Flat oval duct leakage class measurement.(Report): An article from: ASHRAE Transactions
Book Details
Author(s)D.C. Gibbs, S. Idem
ISBN / ASINB004SF5U94
ISBN-13978B004SF5U96
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from ASHRAE Transactions, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on July 1, 2010. The length of the article is 3630 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: This paper presents results of an experimental program to determine the leakage class for three cross section flat oval ducts for positive and negative internal pressures. Sealed and unsealed duct leakage tests were performed. The leakage data were found to be a power law function of static pressure difference between the interior and the exterior of the duct. The power law exponent ranged from 0.675 to 1.065 for sealed conditions, and 0.437 to 0.729 for unsealed conditions. Generally the exponent found for an individual duct tested in the negative pressure mode was less than that for the corresponding positive pressure mode. Leakage class values ranged from 0.034 to 1.048 mL/s per [m.sup.2] (0.23 to 2.2 cfm per 100 [ft.sup.2]) for sealed duct tests, and between 297.4 to 1342.2 mL/s per [m.sup.2] (197.2 to 366.5 cfm per 100 [ft.sup.2]) for unsealed tests where sheet metal screws were not used to assemble the duct sections. The flat oval sealed leakage results were lower than those for spiral and longitudinal seam circular ducts reported in the ASHRAE Handbook.
Citation Details
Title: Flat oval duct leakage class measurement.(Report)
Author: D.C. Gibbs
Publication:ASHRAE Transactions (Magazine/Journal)
Date: July 1, 2010
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 116 Issue: 2 Page: 387(7)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: This paper presents results of an experimental program to determine the leakage class for three cross section flat oval ducts for positive and negative internal pressures. Sealed and unsealed duct leakage tests were performed. The leakage data were found to be a power law function of static pressure difference between the interior and the exterior of the duct. The power law exponent ranged from 0.675 to 1.065 for sealed conditions, and 0.437 to 0.729 for unsealed conditions. Generally the exponent found for an individual duct tested in the negative pressure mode was less than that for the corresponding positive pressure mode. Leakage class values ranged from 0.034 to 1.048 mL/s per [m.sup.2] (0.23 to 2.2 cfm per 100 [ft.sup.2]) for sealed duct tests, and between 297.4 to 1342.2 mL/s per [m.sup.2] (197.2 to 366.5 cfm per 100 [ft.sup.2]) for unsealed tests where sheet metal screws were not used to assemble the duct sections. The flat oval sealed leakage results were lower than those for spiral and longitudinal seam circular ducts reported in the ASHRAE Handbook.
Citation Details
Title: Flat oval duct leakage class measurement.(Report)
Author: D.C. Gibbs
Publication:ASHRAE Transactions (Magazine/Journal)
Date: July 1, 2010
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 116 Issue: 2 Page: 387(7)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
