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Noise reduction in bus A/C systems with screw compressors. II. Compressor with system interaction.

Author(s) : SJOHOLM L., GLEASON S., MA Y. C.

Summary

This paper evaluates screw compressors with different features and the response of bus air-conditioning (A/C) systems to those features from a sound and vibration perspective. Due to the relatively high discharge pulsation frequency of the screw compressor, the resonance situation in bus A/C systems can be challenging. Evaluations are for complete bus A/C systems in which the compressor is belt-driven from the bus engine. Results are presented for both steady state operation and the transient conditions encountered with start/stop operations and gear changes during road tests. Data from a common coach bus with one rooftop unit and an articulated transit bus with two rooftop units are presented for systems with noise problems resolved using screw compressors with modified features. See also this Bulletin, reference 2008-2714.

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Details

  • Original title: Noise reduction in bus A/C systems with screw compressors. II. Compressor with system interaction.
  • Record ID : 2008-2715
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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