Airedale LogiCool FreeCool 40kW - Manual (Page 21)

Chillers LOGICOOL
™
Chillers
21
Technical Manual : 6521355 V1.8.0 07/2014
Performance Data
CAPACITY DATA - FREE COOLING
Determine the Free Cooling capacity as follows using the graphs provided:
Example Model Ref. = LCC40
Ambient: = 35°C
Fluid = 20% Ethylene Glycol
Inlet Fluid Temp. = 7°C
Outlet Fluid Temp. = 12°C (5°C

T)
Customer Permanent Head Load = 20 kW
Calculate Waterflow l/s
Flow =
Output
3.9 x ΔT
Flow =
33.7
3.9 x 5
Flow = 1.73 l/s
Select Free Cooling Curve ΔTFC (°C)= Return Water Temp - Ambient Temp
ΔTFC (°C)= 15 - 5
ΔTFC (°C)= 10°C
Free Cooling (kW) As plotted on graph = 30kW
Where:
Output = (kW)
Cooling Duty, Output kW, refer to Capacity Data - DX (Mechanical) Cooling ,
on page 20
ΔT = (°C) Difference of Entering Water and Leaving Water temperature
ΔTFC = (°C) Difference of Leaving Water temperature and Ambient temperature
All performance data is supplied in accordance with BS EN 14511-1:2013