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Lecture_5.2_Heat_Loss

# Lecture_5.2_Heat_Loss - AE202 Lecture 5.2 Heat Loss Heat...

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AE202 Name______________________ Lecture 5.2 Heat Loss Date_______________________ Heat flow rate (q) [BTU/hr] q = [ BTU/hr] A = Actual area [square feet] U T = Actual temperature difference [°F] U T = (T i - T o ) [°F] T i = T o = Temperature T i Inside temperature Winter design = °F Summer design= °F T o Outside design temperature City Pittsburgh AP (Airport) CO (County Office) Latitude Longitude Elevation Winter Design Dry Bulb (State College) @99% ________°F @97 ½% ________°F Basement T D = T i – T soil T soil = T avg – A A = Amplitude T ave = Average air winter temp

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Basement walls Amount of heat flow is proportional to: Length of path U-Value q = u x A x ____ [BTU/hr] TD = Ti – Tsoil Tsoil = T avg – A