refrigeration servicesrefrigerationservicesmi.com/presentations/energy... · ·...
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Refrigeration Services
Refrigeration Energy Management
And
Control Systems
Bay County Civic Arena
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Refrigeration Services
Refrigeration Control and Energy
Management System installed at:
Bay County Civic Arena
Start up date: 01-28-2011
Chiller start up 1998
This system controls two compressors, two
cold floor brine pumps, one condenser
water pump and two condenser fans. This
system is capable of two sets of set points.
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Refrigeration Services
The two different sets of set points on this system are based on “on peak” and “off peak” electric rates from the electric utility. Every effort is made to keep equipment off during the “on peak” period and utilize the less expensive electric rates during “off peak” period. We replaced the CIMCO 3000E control system with an Allen Bradley Micro Logix PLC controller and PC. The PC is for “man-machine” interface. A “user friendly” display features graphics that display operating values. A second screen has readily accessible system setpoints.
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Refrigeration Services
This system is accessible via the internet. All displays
and setpoints that are accessible at the on site PC are
also accessible remotely. The customer requested
that we leave intact the Honeywell system for backup.
We used existing temperature sensors so as to not
disturb ice surfaces. We achieved this with a set of
“changeover” relays. This system also adjusts settings
for the condenser with a “winter” and “summer” mode
by monitoring the outdoor air temperature. In winter
mode, the condenser pump comes on last. In summer
mode, it comes on first.
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Refrigeration Services
End of Presentation
Other recent projects include new
control systems installed at the
following:
Iceland Arenas Flint, MI
Summit Ice Arena Lansing, MI