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ASTM Selected Technical Papers
Insulation Materials: Testing and Applications, 2nd Volume
By
RS Graves
RS Graves
1
Oak Ridge National Laboratory
?
Oak Ridge, Tennessee 37831 Symposium Co-Chairman and Editor
Search for other works by this author on:
DC Wysocki
DC Wysocki
2
Mobay Corporation
?
Pittsburgh, Pennsylvania 15205 Symposium Co-Chairman and Editor
Search for other works by this author on:
ISBN-10:
0-8031-1420-6
ISBN:
978-0-8031-1420-3
No. of Pages:
663
Publisher:
ASTM International
Publication date:
1991

An improved computer simulation model for attics has been developed. The model accounts for detailed radiation, buoyancy and wind driven air flows and thermal stratification within the attic airspace. Through comparison with measured data, the paper examines the relative importance of the various modeling parameters and assumptions upon simulation accuracy. Stratification of the attic air was found to be a critical modeling characteristic which is typically ignored in building energy simulations. Both model and measurement results show that air stratification increases significantly when low-emittance surfaces are included.

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