Chillers deltachill™ air cooled and freecool, Desi gn, Design data – Airedale DeltaChill FreeCool 110kW - 1080kW User Manual
Page 54: Glycol, Correction factors
54
Chiller Technical Manual 7267818 V1.4.0_04_2014
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esi
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Chillers
DeltaChill™ Air Cooled and FreeCool
Design Data
Glycol
Glycol is recommended when a supply water temperature of +5°C or below is required or when static water can be
exposed to freezing temperatures (lower than 3°C Ambient). This is specified further in the environmental consideration
section at the front of this document.
Glycol Percentage / Freezing Point
Temperature °C
0% / 0°C
20% / -7.8°C
25% / -10.7°C
30% / -14.1°C
35% / -17.9°C
40% / -22.3°C
0
4.21
3.77
3.68
3.59
3.50
3.40
5
4.20
3.78
3.69
3.60
3.51
3.42
10
4.19
3.79
3.71
3.62
3.53
3.44
15
4.19
3.80
3.72
3.63
3.54
3.45
20
4.18
3.82
3.73
3.65
3.56
3.47
25
4.18
3.83
3.74
3.66
3.57
3.49
30
4.18
3.84
3.76
3.67
3.59
3.50
35
4.18
3.85
3.77
3.69
3.60
3.52
40
4.18
3.86
3.78
3.70
3.62
3.54
45
4.18
3.87
3.79
3.72
3.63
3.55
Glycol Percentage / Freezing Point
Temperature °C
0% / °C
20% / -7.1°C
25% / -9.6°C
30% / -12.7°C
35% / -16.4°C
40% / -21.1°C
0
999.8
1035.7
1043.7
1051.8
1059.3
1066.8
5
999.9
1034.4
1042.4
1050.3
1057.8
1065.2
10
999.7
1032.9
1040.9
1048.8
1056.1
1063.5
15
999.0
1031.4
1039.2
1047.1
1054.4
1061.7
20
998.2
1029.7
1037.5
1045.3
1052.5
1059.7
25
997.0
1027.9
1035.6
1043.3
1050.5
1057.6
30
995.6
1026.0
1033.6
1041.3
1048.3
1055.4
35
994.0
1024.0
1031.5
1039.1
1046.1
1053.1
40
992.2
1021.8
1029.3
1036.8
1043.7
1050.6
45
990.2
1019.6
1027.0
1034.4
1041.2
1048.1
Ethylene Glycol Specific Heat
Ethylene Glycol Density
Kw =ρ x m x Cp x ∆t
Where
kW = Cooling Performance (KW)
ρ =
Density of cooling medium (kg/m³)
m = mass flow of cooling media (kg/s)
Cp = Specific heat Capacity (kj/kg K)
∆t = Temperature difference between Inlet and Outlet (K)
Glycol in System / Freezing Point ºC
10% / -4°C
20% / -9°C
30% / -15°C
40% / -23°C
Cooling Duty
Catalogue Data x by:
0.98
0.97
0.95
0.93
Input Power
0.99
0.98
0.96
0.95
Water Flow
0.99
1.02
1.04
1.07
Pressure Drop
1.05
1.20
1.38
1.57
Correction Factors