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Development of large capacity and high efficiency rotary compressor.

Number: pap. 1314

Author(s) : JAFET FERDHY M., TOSHIMASA A., SHOUGO S., et al.

Summary

The authors had studied some elemental technologies to realize the large capacity and high efficiency of rotary compressor in order to achieve energy conservation, resource savings, and weight reduction of heat pump systems. Those elemental technologies are the cylinder dimension optimization, the new discharge structure, the divided vanes, and the compatibility between sliding loss reduction and securing reliability in journal bearings. The new discharge structure is a structure in which two discharge ports are installed per cylinder. The discharge ports at bearing and partition plate were designed with different diameter port to get a high reliability of discharge valve. By applying the new discharge structure, discharge losses drastically reduced during compression process. In order to achieve a high reliability of sliding parts, the divided DLC vanes structure and an optimization of journal bearing within enhanced shaft stiffness were applied. Hence, by adopting high efficiency 6-pole concentrated winding motor driving with PWM converter, an electric harmonic wave can be controlled to get a small loss current. By above technologies, we succeeded to develop a new compressor that can increase to the maximum refrigeration capacity 20 HP [60kW]. Compared to our conventional large model, the new model has 1.7 times larger maximum capacity, and about 6 % higher COP ratio in most operating condition range. Moreover, by the more compact and lighter weight of 38.2 kg, the new one has contributed to resource saving and weight reduction of the heat pump unit system. 4 developed compressors which are installed in air-cooled modular heat pump unit “Universal Smart X Edge Series” were able to expand up to 70HP in rated cooling capacity and achieved “IPLV 6.0” at 60 HP heat pump unit systems.

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Pages: 10

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Details

  • Original title: Development of large capacity and high efficiency rotary compressor.
  • Record ID : 30024293
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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