Residential annual energy use. For a house with: Air exchange rate of 0.5 h−1 Cp = 1000 J/kg.K Density of air = 1.2 kg/m3 Roof area = 144 m2; opaque wall area = 96 m2; window area = 24 m2; volume = 360 m3 Conductivity of Uwall = 0.60 W/(m2-K); Uwin = 3.0 W/(m2-K); Uroof = 0.40 W/(m2-K) Heating system efficiency of 0.85 Heating degree days (HDD) of 3500 K-days Calculate the Ktot for this house. Calculate the annual energy used to heat this house (in GJ).

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Residential annual energy use. For a house with:

  • Air exchange rate of 0.5 h−1
  • Cp = 1000 J/kg.K
  • Density of air = 1.2 kg/m3
  • Roof area = 144 m2; opaque wall area = 96 m2; window area = 24 m2; volume = 360 m3
  • Conductivity of Uwall = 0.60 W/(m2-K); Uwin = 3.0 W/(m2-K); Uroof = 0.40 W/(m2-K)
  • Heating system efficiency of 0.85
  • Heating degree days (HDD) of 3500 K-days
  1. Calculate the Ktot for this house.
  2. Calculate the annual energy used to heat this house (in GJ).
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