Onion Cooling Plant

23,333 Sq. Ft. Onion Cooling Plant

Four separate cooling rooms designed for onion storage at 34F temperature and 70% humidity. Controlled by 10 separate condensing units totaling 385 HP of R404-A semi-hermetic Bitzer compressors .  Variable frequency drive condenser fan motors resulting in an approximate energy savings of 20-30%.  System is controlled by an energy efficient mainframe that controls temperature, humidity, electronic expansion valve, superheat, and evaporator fan cycling.  Defrosts are done on a demand basis as needed and pulses the defrost heaters to save energy.  Settings are changed on a mounted wireless tablet computers with remote outside access available.  Data logging with a graphical interface, and system emails keep us aware of any problems.  Provides energy savings 15-50% over mechanically controlled systems.

These condensing units utilize Bitzer compressors, which are are famous for their low sound levels. Bitzer changes capacities within a frame size by changing their bore diameters rather than the length of the piston strokes. This gives Bitzer compressors an unsurpassed balance and precision that translates to low decibels. In addition, Bitzer compressors have a muffler built into each head that eliminates pulsations and reduces the sound levels even further.  Bitzer’s centrifugal lubrication design employs a solid metal disc mounted to the crankshaft that distributes oil into a reservoir at the end of the shaft. The oil then flows through the shaft to the bearing surfaces.

ROOM 1

ROOM 1

ROOM 2

ROOM 2

ROOM 3

ROOM 3

ROOM 4

ROOM 4

TABLET CONTROLS

TABLET CONTROLS

PANEL

PANEL

COMPRESSOR

COMPRESSOR

CONDENSING UNITS

CONDENSING UNITS

CONDENSING UNIT

CONDENSING UNIT

PIPING

PIPING