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### 5.1 Shell-and-Tube Heat Exchangers

From Figure 5.21, the equivalent diameter for the triangular pitch layout is 2 4 8 3 4 2 2 o t o e d P d D = (5.130b) The cross flow area of the shell A c is defined as T s t c P DCB A = (5.131) P t di do Flow Pt (a) (b) do di C Figure 5.21 (a) Square-pitch layout, (b) triangular-pitch layout. The diameter ratio d r is defined by i o r d d d = (5.132) AAPM Report 220:Use of Water Equivalent Diameter for Water Equivalent Diameter (Dw) Previous work has eed the x-ray attenuation of a patient in terms of a water cylinder having the same x-ray absorption [5-9]. The area and diameter of such a cylinder of water are referred to as the water equivalent area (A w) and water equivalent diameter (D

### Diameter Calculator:Compute Dimensions of a Circle

The next equations show how you can instead find the diameter from them. The equation for diameter of a circle from circumference is:d = c / . d=c/\pi d = c/. If written instead in terms of the radius, the diameter is very simple; it's just twice as long:d = 2 r. d = 2r d = 2r. Dimensions of a circle:O - origin, R - radius, D - diameter Equivalent Diameter - Water treatment & distribution - Eng Dec 18, 2007 · Equivalent Diameter cr1973 (Civil/Environmental) (OP) 14 Dec 07 11:39. I am looking for a table or chart that shows equivalent diameter between 2 or 3 smaller diameter pipes and one larger diameter (for water main). For example, a 12" diameter main has the same capacity as Equivalent diameter Article about equivalent diameter by In addition, the relationship between the heating time and oil shale particle equivalent diameter was established. A new mathematical model of the heat transfer characteristics of oil shale particles during retorting. (5) Equivalent diameter:the diameter of spherical particle with the same volume of nonspherical particle.

### Single pipe equivalent for parallel pipes - Pipelines

Jul 14, 2008 · Dp = Diameter of equivalent pipe D1 = Diameter of pipe 1 D2 = Diameter of pipe 2 Lp = Length of equivalent pipe L1 = Length of pipe 1 L2 = Length of pipe 2 I understand that you can specify the length of your pipe equivalent, as the diameter should change accordingly, but it doesn't work. Lets take two pipes for example:Equivalent diameter - ThermExcelIn the case of use of oblong ducts, the equivalent diameter is obtained by the eion of the ASHRAE:With:a = Width of the duct (in particular the large diameter for an oblong duct) b = Height of the duct (in particular the small diameter for an oblong duct) Last update:

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