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A chiller is a liquid chilling system
that cools a secondary coolant (usually water) for centralized air
conditioning systems. The basic components of a vapor-compression
liquid chilling system include a compressor, a liquid cooler
(evaporator), a condenser, a liquid refrigerant expansion or flow
control device and a control center. |
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A multiple chiller system has two or
more chillers connected by parallel or series piping to a common
distribution system. Multiple chillers offer operational
flexibility, standby capacity, and less disruptive maintenance. The
chillers can be sized to handle a base load and increments of a
variable load to allow each chiller to operate at its most efficient
point. Multiple chiller systems offer some standby capacity if
repair work must be done on one chiller. Starting in-rush current is
reduced, as well as power costs at partial load conditions.
Maintenance can be scheduled for one chilling machine during part
load times, and sufficient cooling can still be provided by the
remaining unit(s). However, these advantages require an increase in
stalling costs and space. |
