ASHRAE/IES Standard 90.1 Metal Building U-factors-Part 5: Mathematical Modeling of Wall Assemblies and Validation by Calibrated Hot Box Measurements

A three-dimensional mathematical model developed earlier by Choudhary et al was used to investigate heat transfer in two metal building wall insulation assemblies. The model predictions for the overall heat transfer coefficients were tested with measurements from calibrated hot boxes for these assem...

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Bibliographic Details
Main Authors: Choudhary, Manoj K, Kasprzak, Chris P, Musick, David E, Henry, Mark J, Fast, N Douglass
Format: Conference Proceeding
Language:English
Subjects:
Agreements
Assemblies
Calibration
Chambers
Heat transfer
Heat transfer coefficients
Insulation
Mathematical models
Studies
Walls
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Summary:A three-dimensional mathematical model developed earlier by Choudhary et al was used to investigate heat transfer in two metal building wall insulation assemblies. The model predictions for the overall heat transfer coefficients were tested with measurements from calibrated hot boxes for these assemblies. The measurements were conducted with the insulation side facing the metering chamber and the wall side facing the climate chamber of the hot box. The predicted and measured heat transfer coefficients were in 93.3% agreement for the single insulation layer wall assembly and 95.5% agreement for the two insulation layer assembly. The excellent agreements for the MBI wall assemblies observed in the present study, in conjunction with the 93%-97% agreement reported previously by Choudhary et al for the MBI roof assemblies, provide further confidence in the use of the mathematical model to study heat transfer in and calculate U-factors for the MBI assemblies that contain fiber-glass as the key insulation component.
ISSN:0001-2505