General Outline ESIE10-01
1–72 Part 1 – System Outline
3
11
4
5
1.24 Capacity Correction Factor EWAD~C-
Evaporator fouling
factors
Altitude correction
factors
Minimum glycol
percentage for low
water temperature
Note: Minimum glycol percentage to be used with evaporator leaving water temperature below 4°C to
prevent freezing of water circuit.
Minimum glycol
percentage for low
air temperature
Note (1): Minimum glycol percentage to prevent freezing of water circuit at indicated air ambient
temperature.
Note (2): Air ambient temperature do exceed the operating limits of the unit. as protection of water
circuit may be needed in winter season at non-working conditions.
Correction factors
for low evaporator
leaving water
temperature
Note: Correction factors have to be applied at working conditions: evaporator leaving water
temperature 7°C.
Fouling factors
m
2
°C / kW
Cooling capacity
correction factor
Power input correction
factor
EER correction factor
0.0176 1.000 1.000 1.000
0.0440 0.978 0.986 0.992
0.0880 0.957 0.974 0.983
0.1320 0.938 0.962 0.975
Elevation above sea level (m) 0 300 600 900 1200 1500 1800
Barometric pressure (mbar) 1013 977 942 908 875 843 812
Cooling capacity correction factor 1.000 0.993 0.986 0.979 0.973 0.967 0.960
Power input correction factor 1.000 1.005 1.009 1.015 1.021 1.026 1.031
Evaporator Leaving Water Temperature (°C) 2 0 -2 -4 -6 -8
Ethylene glycol (%) 10 20 20 20 30 30
Propylene glycol (%) 10 20 20 30 30 30
Air Ambient Temperature (°C) (2) -3 -8 -15 -23 -35
Ethylene glycol (%) (1) 10% 20% 30% 40% 50%
Air Ambient Temperature (°C) (2) -3 -7 -12 -20 -32
Propylene glycol (%) (1) 10% 20% 30% 40% 50%
Evaporator Leaving Water Temperature (°C) 2 0 -2 -4 -6 -8
Cooling Capacity 0.842 0.785 0.725 0.670 0.613 0.562
Compressor Power Input 0.950 0.940 0.920 0.890 0.870 0.840
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