INDUSTRIAL FREEZING AND CHILLING SPECIALISTS
Electric Motors Cut Food Processor's Energy Bills
Dyneo permanent magnet electric motors from Leroy Somer fitted to compressors are
at the heart of an innovative new industrial refrigeration system the first of its kind installed in Europe. Charleville Foods at
Ardnageehny in County Cork, Ireland, needed to update and expand its beef chilling, offal processing and dispatch areas to improve
the efficiency of its production plant.
The factory handles approximately 112 tonnes of meat during a typical day but a substantial
percentage is lost through evaporation. Industrial refrigeration specialists NH3 Refrigeration, of Newmarket, Suffolk, were set the
task to find a way of combating this.
NH3 managing director Johnathan Ball takes up the story: Refrigeration systems by their nature
dehumidify air and as a consequence you lose moisture from the product. This shrinkage of the meat combined with the substantial number
of cattle being slaughtered for the chilling processes, meant these losses soon built up. At NH3 we have developed a refrigeration
system which can guarantee a very low weight loss and in doing so improve the volume of the product leaving the factory gate. Our
experience in installing the system around the world has shown it to be a success.
For the Charleville Foods plant, NH3 designed
and installed a new industrial refrigeration system running on ammonia with zero ozone depletion properties and in doing so significantly
reduced the plants CO2 emissions.
Two new Mycom compressors fitted with Leroy Somer energy saving inverter-based electric motors
are at the heart of the 2400kW system. NH3 say that the Leroy Somer Dyneo electric motors with their permanent magnet construction,
combined with the Powerdrive inverter, are the best way of achieving the energy efficiencies needed at the plant.
The inverter with
its variable speed control delivers considerable energy savings. The stop-start mechanism ensures that the compressors are working
at full power only when necessary reducing the refrigeration systems energy bills at Charleville Foods by as much as eight per
Mr Ball added: The Leroy Somer variable speed drive electric motors give a dramatic efficiency improvement over and above standard
electric motors. The frequency-based inverter decreases or increases the speed of the compressor when the system requires it. So far
our improvements have delivered a substantial decrease in the volume of meat being lost but with the amount processed at the plant
on a daily basis this is having a significant impact on output.
Dyneo electric motors with permanent magnet rotor technology are
smaller and more efficient than conventional machines. They have:
· IP 55 construction in accordance with IEC 60034
· power rating
from 0.75 to 400 kW
· torque from 1 to 1400 N.m
· speed from 1 to 5500 min-1
· frame size from 90 to 315 mm.
NH3 contracts manager
Joe Kraemer is also happy with the contribution made by the Dyneo electric motors: It was a challenging project and a number of innovations
were needed. Its the first time we have used the Leroy Somer permanent magnetic motor with the variable speed drive on the Mycom
compressor. Its working well. Its also the first time this system has been installed at a plant in Europe and were very pleased
with the outcome.
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