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Frequently Asked Questions
What single question separates this group?
What is inside the coil, and whether it meets the air.
Open circuit has no coil at all.
A fluid cooler has process fluid in a sealed coil.
An evaporative condenser has refrigerant in it.
Cost, size and maintenance all follow from that.
Why is an open-circuit tower the most effective?
The water evaporates directly into the airstream.
There is no tube wall for heat to cross.
Nothing removes heat more cheaply for the same duty.
It is also the smallest machine for the load.
The exposure of the water is the price of that.
What does exposing the water actually cost?
A treatment and testing regime that is not optional.
Open water collects dust and organic matter.
Evaporation concentrates dissolved solids continuously.
Both fouling and biological control need managing.
The obligation lasts as long as the tower runs.
When is a closed-circuit fluid cooler worth the premium?
When the served equipment must never see tower water.
The loop stays clean for its whole life.
It can be glycol-filled and run through a freezing winter.
It is larger and dearer for the same duty.
Heat now crosses a tube wall on the way out.
What does an evaporative condenser replace?
A cooling tower and a separate condenser.
Refrigerant condenses inside the coil directly.
The two machines become one.
The heat path is as short as it can be.
It is common in industrial refrigeration.
What do the two supporting groups cover?
The internals, and the parts that wear.
Fill and drift eliminators set thermal performance.
They also govern how much water leaves as drift.
The parts group serves an outdoor, permanently wet machine.
Neither is an alternative to the units themselves.
Which should be chosen first, the tower or the chiller?
The heat rejection route, as one decision with the chiller.
A water-cooled chiller only works with a tower behind it.
Sizing them separately produces a mismatch.
Condenser water flow and temperature link the two.
Treat them as one system from the outset.