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  1. Screw1

    Convert low temperature waste heat into power

    During compression, lots of heat is generated. With oil injected screw technology, this heat is approx. 60..80° above ambient. With oil free techonology, this can go up to 180°..200° above ambient. This is quite some waste heat (80% of shaft input). Is it feasible to convert part of this heat...
  2. Screw1

    Noise and vibration occuring at 120, 126 and 162 motor harmonics

    Thanks for all comments and suggestions. Some extra data: - it's a screw compressor with 4 lobes on male and 6 lobes on female - vibration peaks remain at same frequencies, regardless of gear sets (different transmission ratios have been tried) - motor speed is around 1500 rpm (4 pole AC motor)...
  3. Screw1

    Noise and vibration occuring at 120, 126 and 162 motor harmonics

    I'm coping with a new compressor drive train showing noise and vibrations peaks at 120, 126th and 162th motor order. I haven't found a plausible explanation for this orders. What can be the cause of such high motor orders? They don't coincidence with any of the typical frequencies one can expect...
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