With increasing emphasis on energy conservation, the heat loss from buildings has become a major concern. For a small tract house the typical exterior surface areas and R-factors (area x thermal resistance) are listed below Element Area (m²) R-Factors = Area > Thermal Resistance [(m² K/W)] 2.0 2.8 Walls Ceiling Floor Windows Doors 150 120 120 20 5 2.0 0.1 0.5 (a) Calculate the rate of heat loss from the house when the interior temperature is 22°C and the exterior is -5°C. (b) Suggest ways and means to reduce the heat loss and show quantitatively the effect of doubling the wall insulation and the substitution of double glazed windows (thermal resistance = 0.2 m² K/W) for the single glazed type in the table above.
With increasing emphasis on energy conservation, the heat loss from buildings has become a major concern. For a small tract house the typical exterior surface areas and R-factors (area x thermal resistance) are listed below Element Area (m²) R-Factors = Area > Thermal Resistance [(m² K/W)] 2.0 2.8 Walls Ceiling Floor Windows Doors 150 120 120 20 5 2.0 0.1 0.5 (a) Calculate the rate of heat loss from the house when the interior temperature is 22°C and the exterior is -5°C. (b) Suggest ways and means to reduce the heat loss and show quantitatively the effect of doubling the wall insulation and the substitution of double glazed windows (thermal resistance = 0.2 m² K/W) for the single glazed type in the table above.
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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Question
![With increasing emphasis on energy conservation, the heat loss from buildings has
become a major concern. For a small tract house the typical exterior surface areas and
R-factors (area x thermal resistance) are listed below
Element
Area (m²)
R-Factors = Area > Thermal Resistance [(m² K/W)]
2.0
2.8
Walls
Ceiling
Floor
Windows
Doors
150
120
120
20
5
2.0
0.1
0.5
(a) Calculate the rate of heat loss from the house when the interior temperature is 22°C
and the exterior is -5°C.
(b) Suggest ways and means to reduce the heat loss and show quantitatively the effect
of doubling the wall insulation and the substitution of double glazed windows
(thermal resistance = 0.2 m² K/W) for the single glazed type in the table above.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd5e75092-d098-43d4-b44f-a500315beefd%2Fb5c11dc8-395b-4a1a-bb90-e8f55ff6aee2%2Frxpdgnb_processed.png&w=3840&q=75)
Transcribed Image Text:With increasing emphasis on energy conservation, the heat loss from buildings has
become a major concern. For a small tract house the typical exterior surface areas and
R-factors (area x thermal resistance) are listed below
Element
Area (m²)
R-Factors = Area > Thermal Resistance [(m² K/W)]
2.0
2.8
Walls
Ceiling
Floor
Windows
Doors
150
120
120
20
5
2.0
0.1
0.5
(a) Calculate the rate of heat loss from the house when the interior temperature is 22°C
and the exterior is -5°C.
(b) Suggest ways and means to reduce the heat loss and show quantitatively the effect
of doubling the wall insulation and the substitution of double glazed windows
(thermal resistance = 0.2 m² K/W) for the single glazed type in the table above.
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