Swegon SILVER C RX - 5.2.1 Temperature-Compensated Airflows; 5.2.2 Flow Measurement Pressure Calculation

GB.SILVERSK.170901
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5.2.1 Calculation of
temperature-compensated airflows
∆
p
c
= ∆p x
273 + t
a
293
Δp
c
= corrected flow measurement pressure in Pa
Δp = measured flow measurement pressure in Pa
t
a
= the air temperature at the fan inlet in °C
q =
+ c
2
- c
2
∆
p
c
c
1
√
√
q = the calculated airflow, [m³/s]
c
1
, c
2
= constants that depend on fan size, see table below.
Size
Min. air
flow, m³/s
SILVER C RX/PX/CX SILVER C SD
c1 c2 c3
Max. air-
flow, m³/s
Max. pres-
sure read-
ing, Pa
Max. air-
flow, m³/s
Max. pres-
sure read-
ing, Pa
04 0,08 0,45 301 0,6 529 1421,9 0,0001 28,4
05 0,08 0,65 619 0.8 933 1421,9 0,0001 28,4
07 0,08 0,75 821 0.8 933 1421,9 0,0001 28,4
08 0,20 1,0 719 1.2 1028 690 0,00043 28,74
11 0,20 1.1 867 1.2 1028 690 0,00043 28,74
12 0,20 1,4 630 1,8 1034 311,75 0,00045 13,21
14 0,20 1,65 871 1,8 1034 311,75 0,00045 13,21
20 0.30 2.1 712 2,8 1245 151 0,00525 21,89
25 0.30 2.5 998 2,8 1245 151 0,00525 21,89
30 0,50 3,2 816 4 1269 77,688 0,00174 6,48
35 0,50 3,9 1207 4 1269 77,688 0,00174 6,48
40-1 0,75 3,9 561 5 901 32,942 0,05509 15,464
40-2 0,75 5.0 901 6 1279 32,942 0,05509 15,464
50 0,60 5.0 998 5.6 1245 37,75 0,02102 10,945
60 1,00 6,5 814 8 1232 19,11 0,00078 1,07
70 1,00 7,5 1083 8 1232 19,11 0,00078 1,07
80 1,50 9,5 790 12 1250 8,378 0,04642 3,61
100 1.5 11 1053 12 1250 8,378 0,04642 3,61
120 2.5 14 779 18 1279 3,848 0,05349 1,78
5.2.2 Calculation of flow
measurement pressure
∆p = (c
1
x q + c
3
) x q
Δp = calculated flow measurement pressure in Pa
q = airflow at fan inlet in m³/s
c
1
, c
3
= constants that depend on fan size, see table below.