Daikin EWAD650BJYNN/Q [41/346] Correction factors
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Daikin EWAD650BJYNN/Q [41/346] Correction factors

Daikin EWADC16BJYNN [41/346] Correction factors
ESIE07-04 General Outline
Part 1 – System Outline 1–29
3
1
4
5
1.18 Correction Factors
Evaporator fouling
factors
The table below gives the evaporator fouling factors.
Altitude correction
factors
The table below gives the altitude correction factors.
Ethylene glycol and
low ambient
temperature
correction factors
The table below gives the ethylene glycol and low ambient temperature correction factors.
Low temperature
operation
performance
factors
The table below gives the low temperature operation performance factors.
Low temperature operation performance factors must be applied to the nominal performance data to have the
adjusted value (12/7°C, design ambient temperature).
Fouling factors
m2°C / kW
Cooling capacity
correction factor
Power input corretion
factor
COP
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
Elvation above sea level (m) 0 300 600 900 1200 1500 1800
Barometric pressure (mbar) 1013 977 942 908 875 843 812
Cooling cap.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
Air ambient temperature °C -3 -8 -15 -23 -35
% of ethylene glycol by weight 10 20 30 40 50
Cooling capacity correction factor 0.991 0.982 0.972 0.961 0.946
Power input correction factor 0.996 0.992 0.986 0.976 0.966
Flow rate correction factor 1.013 1.040 1.074 1.121 1.178
Water pressure drops correction
factor
1.070 1.129 1.181 1.263 1.308
Ethylene glycol/water leaving
temperature °C
2 0 -2 -4 -6 -8
Max air ambient temperature °C
(EWAD-BJYNN)
40 39 38 37 36 35
Max air ambient temp.°C (with
OPRN/OPLN & /Q)
36 35 34 33 32 31
Max air ambient temperature °C
(/A)
44 43 42 41 40 39
Max air ambient temperature°C (/A
with OPRN/OPLN)
40 39 38 37 36 35
Max air ambient temperature (/Z) 36 35 34 33 32 31
Cooling capacity correction factor 0.842 0.785 0.725 0.670 0.613 0.562
Power input compressors
correction factor
0.95 0.94 0.92 0.89 0.87 0.84
Min. % of ethylene glycol 10 20 20 30 30 30

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