1

BCWC

Water-cooled water chillers with centrifugal compressor/s

300 – 1250kW

2

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

3

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.

4

300 500 700 900 1100 1300

[kW]

BRWC

BCWC

Water cooled range

Water cooled units with screw compressors

Water cooled units with centrifugal compressors

5

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]

8

• cooling capacity: 630kW

• compressor/s: 2

• circuit:1

BWCW0630A

300 500 700 900 1100 1300

[kW]

9

• 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

31

BCWC

Water-cooled water chillers with centrifugal compressor/s

300 – 1250kW