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Investigation of the effect of inverters on the power supply and the performance of variable speed refrigeration systems.

Author(s) : QURESHI T. Q., TASSOU S. A.

Summary

The results of an experimental investigation indicate that the efficiency of variable speed refrigeration systems at part load is severely affected by the poor performance of induction motors. The harmonic analysis showed that the total current harmonic distorsion on the supply side increased with a decrease in speed and load. This can cause power quality problems and can contribute to a reduction in the power factor. The net efficiency gains from variable speed operation at part load conditions do not outweigh the higher capital cost of the system and overcome the concerns about the effects of the inverter on the supply and the motor. The attractiveness of positive displacement variable speed refrigeration systems will increase considerably if motors are developed whose efficiency remains fairly constant at part load conditions.

Details

  • Original title: Investigation of the effect of inverters on the power supply and the performance of variable speed refrigeration systems.
  • Record ID : 1995-0859
  • Languages: English
  • Source: Proceedings of the 1994 International Refrigeration Conference at Purdue.
  • Publication date: 1994/07/19
  • Document available for consultation in the library of the IIR headquarters only.

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