Airwell CLH 242 [6/28] Correction factors
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Airwell CLH 242 [6/28] Correction factors

Airwell CLH 202 [6/28] Correction factors
Page 6
Correction Factors
Fouling factors
EVAPORATOR CONDENSER
Fouling factor
(m
2
.°C/kW)
Cooling capacity
factor
Power input
factor
Fouling factor
(m
2
.°C/kW)
Cooling capacity
factor
Power input
factor
0.044 1.000 1.000 0.044 1.000 1.000
0.088 0.987 0.995 0.088 0.987 1.023
0.176 0.964 0.985 0.176 0.955 1.068
0.352 0.915 0.962 0.352 0.910 1.135
Altitude (m) Cooling capacity factor Power input factor
0 1.000 1.000
600 0.987 1.010
1200 0.973 1.020
1800 0.958 1.029
2400 0.943 1.038
Ethylene glycol percent by weight % 10 20 30 35 40
Freezing point
°C -4 -10 -17 -21 -25
Cooling capacity correction factors (1) 0.995 0.985 0.970 0.963 0.955
Power input cor
rection factors (1) 0.998 0.995 0.985 0.983 0.980
Flow rate correction factors 1.015 1.050 1.085 1.123 1.160
Pressure drop correction factors
(2) 1.070 1.160 1.235 1.283 1.330
Leaving water temperature °C 7 4 2 0 -2 -4 -6 -8
Minimum ethylene glycol percent % 0 10 10 20 20 30 30 35
Cooling capacity correction factors 1.000 0.887 0.816 0.748 0.685 0.624 0.568 0.513
Power input correction factors
1.000 0.940 0.900 0.865 0.826 0.788 0.753 0.718
Ethylene glycol percent by weight Glycol solution leaving temperature (°C) Pressure drop correction factors
10%
5 1.071
4 1.076
3 1.081
2 1.085
20%
1 1.193
0 1.200
-1 1.208
-2 1.215
30%
-3 1.299
-4 1.306
-5 1.320
-6 1.333
(1) Factors applicable only for glycol solution leaving temperature ≥7 °C. For temperatures < 7 °C, refer to table "Low temperature operation
correction factors".
(2) Factors applicable only for glycol solution leaving temperature > 5 °C. For temperatures < 5 °C, refer to table "Pressure drop correction
factors for low temperature operation".
Altitude factors
Ethylene glycol solution correction factors
Low temperature operation correction factors
Pressure drop correction factors for low temperature operation

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