Calculate the RSI-total for the walls using the tabular method demonstrated in class, and the temperature drop through each element for the January 2.5% temperature.
Calculate the RSI-total for the walls using the tabular method demonstrated in class, and the temperature drop through each element for the January 2.5% temperature.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Climate:
Avg. Temperature is 3.2°C
July 2.5% high is 22.8°C, J
Degree Days is 5000
Inside Air Temp. is 20°C
Wall Construction, Inside to Out:
●
·
.
Qigihar House in Heilongjiang Province, China Heat Loss Problems, BSCI 2101
.
1. January
2.5% low is -26.0°C
15mm Gypsum Plaster, Sand Aggregate
X
Concrete Block, rectangular core, Sand and Gravel 2 core, 200mm
15mm Cement Plaster, Sand Aggregate
All 4 walls measure the same, 8m wide by 7m tall. The house is heated with electricity at a cost
of $0.10/kWh
4. Calculate the January heating cost for the building.
1. Calculate the RSI-total for the walls using the tabular method demonstrated in class, and
the temperature drop through each element for the January 2.5% temperature.
2. Calculate the rate of heat flow through the wall again for the January 2.5% temperature.
3. Plot the temperature profile approximately to scale through a vertical cross-section of
the wall.
5. Calculate the annual heating cost for the building.
用国
8m
6. Now add 2" (50.8mm) of extruded polystyrene, smooth skin surface, 35kg/m³ rigid
insulation to the inside surfaces of the walls, and cover it with 9.5mm gypsum board for
fire protection, and calculate the new RSI-total for the walls.
7. Calculate the new rate of heat flow through the wall again for the January 2.5%
temperature.
9. Calculate the new January heating cost for the building.
3. Plot the new temperature profile approximately to scale through a vertical cross-section
of the wall.
10. Calculate the new annual heating cost for the building.
17m
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