Flexible aluminium ducts air tightness testing
The scope of the research presented in this paper are aluminum flexible ducts which have a wide application in heating, ventilation, air conditioning and process engineering. Aluminum flexible ducts consist of several alternating layers of aluminum and polyester and steel wire bent into a spiral, wh...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
National Society of Processing and Energy in Agriculture, Novi Sad
2014-01-01
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| Series: | Journal on Processing and Energy in Agriculture |
| Subjects: | |
| Online Access: | https://scindeks-clanci.ceon.rs/data/pdf/1821-4487/2014/1821-44871402065B.pdf |
| Summary: | The scope of the research presented in this paper are aluminum flexible ducts which have a wide application in heating, ventilation, air conditioning and process engineering. Aluminum flexible ducts consist of several alternating layers of aluminum and polyester and steel wire bent into a spiral, while the merger of layers is done using glue. The loss of energy in the air stream through the aluminum flexible duct is due to friction of air stream and air leakage through the walls of the duct. In order to reduce energy consumption after the installation of the ducts it is needed to check mechanical properties of aluminum flexible ducts right after manufacture. Checking of the mechanical characteristics of aluminum flexible ducts is done according to recommendations of standard (EN 13180, 2002). Within the standard for testing mechanical properties of aluminum flexible ducts it is predicted to check tightness of ducts and to grade duct quality from the point of tightness. The aim of this paper is to present the air tightness testing of ducts and grade duct quality from the point of tightness with proposed methodology. Testing of the samples is shown for the following aluminum flexible duct diameters: 82 mm, 102 mm, 203 mm, 315 mm and 356 mm. The proposed methodology does not take into account that the heated air in the duct could potentially affect the tightness of bonded layers of the duct wall. For this reason in the future is recommended to test air tightness of ducts with heated air at different temperatures, in order to see the effect of the air temperature on the tightness. |
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| ISSN: | 1821-4487 2956-0195 |