Beko DRYPOINT RA CT 100-NA-EB, Instructions For Installation And Operation Manual

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Installation
DRYPOINT® RA CT 20-500 NA 23
9.3 Correction factors
Correction factor for operating pressure modifications:
Inlet air pressure
psig 60 80 100 120 140 160 180 203
barg 4 5.5 7 8 10 11 12 14
Factor (F1) 0.79 0.91 1.00 1.07 1.13 1.18 1.23 1.27
Correction factor for ambient temperature modifications:
Ambient temperature
ºF 80 90 95 100 105 110 115 122
ºC 27 32 35 38 40 43 45 50
Factor (F2) 1.11 1.09 1.06 1.00 0.94 0.87 0.78 0.69
Correction factor for inlet air temperature modifications:
Air temperature
ºF 90 100 110 122 130 140 150 158
ºC 32 38 43 50 55 60 65 70
Factor (F3) 1.16 1.00 0.82 0.68 0.61 0.52 0.45 0.40
Correction factor for DewPoint modifications:
DewPoint
ºF 38 41 45 50
ºC 3 5 7 10
Factor (F4) 1.00 1.08 1.20 1.36
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 CT 75 NA has a planned nominal capacity of 75 scfm (127 m³/h). The highest
achievable air mass under the following operating conditions is:

Air inlet pressure = 120 psig (8 barg)

Ambient temperature = 115°F (45°C)

Air inlet temperature = 122°F (50°C)

Pressure dew point = 50°F (10°C)

Factor (F1) = 1.07

Factor (F2) = 0.78

Factor (F3) = 0.68

Factor (F4) = 1.36
Every function parameter corresponds to a numerical factor which, multiplied by the planned nominal capacity,
determines the following:
Actual air throughput = 75 x 1.07 x 0.78 x 0.68 x 1.36 = 58 scfm (99 m³/h)
58 scfm (99 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 =
Requ. air throughput
Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4)
Example:
The following operating parameters are known:

Required air mass = 100 scfm (170 m
3
/h)

Air inlet pressure = 120 psig (8 barg)

Ambient temperature = 115°F (45°C)

Air inlet temperature = 122°F (50°C)

Pressure dew point = 50°F (10°C)

Factor (F1) = 1.07

Factor (F2) = 0.78

Factor (F3) = 0.68

Factor (F4) = 1.36
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 =
100
= 130 scfm (221 m³/h)
1.07 x 0.78 x 0.68 x 1.36
The suitable model for these requirements is DRYPOINT RA CT 150 NA (with a spec. nominal capacity of
150 scfm [255 m³/h] ).