It is a type of gas compressor, that uses a rotary-type positive-displacement mechanism. This compressor replaced piston compressors, which need large volumes of high-pressure air. It is used in chillers providing small to medium cooling load, typically up to 2,100 kW.

How does a single screw compressor work?

Differently form a screw compressor, it uses one main screw mashing with twin star rotors to produce volume matching compression cycle. Due to the main rotor, balanced in both radial and axial direction, the compressor bearing has extremely high reliability. Therefore, its life span can be as long as 10,000 hours longer than other screw compressors. The single screw compressor, then, has only three moving parts. As a result of that, it reduces the possibility of failure and keeps operation costs low.

Daikin leadership in compressor development

Daikin has a history of leadership in the field of single screw compressor chillers, which have been installed all over the world for 20 years. Over time, Daikin has introduced and integrated ground-breaking technology directly into the design of its single screw compressor. Constantly pushing its development towards a new and innovative direction.

Technologies like the Variable Volume Ratio (VVR), or the refrigerant cooled inverter technology, for instance, have been directly integrated in the single screw compressor design. All of these technologies have helped increasing compressors and chillers’ efficiency. And have helped doing it with a particular attention to part load.

In fact, because a chiller operates most of its time at part load, to be efficient, it must have a high part load efficiency.

Daikin has considered that. And has also considered the need from the market for always higher efficiency performance, plus the need to comply with regulations. Those are the considerations that have recently led to introducing a completely new single screw compressor design.