Spirax Sarco RIM20, Инструкция по установке и обслуживанию, Страница: 125 / 132

IM-P198-05 MI Issue 2 125
V
f
= f
K
C
Q
v
= V
f
A
Q
M
= V
f
A 
7.3 Appendix C flowmeter calculations
Flowing velocity
Volume flowrate
Q
v
= V
f
A
Mass flowrate
Q
M
= V
f
A r
Where:
A = Cross sectional area of the pipe (ft
2
)
f = Turbine meter frequency (pulses / sec)
K
c
= Meter factor corrected for Reynolds Number (pulses / ft)
Q
v
= Volume flowrate (ft
3
/ sec)
Q
M
= Mass flowrate (lbm / sec)
V
f
= Flowing velocity (ft / sec)
r
= Density (lbm / ft
3
)