Hearth and Home Technologies Expedition-I, Manual

Page: 78 / 167

Run 1.xlsm
PR - Proportional Rate Variation
ASTM E2515 equation (16)
Where:
θ
= Total sampling time, min
θ
i
= Length of recording interval, min
V
mi
=
Volume of gas sample measured by the dry gas meter during the “ith”
time interval, dcf
V
m
= Volume of gas sample as measured by dry gas meter, dcf
V
si
= Average gas velocity in the dilution tunnel during the "ith" time interval, ft/sec
V
s
= Average gas velocity in the dilution tunnel, ft/sec
T
mi
=
Absolute average dry gas meter temperature during the "ith" time interval,
o
R
T
m
=
Absolute average dry gas meter temperature,
o
R
T
si
=
Absolute average gas temperature in the dilution tunnel during the "ith" time interval,
o
R
T
s
=
Absolute average gas temperature in the dilution tunnel,
o
R
Sample calculation (for the first 1 minute interval of Train 1):
94 x 0.223 x 8.66 x ( 109.9 + 460 ) x ( 81.8 + 460 )
1 x 21.64 x 8.24 x ( 102.4 + 460 ) x ( 73.8 + 460 )
PR = 105 %
PR =
)
x 100
(
100







   
   
=
s mi si m i
si m s mi
T T V V
T T V V
PR


PFS-TECO Page 13 of 15