3-20 Water is boiling in a 25-cm-diameter aluminum pan (k 237 W/m K) at 95°C. Heat is transferred steadily to the boiling water in the pan through its 0.5-cm-thick flat bottom at a rate of 800 W. If theinner surface temperature of the bottom of the pan is 108°C, determine (a) the boiling heat transfer coefficient on the inner surface of the pan and (b) the outer surface temperature of the bottom of thepan.

Question
Asked Sep 20, 2019
268 views
3-20 Water is boiling in a 25-cm-diameter aluminum pan (k 237 W/m K) at 95°C. Heat is transferred steadily to the boiling water in the pan through its 0.5-cm-thick flat bottom at a rate of 800 W. If the
inner surface temperature of the bottom of the pan is 108°C, determine (a) the boiling heat transfer coefficient on the inner surface of the pan and (b) the outer surface temperature of the bottom of the
pan.
help_outline

Image Transcriptionclose

3-20 Water is boiling in a 25-cm-diameter aluminum pan (k 237 W/m K) at 95°C. Heat is transferred steadily to the boiling water in the pan through its 0.5-cm-thick flat bottom at a rate of 800 W. If the inner surface temperature of the bottom of the pan is 108°C, determine (a) the boiling heat transfer coefficient on the inner surface of the pan and (b) the outer surface temperature of the bottom of the pan.

fullscreen
check_circle

Expert Answer

Step 1

Assumption:

Consider system as Steady state and one dimensional since the thickness of the pan is very small compare to the bottom of the pan.

Step 2

a)

Calculate the boiling heat transfer coeffici...

help_outline

Image Transcriptionclose

Q h4, (T-T) Q h = 4. (Т, -Т.) D' (T. - Т.) 4 800 W (108° C -95° C) x(0.2 =1253.33 W/m2 .°C Thus, the boiling heat transfer coefficient is 1253.33 W/m2.°C

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Engineering

Mechanical Engineering

Related Mechanical Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: QUESTION 9 In a jet engine rotor the high pressure axial compressor rotates at a speed of 15000 rpm....

A:  Write the expression to calculate the polytropic efficiency of compressor.

question_answer

Q: As shown in the figure below, 0.7 kg of water is contained within a piston–cylinder assembly at 100°...

A: Given:Mass of water mw = 0.7 KgMass of piston m = 50 KgArea A =0.01 m2Assembly temperature T =100° C...

question_answer

Q: Technician A says that the front bearing assembly locknuts for RWD vehicles are typically heavily to...

A: A high torque for maintaining the bearing adjustment is required in the FWD vehicles and not the RWD...

question_answer

Q: Mechanical Engineering Question

A: Draw the velocity diagram for the link AB. 

question_answer

Q: Motion of the roller A against its restraining spring is controlled by the downward motion of the pl...

A: Draw the velocity diagram for the given position.

question_answer

Q: In steam power plants, open feedwater heaters are frequently utilized to heat the feedwater by mixin...

A: Pressure at which open feedwater heater operates = 1200 kPaThe temperature of feed water = 50oCThe p...

question_answer

Q: 2. Water at standard atmospheric pressure and temperature fills a sealed, rigid container. If the te...

A: Temperature of the water will be 50CAssume the general parameters as P=pressure, V=volume,T=temperat...

question_answer

Q: A vapor-compression refrigeration system circulates Refrigerant 134a at a rate of 0.15 kg/s. The ref...

A: Given refrigerant R-134a compressor at inlet isso consider the isentropic enthalpy at compressor exi...

question_answer

Q: Steam enters a turbine a 3 MPa and 500 degrees C, then expands in a reversible adiabatic process and...

A: Given Data:Process: reversible adiabatic process