You may also be interested in
Technical documentation
New variable speed-driven screw compressors Advantages of the Rotatune concept
Accurate control and indication ofthe capacity YORK Refrigeration has developed three new ammoniaRotatune
screw compressors as a supplement to the exist-
ing range ofrenowned YORK
screw compressors.The Rotatune concept is based on the use ofa frequencyconverter and high-speed motors.This provides a number
ofdistinct advantages.The new
compressors have been
developed on the basis ofthe existing SAB screw compres-
sor programme and they will be delivered as complete fac-
tory-mounted units.The variable
compressor speed – ie the
capacity – is controlled by the well-known Unisab control
system.
• •
Increased COP compared with normal 3000/3600 rpm
compressors.
•
Very high COP even at part load
•
A low starting current and high power factor avoid heavy demands on the electrical system
•
Low average noise level
•
Fewer movable parts result in increased reliability and reduced maintenance costs
•
Full economizer effect at part load.
