please answer my heat transfer problem thank you!! heat transfer problem a furnace wall is constructed...
please answer my heat transfer problem thank you!!
heat transfer problem
a furnace wall is constructed of firrebrick 6in thick. The temperature of the wall is 1300F, and the T outside of the wall is 175 F. If the mean thermal conductivity under these conditions is 0.17 BTU/h-ft-F, what is the rate of heat loss through a 10 ft2 wall of the surface?
ans. 3825 BTU/hr
Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Add Answer to:
please answer my heat transfer problem thank you!!
heat transfer problem
a furnace wall is constructed...
please answer my heat transfer problem thank you!! heat transfer problem for a furnace constructed with...
please answer my heat transfer problem thank you!! heat transfer problem for a furnace constructed with 0.7ft thick of fireclay brick having k=0.6 BTU/hr-ft-F and covered on the outer surface with a layer of insulating material of k=0.04BTU/hr-ft-F. The innermost surface is maintained at 1800 F while the outer surface of insulating material is maintained at 100 F, a. how thick must the insulator be to maintain a maximum allowable heat transfer rate of 300 BTU/hr-ft2 b. calculate the steady heat...
The surface of a furnace wall is at a temperature of 1350oC. The outside wall temperature...
The surface of a furnace wall is at a temperature of 1350oC. The outside wall temperature is 42oC. The furnace wall is made of 25 cm of refractory material having a thermal conductivity of 1.4 W/moK. The outside wall is steel, 1 cm thick with thermal conductivity of 47 W/moK. Calculate the thickness in meters of brick to be installed in between the refractory material and steel if its thermal conductivity is 0.28 W/moK and the heat loss is not...
Heat Transfer -A wall 20 cm thick is to be constructed from material that has an...
Heat Transfer
-A wall 20 cm thick is to be constructed from material that has an average thermal conductivity of 2 W/m C. The wall is to be insulated with 5cm material having an average thermal conductivity of 0.5W/m C. Assuming that the inner and outer surface temperatures of the insulated wall are 200 and 20°C, calculate the heat transfer per unit area and the intermediate Temperature between the insulation and the wall.
A pipe with insulation material is used to carry steam to an operating plant. The conditions...
A pipe with insulation material is used to carry steam to an operating plant. The conditions and dimensions for the system are as follows Variable Value Length of pipe, L 100 ft Inner diameter of pipe, Do 1 inch Outer diameter of pipe, D1 1.24 inches Outer diameter of insulation, D2 2 inches Inside film heat transfer coefficient for condensing saturated steam, ho 800 Btu/hr-ft2.oF Outside film heat transfer coefficient for air, ht 2 Btu/hr-ft2.oF Thermal conductivity of the pipe,...
Heat Transfer Problems 1. A window pane (1/8 inch thick) in an old house owned by...
Heat Transfer
Problems 1. A window pane (1/8 inch thick) in an old house owned by a professor is 3 ft. by 4 ft. He likes to be warm in the winter so the inside temperature is kept at 70 °F even when the outside temperature is 10 •F. For this problem assume the inside and outside temperatures are for the window surface. How much heat is transferred through the window (k=.54 BTU/hr ft ° F)? 2. A small heated...
A wall is constructed of two layers of sheetrock (k = 0.10 Btu/hr-ft-F°) separated by 12...
A wall is constructed of two layers of sheetrock (k = 0.10 Btu/hr-ft-F°) separated by 12 inches of fiberglass insulation (k = 0.020 Btu/hr-ft-F°). The two layers of sheetrock are 3/4 of an inch thick so the wall is sheetrock, insulation then sheetrock. What is the thermal resistance of this construction (there are no studs!) in units of hr-F°/Btu to three significant digits?
A 100 ft2 wall consists of 4 in of red brick (k = 0.38 Btu-ft/hr-ft-°F), 1...
A 100 ft2 wall consists of 4 in of red brick (k = 0.38 Btu-ft/hr-ft-°F), 1 inch of pine (k = 0.06 Btu-ft/hr- ft-°F) and 42 inch of plaster board (k = 0.30 Btu-ft/hr-ft-°F). The internal and external film heat transfer coefficients are 1.65 Btu/hr-ft-°F and 6.00 Btu/hr-ft-'F respectively. The inside and outside air temperatures are 72 °F and 30 °F respectively. The heat transfer rate is:
please show all steps and do both. if you dont do both problems please do problem...
please show all steps and do both. if you dont do both
problems please do problem 2 is more important .
Problem 2. (45 Points) Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer...
1. A ¾ inch (nominal), Schedule 40, mild steel pipe carries 40 psia steam through a...
1. A ¾ inch (nominal), Schedule 40, mild steel pipe carries 40 psia steam through a room having an air temperature of 80°F. The pipe is covered with a 0.125 ft thick layer of fiberglass insulation having a thermal conductivity of 0.037 Btu/(h ft ‘F). The hi value on the steam side of the pipe is 1000 Btu/h ft2 °F. The ho value on the outside of the insulation is 2.0 Btu/(h ft2 ’F). For the mild steel, k=26Btu/(ft H...
A 6 in. schedule 80 steel pipe (OD=6.62 in.) will be used to transport 450◦F steam...
A 6 in. schedule 80 steel pipe (OD=6.62 in.) will be used to transport 450◦F steam from a boiler house to a new process unit. The pipe will be buried at a depth of 3 ft (to the pipe centerline). The soil at the plant site has an average thermal conductivity of 0.4 Btu/h · ft · ◦F and the minimum expected ground surface temperature is 20◦F. Estimate the rate of heat loss per foot of pipe length for the...
Heat Transfer
-A wall 20 cm thick is to be constructed from material that has an average thermal conductivity of 2 W/m C. The wall is to be insulated with 5cm material having an average thermal conductivity of 0.5W/m C. Assuming that the inner and outer surface temperatures of the insulated wall are 200 and 20°C, calculate the heat transfer per unit area and the intermediate Temperature between the insulation and the wall.
A pipe with insulation material is used to carry steam to an operating plant. The conditions and dimensions for the system are as follows Variable Value Length of pipe, L 100 ft Inner diameter of pipe, Do 1 inch Outer diameter of pipe, D1 1.24 inches Outer diameter of insulation, D2 2 inches Inside film heat transfer coefficient for condensing saturated steam, ho 800 Btu/hr-ft2.oF Outside film heat transfer coefficient for air, ht 2 Btu/hr-ft2.oF Thermal conductivity of the pipe,...
Heat Transfer
Problems 1. A window pane (1/8 inch thick) in an old house owned by a professor is 3 ft. by 4 ft. He likes to be warm in the winter so the inside temperature is kept at 70 °F even when the outside temperature is 10 •F. For this problem assume the inside and outside temperatures are for the window surface. How much heat is transferred through the window (k=.54 BTU/hr ft ° F)? 2. A small heated...
A 100 ft2 wall consists of 4 in of red brick (k = 0.38 Btu-ft/hr-ft-°F), 1 inch of pine (k = 0.06 Btu-ft/hr- ft-°F) and 42 inch of plaster board (k = 0.30 Btu-ft/hr-ft-°F). The internal and external film heat transfer coefficients are 1.65 Btu/hr-ft-°F and 6.00 Btu/hr-ft-'F respectively. The inside and outside air temperatures are 72 °F and 30 °F respectively. The heat transfer rate is:
please show all steps and do both. if you dont do both
problems please do problem 2 is more important .
Problem 2. (45 Points) Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer...
Most questions answered within 3 hours.
-
For the following reaction, 0.128 moles of
potassium hydrogen sulfateare mixed with
0.504 moles of potassium...
asked 32 seconds ago -
1. What is the present value of $400, three years in the future
if the interest...
asked 33 minutes ago -
The labor force minus the number of employed equals the number
of unemployed.
a. True
b....
asked 2 hours ago -
Determine the mass in units of grams [g] of 0.49 moles [mol]
of a new fictitious...
asked 3 hours ago -
A horizontal mass of M=5kg is on a spring and stretched to
x=0.5m when released from...
asked 4 hours ago -
26 of 50
"I have worked at the Arizona Humane Society for ten years, and
have...
asked 4 hours ago -
Compare and contrast zero based budgeting and incremental (or
base year) budgeting.
asked 4 hours ago -
4 pts 10. Which of the following hypothesis would be MOST
difficult to test experimentally? Group...
asked 4 hours ago -
A business owner makes 1,000 items a day. Each day he or she
contributes eight hours...
asked 4 hours ago -
A
circular loop in the plane of a paper lies inca0.65 T magnetic
field pointing into...
asked 4 hours ago -
A business owner is trying to decide whether to buy, rent, or
lease office space and...
asked 4 hours ago -
Thermal Storage Solar heating of a house is much more efficient
if there is a way...
asked 5 hours ago