100 Ton Chiller
Aqua-Air Manufacturing is proud to have been chosen to supply two 100 ton (1,200,000 BTU/H) two stage screw compressor chiller units for the chiller refit project on a motoryacht built by Benetti in 2000. The complete installation will be handled by Elite Marine A/C of Fort Lauderdale, Florida.
The OM100P2GEK Chiller Unit main components are two 50 Ton (600,000 BTU/H) Bitzer Screw Compressors, 75 HP Variable Frequency Drives (VFD's), 60 Ton Shell and Tube Condensers, 100 Ton 2 Circuit Brazed Plate Evaporator and 50 Ton Electronic Expansion Valves (EEV’s). The overall capacity of each compressor is modulated through the use of four capacity unloaders. Each compressor can have its capacity reduced to a minimum of 12.5 Tons which is 25% of its maximum output. As the chillwater loop further decreases in temperature the VFD's will reduce compressor speed by 33% reducing capacity to about 8.3 tons. The VFD's also provide for surgeless starting. The current draw of the unit will never exceed its rated running amperage draw. Operation of the unit is handled by the Aqua-Air PLC/Touchscreen System that was specifically designed for this project.
The OM100P2VGEK Chiller Unit is 116” long x 49” wide x 76” high and weighs approximately 5,500 lbs.
The Bitzer Screw Compressors are mounted at an angle to assure oil return under all sea conditions.
This particular unit is very unique in that it was designed from the very beginning with the concept in mind that the entire unit must be able to be disassembled and carried into the yacht through the engineroom. This was accomplished by a significant amount of planning in the design phase. The unit was designed entirely in SolidWorks 3D Software which allowed us to visualize the unit from all angles and create the best possible unit for the space provided. The two OM100P2VGEK chillers are replacing two existing open drive compressor chillers units.
Another unique feature is how seawater is distributed to the seawater condensers. Seawater from a centralized ships source is regulated to each Shell & Tube Condenser through the use of 4-20mA input Modulating Butterfly Valves. An Aqua-Air PLC with Touchscreen Interface monitors the individual compressor discharge pressures through the use of refrigerant pressure transducers and controls the inlet and bypass water regulating valves for each condenser. Discharge pressure is maintained at a perfect 225 psig under all seawater temperature conditions.
This page was last updated: April 12, 2015