To8.2212T₁31.2.3.4" Common Brick1/2" OSB Sheathing3-1/2" x 1-1/2" (2x4) Yellow PineStudding placed on 16" center4.5.3-1/2" Figerglass Insulation1/2" DrywallA wall of a house as shown in theaccompanying sketch is 10 ft. high and 30ft. long and has no windows. The outsideheat transfer coefficient, h., is 6.0 Btu/hrft2°F and the inside convective heat transfercoefficient hi is 1.45 Btu/hr ft²°F.6.Calculate the heat loss through thewall if the house is heated such that theroom air temperature, Ti, is 70°F on a daywhen the outside air temperature, T., is 0°F.State all assumptions and list the thermalresistances and thermal conductivities foreach selection of the wall.For this problem, what would be the7.value of the overall heat transfer coefficient, U?Ans: U = 0.056 Btu/hr ft2°FYou are asked to design a metal hot dog holder for roasting hot dogs over an opencampfire. The holder is to be designed such that while the end holding the hot dogbecomes cherry red (1400°F), the other end can still be held without using aninsulated handle or glove (~95°F). Design it such that it can be used even on awarm, still day, T₁ = 90°F (Assume the convective heat transfer coefficient, h, fora horizontal cylinder is uniform over the whole cylinder and equal to 4.0Btu/hrft2°F)

To Find : The heat loss through the wall. Given : The thermal conductivity of materials are, For…

To Z 1 2 T₁ 1. 2. 3. 4" Common Brick 1/2" OSB Sheathing 3-1/2" x 1-1/2" (2x4) Yellow Pine Studding placed on 16" center 4. 5. 3-1/2" Figerglass Insulation 1/2" Drywall A wall of a house as shown in the accompanying sketch is 10 ft. high and 30 ft. long and has no windows. The outside heat transfer coefficient, h., is 6.0 Btu/hr ft2°F and the inside convective heat transfer coefficient hi is 1.45 Btu/hr ft²°F. 6. Calculate the heat loss through the wall if the house is heated such that the room air temperature, Ti, is 70°F on a day when the outside air temperature, T., is 0°F. State all assumptions and list the thermal resistances and thermal conductivities for 3 each selection of the wall.

To Z 1 2 T₁ 1. 2. 3. 4" Common Brick 1/2" OSB Sheathing 3-1/2" x 1-1/2" (2x4) Yellow Pine Studding placed on 16" center 4. 5. 3-1/2" Figerglass Insulation 1/2" Drywall A wall of a house as shown in the accompanying sketch is 10 ft. high and 30 ft. long and has no windows. The outside heat transfer coefficient, h., is 6.0 Btu/hr ft2°F and the inside convective heat transfer coefficient hi is 1.45 Btu/hr ft²°F. 6. Calculate the heat loss through the wall if the house is heated such that the room air temperature, Ti, is 70°F on a day when the outside air temperature, T., is 0°F. State all assumptions and list the thermal resistances and thermal conductivities for 3 each selection of the wall.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

To
8.
22
1
2
T₁
3
1.
2.
3.
4" Common Brick
1/2" OSB Sheathing
3-1/2" x 1-1/2" (2x4) Yellow Pine
Studding placed on 16" center
4.
5.
3-1/2" Figerglass Insulation
1/2" Drywall
A wall of a house as shown in the
accompanying sketch is 10 ft. high and 30
ft. long and has no windows. The outside
heat transfer coefficient, h., is 6.0 Btu/hr
ft2°F and the inside convective heat transfer
coefficient hi is 1.45 Btu/hr ft²°F.
6.
Calculate the heat loss through the
wall if the house is heated such that the
room air temperature, Ti, is 70°F on a day
when the outside air temperature, T., is 0°F.
State all assumptions and list the thermal
resistances and thermal conductivities for
each selection of the wall.
For this problem, what would be the
7.
value of the overall heat transfer coefficient, U?
Ans: U = 0.056 Btu/hr ft2°F
You are asked to design a metal hot dog holder for roasting hot dogs over an open
campfire. The holder is to be designed such that while the end holding the hot dog
becomes cherry red (1400°F), the other end can still be held without using an
insulated handle or glove (~95°F). Design it such that it can be used even on a
warm, still day, T₁ = 90°F (Assume the convective heat transfer coefficient, h, for
a horizontal cylinder is uniform over the whole cylinder and equal to 4.0
Btu/hrft2°F)

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