Question

2) Ceiling outer surface temperature of an oven is 60̊C. The furnace is located in an...

2) Ceiling outer surface temperature of an oven is 60̊C. The furnace is located in an environment of 20 ̊C, and if the width of the ceiling is 1m in length and 2 m, find the heat loss from the ceiling surface of the furnace.
NOTE: Use the physical properties of the air at 40oC for the medium.

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

Homework Answers

Answer #1

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
A horizontal pipe with an outer surface temperature of 80 * C and an outside diameter...
A horizontal pipe with an outer surface temperature of 80 * C and an outside diameter of 100 mm is located in a room at atmospheric pressure at 20 ° C. Find the required pipe length for the loss of heat from the pipe to 1 kW. (Physical properties for air k = 0.0287 W / mK, Pr = 0.70, v = 19x10-6 m² / s)
The wall of an industrial furnace is constructed from a fireclay brick layer which is covered...
The wall of an industrial furnace is constructed from a fireclay brick layer which is covered with another layer of ordinary brick. The outer surface wall temperature has a steady-state temperature of 110 °C when the ambient air has a temperature of 20°C. Heat is lost from the outer surface wall via convection and radiation. The internal furnace wall has a surface temperature of 500 DegreeC. Convection heat transfer coefficient between outer wall and air: 5 W/m2K Stefan-Boltzmann constant σ:...
A 0.2 m^3 oven is heated from 20◦C to 200◦C. The initial pressure inside the oven...
A 0.2 m^3 oven is heated from 20◦C to 200◦C. The initial pressure inside the oven (same as outside is 950 hPa). a) If the oven is sealed (i.e., density does not change), how much heat is added to the oven? b) Most ovens end up leaking air out into the environment in a way that maintains the pressure. How much heat is added to increase the temperature in this case? As a reminder, you need to account for the...
In casting furnace, the combustion gases are separated from the surrounding air by a wall with...
In casting furnace, the combustion gases are separated from the surrounding air by a wall with a thickness of 12 cm, 1.2 W/m.K, and 0.85 as emissivity. Calculate the inner surface of the wall since the outer surface temperature of the inner wall, where the air has 273 K and 25 2 W/? . ? as a coefficient of convective heat transfer. Problem #2 (5 points) Expect that
A spherical tank, 1.5 m in diameter, is maintained at a temperature of 120 ◦C and...
A spherical tank, 1.5 m in diameter, is maintained at a temperature of 120 ◦C and exposed to a convection environment with heat transfer coefficient, h=15 W/m2 ◦C and T∞ =20 ◦C. For the same surface temperature of the tank, it is desired to insulate the tank in order to decrease the heat loss by 45 percent, determine the thickness of insulation layer (k=0.2 W/m ◦C ) and the outer surface temperature.
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...
there is a plate with 2ft width, 4ft length and 130°F of the surface temperature. awater...
there is a plate with 2ft width, 4ft length and 130°F of the surface temperature. awater with 50°F of temperature flows on this plate with 9ft/s velocity. Calculate the average heat transfer coefficient and the convective heat loss in this plate. For the calculation please use the following constant properties. heat conductivity(k)=0.36 Btu/(hr ft °F) viscosity=5.14×10^(-4) lbm/(ft s) density=62.11 lbm/(ft^(3)) Pr=5.12 Nu=0.036×Pr^(1/3)×Re^(2/3):laminar flow Nu=0.036×Pr^(1/3)×(Re^(0.8)-23200):turbulent flow
A long 8-cm-diameter steam pipe whose external surface temperature is 90°C passes through some open area...
A long 8-cm-diameter steam pipe whose external surface temperature is 90°C passes through some open area that is not protected against the winds. Determine the rate of heat loss from the pipe per unit of its length when the air is at 1 atm pressure and 7°C and the wind is blowing across the pipe at a velocity of 47 km/h. The properties of air at 1 atm and the film temperature of (Ts + T∞)/2 = (90 + 7)/2...
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...
The walls of an oven are made from steel sheets with insulating board between them of...
The walls of an oven are made from steel sheets with insulating board between them of thermal conductivity 0.18 J m-1 s-1 °C-1. If the maximum internal temperature in the oven is 300°C and the outside surface of the oven wall must not rise above 50°C, estimate the minimum necessary thickness of insulation assuming surface heat transfer coefficients to the air on both sides of the wall are 15 J m-2 s-1 °C-1. Assume the room air temperature outside the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT