Annex 20 (11 pages)
E2515
Equation (9)
F_p
-
Adjustment factor for center of tunnel pitot tube placement
K_p
-
Pitot Tube Constant 34,97 m/sec
C_p
-
Pitot tube coefficient, dimentionless (assigned a value of 0.99)
ΔP_avg
mmVC
Average velocity pressure in dilution tunnel, mm water
T_s
K
Absolute average gas temperature in the dilution tunnel
P_s
mm Hg
Absolute average gas static pressure in dilution tunnel
M_s
g/g mole
The dilution tunnel dry gas molecular weight (may be assumed to be 29 g/g mole)
V_s
m/s
Average gas velocity in the dilution tunnel
Equation (1)
F_p
-
Adjustment factor for center of tunnel pitot tube placement
V_strav
m/s
Average gas velocity calculated after the multipoint Pitot traverse
V_scent
m/s
Average gas velocity at the center of the dilution tunnel calculated after the Pitot tube traverse
Equation (3)
B_ws
-
Water vapor in the gas steam, proportion by volume (assumed to be 0.02 (2.0%))
V_s
m/s
Average gas velocity in the dilution tunnel
A
m2
Cross-sectional area of tunnel
T_std
K
Standard absolute temperature, 293K
P_s
mm Hg
Absolute average gas static pressure in dilution tunnel
T_s
K
Absolute average gas temperature in the dilution tunnel
P_std
mmHg
Standard absolute pressure, 760 mm Hg
Q_std
dscm/min Average gas flow rate in dilution tunnel
Equation (7)
V_m
dcm
Volume of gas sample as measured by dry gas meter
L_p
m3/min
Leakage rate observed during the post-test leakcheck
L_a
m3/min
Maximum acceptable leakage rate for either a oretest og post-test leak-check, equal to 0.0003 m3/min
θ
Min
Total sampling time
V_mc
-
V_m - (L_p - L_a) *
θ
K_1
K/mm Hg
0.3855 K/mm Hg
Y
-
Dry gas meter calibration factor
P_Bar
mm Hg
Barometric pressure at the sampling site.
ΔH
mmVC
Average pressure at the outlet of the dry gas meter or the avarage differential pressure across the orifice meter
T_m
K
Absolute average dry gas meter temperature
V_mc(std)
dscm
Volume of air sample measured by the dry gas meter, corrected to standard conditions
Equation (12) m_p
mg
mass of particulate from probe
m_f
mg
mass of particulate from filters
m_g
mg
mass of particulate from gaskets
m_n
mg
Total amount of particulate matter collected
Equation (13) K_2
g/mg
0.001
m_n
mg
Total amount of particulate matter collected
V_m(std)
dscm
Volume of gas sample measured by the dry gas meter, corrected to standard conditions
c_s
g/dscm
Consentration of particulate matter in tunnel gas, dry basis, corrected to standard conditions
Equation (15) c_s
g/dscm
Consentration of particulate matter in tunnel gas, dry basis, corrected to standard conditions
c_r
g/dscm
Consentration of particulate matter room air, dry basis, corrected to standard conditions
Q_std
dscm/min Average gas flow rate in dilution tunnel
θ
Min
Total sampling time
E_T
g
Total particulate emissions
Equation (8)
K_1
K/mm Hg
0.3855 K/mm Hg
V_mr
dcm
Volume of room air sampled as measured by dry gas meter
Y
-
Dry gas meter calibration factor
P_bar
mm Hg
Barometric pressure at the sampling site.
ΔH
mmVC
Average pressure at the outlet of the dry gas meter or the avarage differential pressure across the orifice meter
T_m
K
Absolute average dry gas meter temperature
V_mr(std)
dscm
Volume of room air sample measured by the dry gas meter, corrected to standard conditions
Equation (14) K_2
g/mg
0.001
m_r
mg
mass of particulate from the filter, filter gasket, and probe assembly from the room air blank filter holder assembly
V_mr(std)
dscm
Volume of room air sample measured by the dry gas meter, corrected to standard conditions
Equation (16)
θ
Min
Total sampling time
V_mi
dcm
Volume of gas sample as measured by dry gas neter during each 10-min interval, i, of the test run
V_s
m/s
Average gas velocity in the dilution tunnel
T_m
K
Absolute average dry gas meter temperature
T_si
K
Absolute average gas temperature in the dilution tunnel during each 10-min interval, i, of the test run
V_m
dcm
Volume of gas sample as measured by dry gas meter
V_si
dcm
Volume of gas sampled as measured by dry gas meter during each 10-min interval, i, of the test run
T_s
K
Absolute average gas temperature in the dilution tunnel
T_mi
K
Absolute avarage dry gas meter temperature during each 10-min interval, i, of the test run
PR
-
Proportional Rate Variation - Calculated PR for each 10-min interval, i, of the test run
11
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