Miscellaneous equations

Reference, Installation, and Operations Manual

June 2013

3-9000-743 Rev S

 

 

Volumetric Flow Rate

Equation B-3 Volumetric Flow Rate - U.S. Customary Units

 

 

 

 

 

πDin2

 

 

1ft

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Qft3

hr = Vft s

3600 s

hr

-----------

 

----------

 

 

 

 

4

 

 

 

12in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

where

Qft3 hr

Vft s

2

 

3600 ⋅ π s ft2

 

= Vft s Din

 

--------------------4 ⋅ 122 hr-------------in2-

 

 

=Vft s D2in ⋅ 19.63495((s ft2) ⁄ (hr in2))

=volumetric flow rate (ft3/h) (QMeter)

=gas flow velocity (ft/s) (AvgFlow)

π

=

geometric constant, pi (dimensionless) (3.14159265...)

Din

=

pipe inside diameter (in) (PipeDiam)

Equation B-4 Volumetric Flow Rate - Metric Units

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

πDm2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Qm3 hr

= Vm

s

3600 s

hr

 

----------

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

= V

 

 

 

 

 

2

 

 

3600 ⋅ π

 

 

 

 

 

 

 

 

 

D

 

(s hr)

 

 

 

m

s

m

--------------------

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

= Vm

s

Dm2

⋅ 2827.433(s hr)

where

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Qm3 hr

=

volumetric flow rate (m3/h) (QMeter)

Vm s

=

gas flow velocity (m/s) (AvgFlow)

π

=

geometric constant, pi (dimensionless) (3.14159265...)

Dm

=

pipe inside diameter (m) (PipeDiam)

296

Miscellaneous conversion factors