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The advantages and disadvantages of water-cooled screw chillers are as follows:
Advantages of water-cooled screw chillers:
1. Simple structure, less moving parts, less wearing parts, only 1/10 of the piston type, low failure rate and long service life.
2. The circular motion is stable, there is no "surge" phenomenon during low load operation, low noise and low vibration.
3. The compression ratio can be as high as 20 and the EER value is high.
4. Convenient adjustment, stepless adjustment in the range of 10%~100%, high efficiency in partial load, and significant power saving.
5. Small size and light weight, it can be used as a fully enclosed large capacity unit.
6. Not sensitive to wet strokes.
7. It is a positive pressure operation, and there is no problem of intrusion of outside air.
Disadvantages of water-cooled screw chillers:
1. The price is higher than the piston type.
2. The single unit capacity is smaller than the centrifugal type, and the rotation speed is lower than the centrifugal type.
3. The lubricating oil system is more complicated and consumes a lot of fuel.
4. Large-capacity unit noise is higher than centrifugal type.
5. Requires high machining accuracy and assembly accuracy.