Correction Factors - Beko BEKOBLIZZ LC 480 Instructions For Installation And Operation Manual

Installation
8.3

Correction factors

Correction factor for operating pressure changes:
Inlet air pressure
Factor (F1)
Correction factor for ambient temperature changes (Air-Cooled):
Ambient temperature
Factor (F2)
Correction factor for inlet air temperature changes:
Air temperature
Factor (F3)
Correction factor for DewPoint changes:
DewPoint
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 BEKOBLIZZ LC 600 has a planned nom inal capacity of 600 m³/h. The highest achievable air mass
under the following operating conditions is:
− Air inlet pressure = 8 bar(g)
Ambient temperature = 35°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:
454 m³/h is the maximum air mass of the
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 = 400 m
−
Air inlet pressure = 8 bar(g)
−
− Ambient temperature = 35°C
Air inlet temperature = 40°C
−
− Pressure dew point = 5°C
To find out the correct chiller 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 BEKOBLIZZ LC 600 (with a specif. nominal capacity of 600 m³/h).
16
bar(g) 4
0.77
ºC 25
1.00
ºC 25
1.39
ºC 4
0.88
Actual air throughput = 600 x 1.05 x 0.90 x 0.80 x 1.00 = 454 m³/h
chiller
factor (F1) x factor (F2) x factor (F3) x factor (F4)
/h
3
1.05 x 0.90 x 0.80 x 1.00
5 6 7
0.86 0.93 1.00
30 35
0.96 0.90
30 35
1.20 1.00
5 7
1.00 1.04
 Factor (F1) = 1.05
 Factor (F2) = 0.90
 Factor (F3) = 0.80
 Factor (F4) = 1.00
under the aforementioned operating conditions.
Required air throughput
 Factor (F1) = 1.05
 Factor (F2) = 0.90
 Factor (F3) = 0.80
 Factor (F4) = 1.00
400
= 529 m³/h
8 10 12
1.05 1.14 1.21
40 45
0.82 0.72
40 45 50
0.80 0.63 0.51
10 15
1.15 1.42
BEKOBLIZZ® LC 480-720
14 15
1.27 1.30
50
0.60
55
0.46
20
1.82