AIREDALE LogiCool LCC20 - Glycol Data

LOGICOOL™
Chillers
22
Chillers
Technical Manual : 6521355 V1.14.0 11/2016
Performance Data
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
All free-cooling units should use a MINIMUM 20% glycol concentration.
Ethylene Glycol Nominal Correction Factors
Glycol in System / Freezing Point ºC
20% / -9°C
30% / -15°C
40% / -23°C
Output (kW)
x
1.00
0.98
0.96
Input (kW)
1.00
0.98
0.97
Water Flow (l/s)
1.00
1.09
1.12
Pressure Drop (kPa)
1.00
1.29
1.48
Propylene Glycol Nominal Correction Factors
Glycol in System / Freezing Point ºC
20% / -6°C
30% / -12°C
40% / -20°C
Output (kW)
x
0.98
0.94
0.91
Input (kW)
1.00
0.98
0.97
Water Flow (l/s)
1.00
0.99
0.99
Pressure Drop (kPa)
1.08
1.22
1.35
Example
Model Ref. = LCC40
Ambient: = 35°C
Fluid = 30% Ethylene Glycol
Inlet Fluid Temp. = 7°C
Outlet Fluid Temp. = 12°C (5°C  T)
Catalogue
Multiplier
Corrected Figure
Output (kW)
=
33.7
x 0.98
=
33.0 kW
Compressor Input (kW)
14.4
x 0.98
=
14.1 kW
Water Flow (l/s)
Output
1.99
x 1.02
=
2.03 l/s
3.9 x ΔT
Pressure Drop (kPa)
Plot from curve (refer to Waterside
Pressure Drop (kPa), on page 23)
128
x 1.15
=
147.2 kPa
Where:
Output = (kW) Output kW, refer to Capacity Data - DX (Mechanical) Cooling, on page 19
Input = (kW) Input kW, refer to Capacity Data - DX (Mechanical) Cooling, on page 19
ΔT = (°C) Difference of Entering Water and Leaving Water temperature