Explanation Write the energy rate balance equation. 0 = Q ˙ cv − W ˙ cv + m ˙ [ ( h 1 − h 2 ) + ( V 1 2 − V 2 2 ) 2 + g ( z 1 − z 2 ) ] (I) Here, the rate of heat transfer is Q ˙ cv , rate of work transfer is W ˙ cv , rate of mass flow is m ˙ , the enthalpy is h , velocity is V , gravitational acceleration is g , the elevation is z and the suffixes cv, 1 and 2 indicates control volume, initial and final state of the system respectively. Write the formula for change in enthalpy in terms of liquid condition. h 1 − h 2 = [ h f ( T 1 ) + v f ( T 1 ) [ p 1 − p sat ( T 1 ) ] ] − [ h f ( T 2 ) + v f ( T 2 ) [ p 2 − p sat ( T 2 ) ] ] (II) Here, the enthalpy of liquid corresponding to the temperature of T 1 is h f ( T 1 ) , the specific volume corresponding to the temperature of T 1 is v f ( T 1 ) , the pressure is p and the saturation pressure is p sat ; the suffixes 1 and 2 indicates the inlet and exit states of the liquid. It is given that there is no significant changes in the temperature, pressure and kinetic energy of the water. Hence, neglect the kinetic energy effect i.e. ( V 1 2 − V 2 2 ) 2 = 0 . When, there is no significant changes in the temperature, pressure of the water, the change in enthalpy becomes negligible. h 1 − h 2 = [ h f ( T 1 ) + v f ( T 1 ) [ p 1 − p sat ( T 1 ) ] ] − [ h f ( T 2 ) + v f ( T 2 ) [ p 2 − p sat ( T 2 ) ] ] = 0 Then the Equation (I) becomes as follows to obtain the heat transfer rate ( Q ˙ cv )

8th Edition

ISBN: 2818440116926

Author: MORAN

Publisher: WILEY CONS

See similar textbooks

Videos

Question

Chapter 4.12, Problem 65P

To determine

The rate of heat transfer between the pump and its surroundings, in hp and Btu/min.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 4.12, Problem 64P

Chapter 4.12, Problem 66P

Students have asked these similar questions

Quiz/An eccentrically loaded bracket is welded to the support as shown in Figure below. The load is static. The weld size for weld w1 is h1 = 4mm, for w2 h2=6mm, and for w3 is h3 -6.5 mm. Determine the safety factor (S.f) for the welds. F=29 kN. Use an AWS Electrode type (E100xx). 163 mm 133 mm 140 mm w3 wi

E W X FO FB F10 F11 F12 Home Q: Consider the square of Figure below.The left face is maintained at 100°C and the top face at 500°C, while the other two faces are exposed to an environment at1 00°C, h=10 W/m². C and k=10 W/m.°C. The block is 1 m square. Compute the temperature of the various nodes as indicated in Figure below and the heat flows at the boundaries. T= 500°C Alt Explain to me in detail how to calculate the matrix in the Casio calculator type (fx-991ES plus) T= 100°C 1 2 4 7 1 m- 3 1 m 5 6 T= 100°C 8 9

Which of the following sequences converge and which diverge? 1) a₁ = 2+(0.1)" 1-2n 2) a = 1+2n 1/n 3 16) a = n In n 17) an = n 1/n 1-5n4 3) an = n² +8n³ 18) an = √4" n n² -2n+1 n! 20) a = 4) an = 106 5) n-1 a₁ =1+(-1)" n+1 a-(+) (1-4) 6) = 7) a = 2n (-1)"+1 2n-1 21) an = n -A" 1/(Inn) 3n+1 22) a = 3n-1 1/n x" 23) a = , x>0 2n+1 3" x 6" 24) a = 2™" xn! 2n 8) a = n+1 πT 1 9) a„ = sin +- 2 n sin n 10) an = n 25) a = tanh(n) 26) a = 2n-1 27) a = tan(n) 1 -sin n n 11) a = 2" 28) an == " 1 + 2" In(n+1) 12) a = n (In n) 200 29) a = n 13) a = 8/n 14) a 1+ =(1+²)" 15) an 7 n = 10n 30) an-√√n²-n 1"1 31) adx nix

Chapter 4 Solutions

FUNDAMENTALS OF ENGINEERING THERMODYNAM

Ch. 4.12 - Prob. 1E Ch. 4.12 - 2. When a drip coffeemaker on-off switch is turned...Ch. 4.12 - Prob. 3E Ch. 4.12 - Prob. 4E Ch. 4.12 - Prob. 5E Ch. 4.12 - Prob. 6E Ch. 4.12 - Prob. 7E Ch. 4.12 - Prob. 8E Ch. 4.12 - Prob. 9E Ch. 4.12 - 10. How does the operator of a pumper-tanker fire...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

The rate of heat transfer between the pump and its surroundings, in hp and Btu/min .

Videos

The rate of heat transfer between the pump and its surroundings, in hp and Btu/min.

Want to see the full answer?

Chapter 4 Solutions