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7.1.1
Calculation of total minimum water content, total optimal water content and flow rates
The chiller needs values of total minimum and total optimal water content according to the following tables:
CCUF
Plant side cold water heat exchanger
Vopt Vmin K Q min Q max
[m3] [m3] [m3/h] [m3/h]
One refrigerant circuit sizes
0,45 0,26 365,3 5,6 14,9
0,57 0,32 352,4 7,1 18,9
0,69 0,39 182,4 8,6 22,9
0,78 0,45 178,5 9,8 26,1
1,07 0,61 73,8 13,4 35,6
1,17 0,67 72,7 14,7 39,2
1,28 0,73 71,7 16,0 42,6
Two refrigerant circuits sizes
LEGEND:
V
: minimum/optimal water content of the plant
Q min
: minimum water flow to the heat exchanger
Q max
: maximum water flow to the heat exchanger
ΔTmax chiller = 10°C
ΔTmin chiller = 3°C
dpw = K·Q² / 1000 Q = 0,86 P/ΔT
IMPORTANT: If pump driven by an inverter (either unit onboard pump or external pump) in every working
condition the variation of the water flow rate must be as low as possible. Variation must be less than 10% of the
nominal flow rate per minute