙ c v m ˙ and the rate of heat transfer is Q ˙ c v m ˙ . Write the expression for the enthalpy departure. h ¯ 2 − h ¯ 1 = h ¯ o ( T 2 ) − h ¯ o ( T 1 ) − R ¯ T c [ ( h ¯ * − h ¯ R T c ) 2 − ( h ¯ * − h ¯ R T c ) 1 ] (II) Here, the molar specific enthalpy at state 1 is h ¯ 1 , the molar specific enthalpy at state 2 is h ¯ 2 , the molar specific enthalpy at temperature T 1 is h ¯ o ( T 1 ) ,the molar specific enthalpy at temperature T 2 is h ¯ o ( T 2 ) , the enthalpy departure at state 2 is ( h ¯ * − h ¯ R T c ) 2 the universal gas constant is R ¯ , and enthalpy departure at state 1 is ( h ¯ * − h ¯ R T c ) 1 . Write the expression for specific enthalpy change. ( h 2 − h 1 ) × M = h ¯ 2 − h ¯ 1 Here, molecular weight is M . Substitute ( h 2 − h 1 ) × M for h ¯ 2 − h ¯ 1 in Equation (II). ( h 2 − h 1 ) × M = [ h ¯ o ( T 2 ) − h ¯ o ( T 1 ) − R ¯ T c [ ( h ¯ * − h ¯ R T c ) 2 − ( h ¯ * − h ¯ R T c ) 1 ] ] ( h 2 − h 1 ) = 1 M [ h ¯ o ( T 2 ) − h ¯ o ( T 1 ) − R ¯ T c [ ( h ¯ * − h ¯ R T c ) 2 − ( h ¯ * − h ¯ R T c ) 1 ] ] (III) Write the expression for reduced pressure at state 1. p R 1 = p 1 p C (IV) Here, the pressure at state 1 is p 1 , and the critical pressure of water vapor is p c . Write the expression for reduced pressure at state 2. p R 2 = p 2 p C (V) Here, the pressure at state 2 is p 1 . Write the expression for reduced temperature at state 1. T R 1 = T 1 T C (VI) Here, the temperature at state 1 is T 1 , and the critical temperature of water vapor is T C . Write the expression for reduced temperature at state 2. T R 2 = T 2 T C (VII) Here, the temperature at state 2 is T 2

Fundamentals of Engineering Thermodynamics

8th Edition

ISBN: 9781118832301

Author: SHAPIRO

Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT

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Chapter 11.9, Problem 86P

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The heat transfer per kg of nitrogen flowing.

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Chapter 11.9, Problem 85P

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Chapter 11 Solutions

Fundamentals of Engineering Thermodynamics

Ch. 11.9 - Prob. 1E Ch. 11.9 - Prob. 2E Ch. 11.9 - 3. What is an advantage of using the Redlich–Kwong...Ch. 11.9 - To determine the specific volume of superheated...Ch. 11.9 - Prob. 5E Ch. 11.9 - Prob. 6E Ch. 11.9 - Prob. 7E Ch. 11.9 - Prob. 8E Ch. 11.9 - Prob. 9E Ch. 11.9 - Prob. 10E

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