Airedale LogiCool FreeCool 40kW Instrukcja Użytkownika Pobierz pdf (Strona 23)

Chillers

LOGICOOL™

Chillers

Technical Manual : 6521355 V1.8.0 07/2014

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)

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)

0.98

0.94

0.91

Input (kW)

1.00

0.98

0.97

Water Flow (l/s)

1.00

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



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 24)

128

x 1.15

147.2 kPa

Where:

Output = (kW) Output kW, refer to Capacity Data - DX (Mechanical) Cooling, on page 20

Input = (kW) Input kW, refer to Capacity Data - DX (Mechanical) Cooling, on page 20

ΔT = (°C) Difference of Entering Water and Leaving Water temperature

All performance data is supplied in accordance with BS EN 14511-1:2013

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 39 40

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