Explanation Write the expression for the energy balance equation for the closed system. E ˙ in − E ˙ out = ( d E d t ) system (I) Here, rate of net energy transfer in to the control volume is E ˙ in , rate of net energy transfer exit from the control volume is E ˙ out and rate of change in internal, kinetic and potential energies of system is ( d E / d t ) system . For steady state, the rate of change in internal, kinetic and potential energies of the system is zero. ( d E / d t ) system = 0 Substitute 0 for Δ E ˙ system in Equation (I). E ˙ in − E ˙ out = 0 E ˙ in = E ˙ out W ˙ elect, in = m ˙ air V out 2 2 (II) Here, rate of electric power input to the system is W ˙ elect, in , mass flow rate of the air is m ˙ air and output velocity of the air is V out . Write the formula to calculate mass flow rate of the air ( m ˙ air ) . m ˙ air = ρ V out A (III) Here, density of the air is ρ and area of the duct is A . Conclusion: Substitute 0.075 lbm / ft 3 for ρ , 22 ft / s for V out and 3 ft × 3 ft for A in Equation (III)

8th Edition

ISBN: 8220100257056

Author: CENGEL

Publisher: YUZU

See similar textbooks

Videos

Question

Chapter 2.8, Problem 48P

To determine

The minimum electric power consumption of the motor.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 2.8, Problem 47P

Chapter 2.8, Problem 49P

Students have asked these similar questions

1) Consider the robot, with six degrees of freedom, RRPRR, shown in the following figure.Place the axes through the denavit-hartenberg algorithm and obtain the respective parameter table for the first three joints. 2) Considering the robot from question 1, calculate.the. Determine the Homogeneous Transformation Matrix in relation to the Direct Kinematics of the robot, for the first three joints:b. Considering the first three joints of the robot and L1 and L2 equal to 200 mm:I. calculate the pose of the robot relative to the base, knowing the joint variableshave the following values: q1= 90°, q2= 0°, q3= 50mm:

Please do not rely too much on chatgpt, because its answer may be wrong. Please consider it carefully and give your own answer. You can borrow ideas from gpt, but please do not believe its answer.Very very grateful! Please do not copy other's work,i will be very very grateful!!

Don't use Artificial intelligence

Chapter 2 Solutions

EBK THERMODYNAMICS: AN ENGINEERING APPR

Ch. 2.8 - What is total energy? Identify the different forms...Ch. 2.8 - List the forms of energy that contribute to the...Ch. 2.8 - How are heat, internal energy, and thermal energy...Ch. 2.8 - What is mechanical energy? How does it differ from...Ch. 2.8 - Natural gas, which is mostly methane CH4, is a...Ch. 2.8 - Portable electric heaters are commonly used to...Ch. 2.8 - Prob. 7P Ch. 2.8 - Prob. 8P Ch. 2.8 - 2–9E Calculate the total potential energy, in Btu,...Ch. 2.8 - Prob. 10P

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.