
Run 1.xlsm
Q
sd
– Average gas flow rate in dilution tunnel, dscf/hr
ASTM E2515 equation (3)
Where:
3600
=
Conversion from seconds to hours (ASTM method uses 60 to convert in minutes)
B
ws
=
Water vapor in gas stream, proportion by volume; assume 2%
A
=
Cross sectional area of dilution tunnel, ft
2
T
std
=
Standard absolute temperature, 528
°
R
P
s
=
Absolute average gas static pressure in dilution tunnel, = P
bar
+ P
g
, in Hg
T
s
=
Absolute average gas temperature in the dilution tunnel,
°
R; (
°
R =
°
F + 460)
P
std
=
Standard absolute pressure, 29.92 in Hg
Sample calculation:
-0.04
13.6
83.4 + 460
Q
sd
=
25194.6
dscf/hr
29.92
30.47 +
Q
sd
= 3600 x (1 - 0.02) x
9.19 x 0.7854 x
528
x
std
s
s
std
s
ws
sd
P
P
T
T
A
v
B
Q
−
=
)
1
(
3600
PFS-TECO
Page 7 of 14
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