4/18/2021 0 Comments Hvac Air Duct Sizing
The method can be summarized to Select suitable velocities for main and branch ducts from the table below Find the sizes of main and branch ducts from the air flow rates and the velocities by using eq.From velocities and duct dimensions - find the frictional pressure loss in the main and branch ducts using the friction chart below Add minor dynamic loss Proper Velocities A proper velocity depends on application and environment.
Hvac Air Duct Sizing Trial Systems HighThe table below indicate commonly used velocities: Type of Duct Comfort Systems Industrial Systems High Speed Systems ms ftm ms ftm ms ftm Main ducts 4 - 7 780 - 1380 8 - 12 1575 - 2360 10 - 18 1670 - 3540 Main branch ducts 3 - 5 590 - 985 5 - 8 985 - 1575 6 - 12 1180 - 2360 Branch ducts 1 - 3 200 - 590 3 - 5 590 - 985 5 - 8 985 - 1575 Be aware that high velocity close to outlets and inlets may generate unacceptable noise.Customize sections, airflows, duct sizes and minor dynamic loss coefficients - add pressure loss paths and evaluate and reconfigure the system to fit your criteria. The Google Docs spreadsheet template can be opened and copied here The spreadsheet can also be downloaded as an excel file. Cookies are only used in the browser to improve user experience. Some of our calculators and applications let you save application data to your local computer. Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy Terms for more information about how you can control adserving and the information collected. Advertise in the ToolBox If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. You can target the Engineering ToolBox by using AdWords Managed Placements. Citation This page can be cited as Engineering ToolBox, (2003).
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