What Exactly Are Closed-Loop Chillers?
Closed-loop chillers are recirculating systems that interchange heat from various industrial and commercial operations by using coolant fluid in a closed-loop arrangement.
The coolant used in a closed-loop chiller can be any of the following:
- Water and water-based coolants (de-ionized water, water/glycol blends, and water-based synthetic coolants)
- Coolants based on oil and oil-based coolants
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The coolant is refrigerated in a coolant tank before being routed through a
heat load and absorbing heat from industrial operations or equipment. The
heat received from the heat load is dissipated in an evaporator before
returning to the coolant tank for re-cooling and recycling via the
closed-loop system.
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The temperature of the coolant is controlled by a thermostat that
monitors temperature changes within the coolant tank. This thermal
controller then adjusts the evaporator's refrigeration effect to ensure
that the fluid in the coolant tank is at an ideal temperature for its next
interaction with the heat load.
The Advantages of Closed-Loop Water Chiller Systems
A closed system provides a number of advantages, including:
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lower sewer usage expenses due to a reduction in the volume of water
required for the cooling limiting the flow of toxins into bodies of water
that may be damaging to aquatic life providing considerable long-term
returns on investment.
A closed-loop water chiller consumes extremely little water after it is set
up due to its sealed design and cyclical mechanism of operation. Water is
only lost in trace amounts during component maintenance, with annual fluid
losses totaling only a few gallons.
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