FPI CI2700 Manual page 160

Run 1 Data.xlsm
PR - Proportional Rate Variation
ASTM E2515 equation (16)
     
V V T
=
mi s m
PR 
   

V V T
i m si mi
Where:
θ = Total sampling time, min
θ
= Length of recording interval, min
i
V = Volume of gas sample measured by the dry gas meter during the "ith"
mi
time interval, dcf
V
= Volume of gas sample as measured by dry gas meter, dcf
m
V
= Average gas velocity in the dilution tunnel during the "ith" time interval, ft/sec
si
V
= Average gas velocity in the dilution tunnel, ft/sec
s
= Absolute average dry gas meter temperature during the "ith" time interval,
T
mi
= Absolute average dry gas meter temperature,
T
m
= Absolute average gas temperature in the dilution tunnel during the "ith" time interval,
T
si
= Absolute average gas temperature in the dilution tunnel,
T
s
Sample calculation (for the first 1 minute interval of Train 1):
215
(
PR =
1
96
PR =
PFS-TECO

T
100
 
si


T
s
x 0.145 x 16.65
x 31.851 x 16.23
%
o
R
o
R
x ( 77.0 + 460 ) x ( 76.0 + 460
x ( 105.2 + 460 ) x ( 71.0 + 460
Page 15 of 17
o
R
o
R
)
)
x 100
)