Completely solve and box the final answer. Write legibly. 10. An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The outside diameter of the pipe is 82 mm, and its surface temperature and emissivity are 200°C and 0.80 respectively. If the coefficient associated with free convection heat transfer from the surface to the air is 15W/m2-k, what is the rate of heat loss for a 5 meter pipe? Round the answer in 2 decimals.

Completely solve and box the final answer. Write legibly. 10. An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The outside diameter of the pipe is 82 mm, and its surface temperature and emissivity are 200°C and 0.80 respectively. If the coefficient associated with free convection heat transfer from the surface to the air is 15W/m2-k, what is the rate of heat loss for a 5 meter pipe? Round the answer in 2 decimals.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.77P: 1.77 Explain each in your own words. (a) What is the mode of heat transfer through a large steel...

See similar textbooks

Similar questions

Completely solve and box the final answer. Write legibly 7. Calculate the specific heat of a substance in BTU/lbm-ºR if 17.8 pounds can raise its temperature from 71.4 ºF to 118.5ºF in a period of 1.12 minutes. The computed amount of heat applied to it is 4.79 HP.
Completely solve and box the final answer. Write legibly 3. Determine the heat loss in KW of a vertical furnace made up of inner wall of firebrick 28 cm thick followed by insulating brick 18 cm thick and an outer wall of steel 1.5 cm thick. Surface temperature of the wall adjacent to the combustion chamber is 895ºC while that of the outer surface of steel is 42ºC. Use a thermal conductivity of wall in W/m-ºK for firebrick, insulating brick and steel to be 14, 0.92, and 52 respectively. The cross section is 2.5 m x 7.5 m.
Completely solve and box the final answer. Write legibly 9. There are 9.5 lbs of brass with specific heat of 0.095 BTU/lbm-ºR at a temperature of 295ºF being dropped into 2.95 gallons of water at 95ºF. Compute the resultant temperature of the mixture in degrees F.
Completely solve and box the final answers. Write legibly 1. A group of 150 persons are inside a room 30 m x 20 m x 4 m which is completely sealed off and insulated. Each person gives off 150 kCal/hr of heat and occupies a volume of 0.25 cubic meter. If the room has an initial temperature of 16.5°C and standard atmospheric pressure, calculate the room temperature after 20 minutes in
Completely solve and box the final answer. Write legibly 1. How much heat will be transferred in KW if a hot gas at 175ºC crosses a wall 100-mm thick and cross-sectional dimensions of 25 cm x 52 cm. It leaves the wall at 52ºC. The thermal conductivity of the wall is 12.4 W/m-ºK?
The temperature of an experimental heated enclosure is being ramped up from 80 to 450°F at the rate of 19°F/min. A thermocouple, embedded in a Thermowell for protection, is being used to monitor the oven temperature. The thermocouple has a time constant of 84 s. At t = 10 min, what is the difference between the actual temperature and the temperature indicated by the thermocouple? Final answer in whole number. Please show your complete solution and write readable.
Using the information in Problem 1.22, estimate the ambient air temperature that could cause frostbite on a calm day on the ski slopes. 1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas gives both an air temperature and the wind-chill temperature. The air temperature is measured with a thermometer that is not affected by the wind. However, the rate of heat loss from the skier increases with wind velocity, and the wind-chill temperature is the temperature that would result in the same rate of heat loss in still air as occurs at the measured air temperature with the existing wind. Suppose that the inner temperature of a 3-mm-thick layer of skin with a thermal conductivity of 0.35W/mKis35C and the air temperature is 20C. Under calm ambient conditions the heat transfer coefficient at the outer skin surface is about 20W/m2K (see Table 1.4), but in a 40-mph wind it increases to 75W/m2K. If frostbite occurs when the skin temperature drops to about 10C, do you advise the skier to wear a face mask? What is the skin temperature drop due to the wind?
1.77 Explain each in your own words. (a) What is the mode of heat transfer through a large steel plate that has its surfaces at specified temperatures? (b) What are the modes when the temperature on one surface of the steel plate is not specified, but the surface is exposed to a fluid at a specified temperature?
An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The outside diameter of the pipe is 88 mm, and its surface temperature and emissivity are 200°C and 0.80 respectively. If the coefficient associated with free convection heat transfer from the surface to the air is 15W/m2-k, what is the rate of heat loss for a 5 meter pipe? Round your answer to 2 decimal places.
Solve correctly please. Water with a bulk temperature of 70 F flows through a 2-inch chart 80 steel pipe. The temperature of the steam condensing outside the pipe is 210 F and the heat transfer rate is 1600 Btu/h F Rr. If the heat transfer coefficient of the current flowing through the pipe is 400 Btu/hr F, calculate the heat transfer rate in kW for 1 m of pipe. (Gpt/ ai wrong answer not allowed)
Mean radiant temperature sketch for calculations Using the sketch above, calculate the MRT for Person B, if the temperature on the exterior glass wall is 14 o C, the temperature on the solid exterior wall is 17 o C and the temperature on the interior walls is 22 o C . Round to one decimal place at your answer only.
Completely solve and box the final answer. Write legibly. 9. A steam pipe having a surface temperature of 573 K passes through a room where the temperature is 25C. The outside diameter of pipe is 0.11 m and emissivity factor is 0.69 . Determine the radiated heat loss for a 5 m pipe length.