Question

The temperature of two infinite length parallel plates is 575 oC and 25 oC and the...

The temperature of two infinite length parallel plates is 575 oC and 25 oC and the radiation emission coefficient is 0.85 and 0.75, respectively. Find the radiation emission coefficient of the radiation shield to be placed between these two plates to reduce the heat radiation by 5 times.

Engineering   Mechanical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

i had solved your question so please rate me thumbs up for the solution.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
2. Two parallel plastic plates 1 and 2 with large surface areas are maintained at uniform...
2. Two parallel plastic plates 1 and 2 with large surface areas are maintained at uniform temperatures of T1=900 K and T2=650 K, respectively. Their emissivities are ?1 = 0.5 and ?2 = 0.8, respectively. A thin aluminium sheet with an emissivity of 0.15 on both sides is placed between these two plates. The plates exchange heat with each other and with the aluminium sheet, but only the plate surface facing each other are to be considered. Determine the reduction...
1. An oven chimney is made of brick with a heat transmission coefficient 1.1 W/mK 10...
1. An oven chimney is made of brick with a heat transmission coefficient 1.1 W/mK 10 cm thick. Since the shaft exterior radiation beam coefficient is 0.8 and the flue gas temperature is 350°C, the external ambient temperature is 25°C and the outer ambient heat transport coefficient is 20 W/m2K; a) Calculate the shaft exterior temperature. b) In order to reduce the risk of burn injury that may occur in the body, the shaft is asked to be below 55°Cve...
Imagine that Jae has two infinite size metal plates with an opposite charge and has placed...
Imagine that Jae has two infinite size metal plates with an opposite charge and has placed them parallel with respect to each other. Calculate the size of the electric field in terms of the area charge density of the plate. Estimate the same when one of plate has nine times of the charge density of the other. Assume that the permittivity constant is unity. Please explain thoroughly and write neatly!
Consider two infinite plates, both parallel to the xy plane of a coordinate system. The top...
Consider two infinite plates, both parallel to the xy plane of a coordinate system. The top plate is at the height z = +5cm and carries a uniform charge distribution of ?= +3nC/m2. The bottom plate is at height z = - 5cm and carries a uniform charge distribution of ?= -3nC/m2. The space between the plates is filled with air. Between the plates runs a long wire along the y-axis (at z=0 and x=0), carrying a current of 10A....
Two large parallel horizontal metal plates are separated by a 2.5 cm air gap, with the...
Two large parallel horizontal metal plates are separated by a 2.5 cm air gap, with the air at an average temperature of 100°C. How much hotter may the lower plate be (than the upper plate) without causing the onset of free convection in the gap? How much may this temperature difference be increased if a very thin metal sheet is placed midway between the two plates?
A capacitor is made of two oppositely charged circular parallel conducting plates with side-length of 1.00m...
A capacitor is made of two oppositely charged circular parallel conducting plates with side-length of 1.00m and separation distance 2.00mm. A circular dielectric of side-length is 0.05m and with a dielectric constant, K is 2.4 and thickness of 2.00mm is inserted in the center of the capacitor. 1. Find the capacitance.
An electron beam is passed through two charged parallel plates of length L = 20 cm...
An electron beam is passed through two charged parallel plates of length L = 20 cm and is seen to be deflected by a vertical distance d = 2.5 cm by the time it reaches the end of the plates. If the area between the plates is then filled with a uniform magnetic field B = 10-5 T pointing into the page, the electron beam is observed to be undeflected. What is the speed of the electrons? a) 1.41x106 m/s...
The fluid of density 2300kg/m3 and viscosity of 10-3 m2/s is placed between two parallel plates...
The fluid of density 2300kg/m3 and viscosity of 10-3 m2/s is placed between two parallel plates where the distance between two plates is 8 mm. the length of the top and the bottom plate is 4.5m. The top plate is moved and the shear stress is measured to be 1540Pa. Estimate the value of the flow Reynolds number. Draw the appropriate figure and explain the type of flow.
Two large parallel horizontal metal plates are separatedby a 2.5 cm air gap, with the air...
Two large parallel horizontal metal plates are separatedby a 2.5 cm air gap, with the air at an average temperatureof 100°C. How much hotter may the lower plate be (than the upper plate) without causing the onset of free convection in the gap? How much may this temperature difference be increased if a very thin metal sheet is placed midway between the two plates?
2.1Consider a solid cylindrical rod of length 0.15 m and diameter 0.05 m. The top and...
2.1Consider a solid cylindrical rod of length 0.15 m and diameter 0.05 m. The top and bottom surfaces of the rod are maintained at constant temperatures of 20oC and 95oC, respectively, while the side surface is perfectly insulated. 2.1.1 Draw a diagram to represent the situation described above. (3) 2.1.2 Determine the rate of heat transfer through the rod if it is made of copper, k = 380 W/m? oC. (4) 2.1.3 Determine the rate of heat transfer through the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT