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6 Cards in this Set
- Front
- Back
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Heat lost is represented by Q QTotal is the result of heat lost from where? |
QTotal = QFabric + QAir |
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How is Thermal Resistance of a material calculated? |
R = d/λ Where λ = Thermal Conductivity |
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What is the equation for a material's U-Value? |
1/RT Where RT = Total Thermal Resistance of all materials |
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What is the equation for QFabric? |
QFabric = ∑UiAiΔT U = U-value of element A = Area of element ΔT = TOut - TIn |
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What is the equation of QAir? |
QAir = (1/3)NVΔT N = number of air changes per hour V = Volume of building ΔT = TOut - TIn |
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What is the degree day of a building which is at 13.5 degrees, and needs to be heated to a baseline of 15.5 degrees for 30 days? |
2 degrees per day for 30 days SO 2 x 30 = 60 degree days |
