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Development of the new design two-stage semi-hermetic single screw compressor for heat pump.

Number: 1305

Author(s) : IMAMURA Y., INOUE T., TAKAHASHI K., UEMURA Y., MIYAMURA H.

Summary

Recently, due to climate crisis and to reduce the dependency of fossil fuel, legislators in both Europe and North America are implementing policies to phase out fossil fuels for heating. This has resulted to a rapid expansion of demand for heat pumps. Even in low outdoor temperature regions such as Northern Europe, the replacement fossil fuel heating with heat pump heating is required, which necessitates a high-pressure ratio compressor that significantly exceeds traditional air conditioning compressor operating conditions.
Although a two-stage compression process is generally more efficient than single-stage compression one at high pressure ratio, a compressor configuration that requires multiple compressor units to achieve the necessary compression increases production costs. Specifically, such traditional configurations include compressors arranged in series or two-stage compressors with two series compression mechanisms within a single casing.
Therefore, a compressor capable of achieving two-stage compression with the same number of parts as a traditional single screw compressor, thus leveraging the unique characteristics of the single screw compressor that forms independent upper and lower compression chambers with one screw rotor and meshing two gate rotors. A prototype compressor consisting of a two-stage semi-hermetic single screw compressor has been operated and tested. This paper reports the results of characteristics and challenges extracted from this investigation.

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  • Original title: Development of the new design two-stage semi-hermetic single screw compressor for heat pump.
  • Record ID : 30033597
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Publication date: 2024/07/18

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