Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 55)

55 Chiller Technical Manual 7267818 V1.4.0_04_2014
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Chillers DeltaChill™ Air Cooled and FreeCool
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% / °C 20% / -7.1°C 25% / -9.6°C 30% / -12.7°C 35% / -16.4°C 40% / -21.1°C
0 4.21 3.93 3.86 3.79 3.72 3.64
5 4.20 3.94 3.87 3.81 3.73 3.65
10 4.19 3.95 3.89 3.82 3.75 3.67
15 4.19 3.96 3.90 3.83 3.76 3.69
20 4.18 3.97 3.91 3.85 3.78 3.70
25 4.18 3.98 3.92 3.86 3.79 3.72
30 4.18 3.99 3.94 3.88 3.81 3.74
35 4.18 4.01 3.95 3.89 3.82 3.75
40 4.18 4.02 3.96 3.90 3.84 3.77
45 4.18 4.03 3.97 3.92 3.85 3.78
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 1025.8 1031.0 1036.2 1040.7 1045.1
5 999.9 1024.3 1029.4 1034.5 1038.8 1043.1
10 999.7 1022.7 1027.6 1032.6 1036.8 1040.9
15 999.0 1020.9 1025.7 1030.5 1034.6 1038.7
20 998.2 1019.0 1023.7 1028.4 1032.3 1036.2
25 997.0 1017.0 1021.5 1026.1 1029.9 1033.7
30 995.6 1014.8 1019.2 1023.6 1027.3 1031.0
35 994.0 1012.6 1016.8 1021.1 1024.7 1028.2
40 992.2 1010.2 1014.3 1018.4 1021.9 1025.3
45 990.2 1007.6 1011.6 1015.6 1018.9 1022.2
Propylene Glycol Specific Heat
Propylene Glycol Density
Glycol
Design Data
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% / -2°C 20% / -6°C 30% / -12°C 40% / -20°C
Cooling Duty
Catalogue Data x by:
0.97 0.95 0.91 0.88
Input Power 0.99 0.98 0.96 0.95
Water Flow 0.98 0.97 0.95 0.95
Pressure Drop 1.08 1.17 1.31 1.45
Correction Factors