FPI I2450M Manual page 204

Run 1
Q – Average gas flow rate in dilution tunnel, dscf/hr
sd
ASTM E2515 equation (3)
Where:
3600 =
B =
ws
A =
T
=
std
P
=
s
T
=
s(avg)
P
=
std
Sample calculation:
Q =
3600 x (1 - 0.02) x
sd
Q =
sd
PFS-TECO
Conversion from seconds to hours (ASTM method uses 60 to convert in minutes)
Water vapor in gas stream, proportion by volume; assume 2%
Cross sectional area of dilution tunnel, ft
Standard absolute temperature, 528 °R
Absolute average gas static pressure in dilution tunnel, = P
Absolute average gas temperature in the dilution tunnel, °R; (°R = °F + 460)
Standard absolute pressure, 29.92 in Hg
17.66 x 0.1963
10813.7
dscf/hr
2
528
x
135.6 + 460
Page 10 of 17
+ P , in Hg
bar g
-0.24
29.86 +
13.6
x
29.92