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The effect of biphasic refrigerant flow on refrigerator noise.

Number: pap. 2139

Author(s) : VENDRAMI C. E., MIGUEL E., SOUZA D. de, et al.

Summary

Nowadays, sound level and sound quality are two very important buying criteria for the final users of a household or light commercial appliance. In order to assure good noise levels, the choice of a compressor with low noise at a specific condition is not the only point to care; it is important to evaluate the transient noise as well. The goal of this paper is to present two studies, the first one showing how a biphasic flow in the suction line, close to the compressor in a drinking fountain, can create transient noise due to the excitation of the compressor gas cavity. The second case concerns the flow noise generated by the refrigerant in the capillary tube. In both cases, thermocouples are placed in different parts of the refrigeration unit in order to better understand the behavior of the refrigerant flow and its correlation with the thermal profile. Different refrigerant charges are tested, verifying the thermodynamic and acoustic behavior of the units. Some different control techniques are also tried, aiming to avoid undesired noise (pure tone, for instance) and to reduce the overall levels. Finally, a proposed refrigerant charge is set, assuring a good trade-off regarding noise and thermodynamic performance.

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Pages: 10

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Details

  • Original title: The effect of biphasic refrigerant flow on refrigerator noise.
  • Record ID : 30024414
  • Languages: English
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

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