A duct size calculator, commonly known as a ductulator, depends on factors like the size of the space you’re heating or cooling, air flow velocity, friction loss, and available static pressure of the HVAC system.
The May 2009 article, "Equal Friction Solution for Duct Sizing," by Fred W. Dougherty, RE., has at least two errors.rnFirst, the article says that "duct friction and fitting dynamic losses...will make up the external static pressure on the air-handling unit." The ASHRAE Handbook says,...
The results include both the exact and rounded height and width (or diameter) dimensions and the calculated velocity and friction loss You can specify additional parameters such as the duct shape (rectangular, round, or oval), the air temperature and the air pressure. You can also choose to ...
The resulting friction loss and velocity values are also updated. Depending upon whether you are sizing rectangular, round, or oval duct, the types of results displayed will vary. The following is an explanation of all of the result values with an indication of the duct shape represented: ...
Air Ducts - Friction Loss Diagram A major friction loss diagram for air ducts - Imperial units ranging 10 - 100 000 cfm. Air Ducts - Major Friction Head Loss, Online Calculator Head loss or major loss in air ducts - equations and online calculator for rectangular and circular ducts - ...
2.9(满分 5 分) 8 个评分 Manical1,2009/10/17 Good app, needs iPod touch support I bought this app for my iPhone. Very handy and good for duct sizing in the field. Next iteration might want to tabulate duct runs for friction loss. ...
The Duct Calculator Elite™ solver uses friction loss equations contained in 2009 ASHRAE Handbook - Fundamentals. The next time you go to a meeting or out to the field, leave your Ductulator at home, you'll have everything you need right on your iPhone/iPad/iPod Touch! If you are not...
Friction loss coefficients in pipes, tubes and ducts. Duct Sizing - the Equal Friction Method The equal friction method for sizing air ducts is easy and straightforward to use. Ducts - Cross-Sectional Area vs. Diameter Circular ducts sross-sectional areas. Ducts - Sheet Metal Gauges Thick...
duct-design-05ed Subject: HVAC Technology Hong Kong Institute of Vocational Education (Morrison Hill), Department of Real Estate and Facilities Management AIR DUCT SYSTEM AND SIZING 1 Fundamentals of Air Flow in Duct • Bernoulli Equation : There is no frictional loss for a streamline flow of...
file=ASHRAE-D-AJ10Jan05-20091230.pdf 1hasalimitednumberoftablesoflosscoefficientsforusewiththeexampleproblems.InJune1994,ASHRAEpublishedacomputerizedDuctFittingDatabasethat... AReviewof“EqualFrictionSolutionforDuctSizing”By... http://bookstore.ashrae.biz/journal/download.php?file=ashrae-d-aj09may04-...