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OMNI-Test Laboratories, Inc.
Q
– Average gas flow rate in dilution tunnel, dscf/hr
sd
ASTM E2515 equation (3)
Q
3600
sd
Where:
3600
=
B
=
ws
A
=
T
=
std
P
=
s
T
=
s
P
=
std
Sample calculation:
Q
= 3600 x (1 - 0.02) x
sd
Q
= ##### dscf/hr
sd
Control No. P-SFDK-0002, Effective date: 5/06/2016
1 (
B
)
v
A
ws
s
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 diltuion tunnel, = P
Absolute average gas temperature in the dilution tunnel, °R; (°R = °F + 460)
Standard absolute pressure, 29.92 in Hg
14.73 x
0.196
T
P
std
s
T
P
s
std
2
528
x
81.7 + 460
63 of 112
File - 135PS040E PP70 Run 1, Tab - Example Calculations
+ P
, in Hg
bar
g
-0.20
30.5 +
13.6
x
29.92
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