Correction Factors - Beko Bekoblizz LC 12-355 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 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 = 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:
181 m³/h is the maximum flow rate of the chiller 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 = 100 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 150 (with a spec. nominal capacity of 150 m³/h).
16
bar(g) 4
0.77
ºC 25
1.00
ºC 25
1.39
ºC 4
0.88
Actual air throughput = 240 x 1.05 x 0.90 x 0.80 x 1.00 = 181 m³/h
Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4)
3
/h
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
Requ. air throughput
 Factor (F1) = 1.05
 Factor (F2) = 0.90
 Factor (F3) = 0.80
 Factor (F4) = 1.00
100
= 132 m³/h
8 10 12
1.05 1.14 1.21
40 45
0.82 0.72
40 45
0.80 0.63 0.51
10 15
1.15 1.42
BEKOBLIZZ® LC 12-355
14 15
1.27 1.30
50
0.60
50 55
0.46
20
1.82