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BCWC
Water-cooled water chillers with centrifugal compressor/s
300 – 1250kW
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Water-cooled water chillers with centrifugal compressor/s
Technical cooling: efficiency &
reliability … and extreme solutions
Extreme solutions in terms of:
• Energy savings
• Noise levels
• Limited available power supply
• Weight
TechnicalCooling
TechnologicalCooling
High PerfC.C.
Process cooling
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BCWC units use "oil-free" revolutionary
technology.
• Optimum efficiency at all load conditions
• Maximum reliability
• Minimum maintenance
• Reduced dimensions and weights
• Ultra silent operation
Attracting perfection.
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300 500 700 900 1100 1300
[kW]
BRWC
BCWC
Water cooled range
Water cooled units with screw compressors
Water cooled units with centrifugal compressors
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6
• Between 1 and 4 “oil-free” centrifugal
compressors
• Single refrigerant circuit
• Flooded evaporator
• Shell & tube condenser
• Electronic expansion valve
• R134a refrigerant
Main Features
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• cooling capacity: 320kW
• compressor/s: 1
• circuit:1
BWCW0320A
300 500 700 900 1100 1300
[kW]
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• cooling capacity: 630kW
• compressor/s: 2
• circuit:1
BWCW0630A
300 500 700 900 1100 1300
[kW]
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• cooling capacity: 950kW
• compressor/s: 3
• circuit:1
BWCW0950A
300 500 700 900 1100 1300
[kW]
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• cooling capacity: 1250kW
• compressor/s: 4
• circuit:1
BWCW1250A
300 500 700 900 1100 1300
[kW]
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BCWC units use "oil-free" revolutionary
technology.
The impellers operate within a magnetic
toroidal field, avoiding mechanical friction.
BCWC units are the ideal choice for:
• Optimum efficiency at all load conditions
• Maximum reliability
• Minimum maintenance
• Reduced dimensions and weights
• Ultra silent operation
Magnetic force.
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Oli-free centrifugal compressor
Speed Control with inverter
Control of the motor and magnetic bearings
2 stages of centrifugal compression
Temperature and pressure sensors
IGV
DC/DC brushless synchronised motor
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Refrigerant flow
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Gas compression
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An “Oil-free centrifugal compressor is an
inverter-driven compressor which only
uses the IGV in extreme conditions.
BCWC units are able to adapt the cooling
capacity to the load with extreme
precision.
The T at the set-point is ±0,2°C(*)
(*)with load higher that min load
Time
Del
ta T
BCWC BRWC Traditional
Top level performance.
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Top level performance.
BCWC units are able to adapt the cooling
capacity of the compressor to the load
extremely efficiently.
The IPLV and ESEER show that the
BCWC efficiency is optimized in all
operating conditions.
0
2
4
6
8
10
12
25% 50% 75% 100%
Load [%]
EE
R
BCWC - 630kW BRWC - 630kW
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Top level performance.
-39%-38%-38%
-48%
0,0
10.000,0
20.000,0
30.000,0
40.000,0
50.000,0
60.000,0
70.000,0
80.000,0
90.000,0
100.000,0
320 650 950 1250Cooling capacity [kW]
Ru
nn
ing
co
st
[€/y
ea
r]
-100%
-90%
-80%
-70%
-60%
-50%
-40%
-30%
-20%
-10%
0%
''oil-free'' compressor chillersScrew compressor chillers% Energy saving
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Top level performance.
BCWC units have an integrated soft start.
This means a very low starting current:
• 320 kW < 2A
• 650 kW < 75A
• 950 kW <140A
• 1250 kW < 205A
Time
Cur
rent
[A
]
Time
SCR Switch-on
Cur
rent
[A
]
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“Oil-free”.
"Oil-free" means less cost!
• Reduced energy losses in the heat
exchangers
• Compressors in parallel: optimum
performance at partial loads
• Flooded evaporator: higher energy
efficiency
• No oil changes or filter replacements:
low maintenance costs
• No maintenance of the bearings: low
maintenance costs
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Flooded Evaporator.
"Oil-free" means using flooded evaporator
technology without limits.
• Increased energy efficiency:
exchange coefficient
ΔT (water/refrigerant)
• Reduced energy losses
NO superheating
decreased pressure drops
• Precise water temperature control
“accumulation” effect of refrigerant
inside the evaporator
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Cooling with style.
Lack of “physical” contact means
• high reliability
• increased energy savings.
Wear and energy losses due to friction are
eradicated.
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Reduced dimensions.
The BCWC unit is lighter and more
compact than any other compressor
with the same capacity featuring traditional
technology. 1000
2000
3000
4000
5000
6000
330 630 950 1250
Models [kW]
Wei
gh
t [K
g]
BCWC BRWC
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Low noise.
• Extremely low noise levels
• Extremely flat spectrum
• Absence of vibrations
40
50
60
70
80
90
100
330 630 950 1250
Frequency [Hz]
No
ise
po
wer
leve
l
BCWC BRWC BRWC - LN
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Low noise.
40
50
60
70
80
90
100
63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz
Frequency [Hz]
No
ise
po
wer
lev
el
BCWC - 630kW BRWC - 630kW BRWC - LN - 630kW
Screw compressor “oil-free” centrifugal
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BCWC
Water-cooled water chillers with centrifugal compressor/s
300 – 1250kW