Explanation Write the expression for the change in entropy. s 2 − s 1 = c P ln ( T 2 T 1 ) − R ln ( P 2 P 1 ) Here, temperature at state 1 and 2 are T 1 and T 2 , pressure at state point 1 and 2 are P 1 and P 2 . s 2 − s 1 = ( 0.917 kJ / kg ⋅ K ) ln ( 450 K 300 K ) − ( 0.1889 kJ / Kg ⋅ K ) ln ( 600 kPa 100 kPa ) = 0.03335 kJ / kg ⋅ K Express the minimum power required by the compressor. W ˙ rev,in = m ˙ [ c P ( T 2 − T 1 ) − T 0 ( s 2 − s 1 ) ] (I) Here, mass flow rate is m ˙ , initial and final temperature is T 1 and T 2 respectively, surrounding temperature is T 0 and initial and final specific entropy is s 1 and s 2 respectively

8th Edition

ISBN: 9781307434316

Author: CENGEL

Publisher: INTER MCG

See similar textbooks

Videos

Question

Chapter 8.8, Problem 60P

To determine

The minimum power required by the compressor.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 8.8, Problem 59P

Chapter 8.8, Problem 61P

Students have asked these similar questions

||! Sign in MMB241 - Tutorial L9.pd X PDF MMB241 - Tutorial L10.pX DE MMB241 - Tutorial L11.p x PDF Lecture W12 - Work and X File C:/Users/KHULEKANI/Desktop/mmb241/MMB241%20-%20Tutorial%20L11.pdf PDE Lecture W11 - Power and X Draw Alla | Ask Copilot ++ 3 of 3 | D 6. If the 50-kg load A is hoisted by motor M so that the load has a constant velocity of 1.5 m/s, determine the power input to the motor, which operates at an efficiency € = 0.8. 1.5 m/s 2 7. The sports car has a mass of 2.3 Mg, and while it is traveling at 28 m/s the driver causes it to accelerate at 5m/s². If the drag resistance on the car due to the wind is FD= 0.3v²N, where v is the velocity in m/s, determine the power supplied to the engine at this instant. The engine has a running efficiency of P = 0.68. 8. If the jet on the dragster supplies a constant thrust of T-20 kN, determine the power generated by the jet as a function of time. Neglect drag and rolling resistance, and the loss of fuel. The dragster has a mass of 1…

Q | Sign in PDE Lecture W09.pdf PDF MMB241 - Tutorial L9.pdi X PDF MMB241 - Tutorial L10.p X PDF MMB241 - Tutorial L11.p X Lecture W12-Work and X + File C:/Users/KHULEKANI/Desktop/mmb241/Lecture%20W12%20-%20Work%20and%20Energy.pdf ||! Draw | IA | a | Ask Copilot Class Work + 33 of 34 D Question 1 The engine of a 3500-N car is generating a constant power of 50 hp (horsepower) while the car is traveling up the slope with a constant speed. If the engine is operating with an efficiency of € 0.8, determine the speed of the car. Neglect drag and rolling resistance. Use g 9.81 m/s² and 1 hp = 745.7 W. 10 го Question 2 A man pushes on a 60-N crate with a force F. The force is always directed downward at an angle of 30° from the horizontal, as shown in the figure. The magnitude of the force is gradually increased until the crate begins to slide. Determine the crate's initial acceleration once it starts to move. Assume the coefficient of static friction is μ = 0.6, the coefficient of kinetic…

state is Derive an expression for the volume expansivity of a substance whose equation of RT P = v-b a v(v + b)TZ where a and b are empirical constants.

Chapter 8 Solutions

THERMODYNAMICS(SI UNITS,INTL.ED)EBOOK>I

Ch. 8.8 - What final state will maximize the work output of...Ch. 8.8 - Is the exergy of a system different in different...Ch. 8.8 - How does useful work differ from actual work? For...Ch. 8.8 - Prob. 4P Ch. 8.8 - Consider two geothermal wells whose energy...Ch. 8.8 - Consider two systems that are at the same pressure...Ch. 8.8 - Prob. 7P Ch. 8.8 - Does a power plant that has a higher thermal...Ch. 8.8 - Prob. 9P Ch. 8.8 - 8–10C Can a process for which the reversible work...

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.