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Supplier Tips

COMPARISON OF PORTABLE AND
CENTRAL CHILLERS

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OVERVIEW
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This FYI compares some of the differences between portable chillers and central chillers. Although they both are refrigeration devices for heat transfer, they are two different breeds. Portable chillers are designed to cool one use point while central chillers are designed to provide cooling water to an entire facility and servicing multiple use points.

Since the objectives of these chillers are radically different, they therefore, are different. In some cases portable chillers can be ‘modified’ with some standard options to act as a central chiller. However, the portable chiller does not and will not provide all the benefits of a central chiller.

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Both have their place in the heat transfer market. But if selected improperly or expected to perform beyond design specifications, then issues will arise along with operator frustration.

This comparison pertains to Advantage Engineering Maximum portable chillers and Titan central chillers.

​REFRIGERANT CIRCUITS​

Quantity of refrigeration circuits:
PORTABLE: Single  CENTRAL: Multiple

 

Expandability:
PORTABLE: None  CENTRAL: Yes

Capacity staging:
PORTABLE: 50%  CENTRAL: Down to 15% in some cases

Redundancy (i.e. backup):

PORTABLE: None  CENTRAL: Yes

Air discharge (air condensed units)

PORTABLE: Typically Into Plant  CENTRAL: Outdoors via Outdoor Condenser

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INSTRUMENTATION​

Controller
PORTABLE: Single Circuit Control  CENTRAL: Multiple Ciruit Control

 

Redundancy:
PORTABLE: None  CENTRAL: Yes

INSTALLATION REQUIREMENTS​


PORTABLE: Relative Very Little  CENTRAL: A lot

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FLUID COOLANT​

Quantity of use point design

PORTABLE: Single  CENTRAL: Multiple
 

Reservoir capacity

PORTABLE: Small  CENTRAL: Large
 

Fluid flywheel

PORTABLE: Little If Any  CENTRAL: Large
 

Thermal mass

PORTABLE: Little If Any  CENTRAL: Large
 

Dedicated evaporator pump:
PORTABLE: No  CENTRAL: Yes
 

Dedicated process pump:

PORTABLE: No  CENTRAL: Yes
 

Low flow bypass:

PORTABLE: Required  CENTRAL: Not Needed
 

Pump Redundancy (i.e. backup):

PORTABLE: None  CENTRAL: Yes
 

Larger pumping capability:

PORTABLE: Limited  CENTRAL: Relative Unlimited
 

Drain back prevention:

PORTABLE: Required  CENTRAL: Vacuum Breakers

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