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Installation
8.3
Correction factors
Correction factor for operating pressure modifications:
Air inlet pressure
Factor (F1)
Correction factor for ambient temperature modifications (air cooling):
Ambient temperature
Factor (F2)
Correction factor for air inlet temperature modifications:
Air temperature
Factor (F3)
Correction factor for dew point modifications:
Pressure dew point
Factor (F4)
Calculation of the actual air throughput:
Actual air throughput = air throughput acc. to planning x factor (F1) x factor (F2) x factor (F3) x factor (F4)
Example:
The DRYPOINT RA 240 has a planned nominal capacity of 240 m³/h. The highest achievable air mass
under the following operating conditions is:
Air inlet pressure = 8 bar(g)
Ambient temperature = 30°C
Air inlet temperature = 40°C
Pressure dew point = 5°C
Every function parameter corresponds to a numerical factor which, multiplied by the planned nominal capacity,
determines the following:
222 m³/h is the maximum flow rate of the dryer under the aforementioned operating conditions.
Selection of the best suitable model in accordance with the operating conditions:
Air throughput acc. to planning =
Example:
The following operating parameters are known:
Required air mass = 180 m
Air inlet pressure = 8 bar(g)
Ambient temperature = 30°C
Air inlet temperature = 40°C
Pressure dew point = 5°C
To find out the correct dryer version, the required air mass must be divided by the correction factors of the
parameters indicated above:
Air throughput acc. to planning =
The suitable model for these requirements is DRYPOINT RA 240 (with a spec. nominal capacity of 240 m³/h).
16
bar(g)
4
0.77
ºC
25
1.00
ºC
25
1.27
ºC
3
1.00
Actual air throughput = 240 x 1.05 x 0.96 x 0.84 x 1.09 = 222 m³/h
Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4)
3
/h
1.05 x 0.96 x 0.84 x 1.09
5
6
7
0.86
0.93
1.00
30
35
0.96
0.91
30
35
40
1.21
1.00
0.84
5
1.09
Factor (F1) = 1.05
Factor (F2) = 0.96
Factor (F3) = 0.84
Factor (F4) = 1.09
Requ. air throughput
Factor (F1) = 1.05
Factor (F2) = 0.96
Factor (F3) = 0.84
Factor (F4) = 1.09
180
= 195 m³/h
8
10
12
1.05
1.14
1.21
40
45
0.85
0.76
45
50
55
0.70
0.57
0.48
7
1.19
DRYPOINT® RA 20-960
14
1.27
50
0.64
60
0.42
10
1.37
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