Supplier Tips
COMPARISON OF PORTABLE AND
CENTRAL CHILLERS
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