Question

An electrical heater in the form of a horizontal disk of 500-mm diameter is used to...

An electrical heater in the form of a horizontal disk of 500-mm diameter is used to heat the bottom of a tank filled with engine oil at a temperature of 10°C. Calculate the power required to maintain the heater surface temperature at 65°C.

The answer should be close to 589 W

Please show all work clearly

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
An electric immersion heater, 10 mm in diameter and 300 mm long, is rated at 550...
An electric immersion heater, 10 mm in diameter and 300 mm long, is rated at 550 W. If the heater is horizontally positioned in a large tank of water at 20 °C, estimate its surface temperatures. Estimate the surface temperature if the heater is accidentally operated in air at 20 °C.
A 20-mm-diameter sphere is suspended in a dry airstream with a temperature of 22ºC. The power...
A 20-mm-diameter sphere is suspended in a dry airstream with a temperature of 22ºC. The power supplied to an embedded electrical heater within the sphere is 2.71 W when the surface temperature is 32ºC. How much power is required to maintain the sphere at 32ºC if its outer surface has a thin porous covering saturated with water? Evaluate the properties of air and the diffusion coefficient of the air–water vapor mixture at 300 K.
A 12 meter long and 12 mm inner diameter smooth pipe is used to heat a...
A 12 meter long and 12 mm inner diameter smooth pipe is used to heat a liquid in an industrial process. The liquid enters the pipe at a temperature of 25o C and a mean velocity of 0.80 m/s. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the pipe so that the fluid exits at 75o C. The fluid average properties are ? = 1000 kg/m3 , Cp = 4000 J/kg·K,...
Used engine oil flows at 0.025 m/s through a 12.5-mm-diameter tube. The oil enters the tube...
Used engine oil flows at 0.025 m/s through a 12.5-mm-diameter tube. The oil enters the tube at a temperature of 27 ºC, while the tube surface temperature is maintained at 87º C. Determine the oil outlet temperature for a 100-m and the total heat transfer.
Consider the electrical heater of Problem 7.49. If the blower were to malfunction, terminating airflow while...
Consider the electrical heater of Problem 7.49. If the blower were to malfunction, terminating airflow while the heater continued to operate at 1000 W/m, what tem- perature would the heater assume? How long would it take to come within 10 C of this temperature? Allow for radiation exchange between the heater ( 0.8) and the duct walls, which are also at 27 C. 7.49) Along,cylindrical,electricalheatingelementofdiameter D 10 mm, thermal conductivity k 240 W/m K, den- sity 2700 kg/m3, and specific...
Dry air at 35°C and a velocity of 20 m/s flows over a wetted plate of...
Dry air at 35°C and a velocity of 20 m/s flows over a wetted plate of length 500 mm and width 150 mm. An embedded electrical heater supplies power to maintain the plate surface temperature at 20°C. What is the evaporation rate (kg/h) of water from the plate? What electrical power is required to maintain steady-state conditions? Determine the evaporation rate of water from the plate, in kg/h Determine the electrical power is required to maintain steady-state conditions, in W
A 10-mm diameter tube has a maintained surface temperature of 200°C. Engine oil enters the tube...
A 10-mm diameter tube has a maintained surface temperature of 200°C. Engine oil enters the tube at 70°C at a flow rate of 0.5 kg/s and exits at 105°C. Find the length, in m, of the tube and well as the corresponding heat transfer rate, in W. Assume fully developed flow and use the Dittus–Boelter equation to calculate the average Nusselt number. q = .    L =
A condenser is made up of a horizontal tube bank (0.75 m long, 200 mm diameter)....
A condenser is made up of a horizontal tube bank (0.75 m long, 200 mm diameter). Saturated steam at 143.3 kPa condenses on the outside surface of the tubes. The surface temperature is maintained at 90°C. Evaluate the condensation rate and heat transfer coefficient if the bank consists of 15 tubes.
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)
An aluminum transmission line with a diameter of 20 mm has an electrical resistance of R'elec=...
An aluminum transmission line with a diameter of 20 mm has an electrical resistance of R'elec= 2.636 × 10-4 Ω/m and carries a current of 700 A. The line is subjected to frequent and severe cross winds, increasing the probability of contact between adjacent lines, thereby causing sparks and creating a potential fire hazard for nearby vegetation. The remedy is to insulate the line, but with the adverse effect of increasing the conductor operating temperature. (a) Calculate the conductor temperature...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT