Chillers turbochill™ air cooled and freecool, Desi gn – Airedale TurboChill FreeCool 200kW - 1830kW User Manual
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Chiller Technical Manual 7525355 V1.1.0_03_2013
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Chillers
TurboChill™ Air Cooled and FreeCool
Performance Effects of Glycol
Glycol Data
For a given percentage of glycol in the system there are correction factors that need to be applied, the following tables
can be used as a guide.
CAUTION
The source data must be 100% water for the correction factors to be valid.
Ethylene Glycol Nominal Correction Factors
Glycol in System / Freezing Point °C
10% / -4°C
20% / -9°C
30% / -15°C
40% / -23°C
Output (kW)
x
0.98
0.97
0.95
0.93
Compressor Input (kW)
0.99
0.98
0.96
0.95
Water Flow (l/s)
0.99
1.02
1.04
1.07
Pressure Drop (kPa)
1.05
1.20
1.38
1.57
Propylene Glycol Nominal Correction Factors
Glycol in System / Freezing Point °C
10% / -2°C
20% / -6°C
30% / -12°C
40% / -20°C
Output (kW)
x
0.97
0.95
0.91
0.88
Compressor Input (kW)
0.99
0.98
0.96
0.95
Water Flow (l/s)
0.98
0.97
0.95
0.95
Pressure Drop (kPa)
1.08
1.17
1.31
1.45
Example:
At 100% Water:
Output
=750
kW
Compressor Input
=228.6 kW
Flow Rate
=35.83 l/s
Pressure Drop
=20.6 kPa
Ambient
=35°C
Inlet Fluid Temp.
=7°C
Outlet Fluid Temp.
=12°C (5K ∆T)
To 20% Ethylene Glycol:
100% Water
Multiplier
20% Ethylene Glycol
Output (kW)
750
x 0.97
727.5 kW
Compressor Input (kW)
228.6
x 0.98
224.0 kW
Water Flow (l/s)
35.83
x 1.02
36.55 l/s
Pressure Drop (kPa)
20.6
x 1.20
24.72 kPa