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Journal of Mechanical Science and Technology

, Volume 34, Issue 2, pp 719–725 | Cite as

Noise reduction of refrigerant two-phase flow using flow conditioners near the electric expansion valve

  • Gangjune Kim
  • Simon SongEmail author
Original Article
  • 7 Downloads

Abstract

Two-phase flow, particularly generated in an expansion device, is a primary cause of refrigerant-induced noise in an air-conditioning system. The indoor unit (IDU) of a multi-split air source heat pump (ASHP) for both heating and cooling must include an electric expansion valve (EEV); therefore, consumers have perceived the increased noise. To reduce this noise, we experimentally investigated the two-phase flow and consequent noise by applying a honeycomb and porous metal as a flow conditioner to the EEV in the IDU of a multi-split ASHP. Flow conditioning near the EEV with the honeycomb and porous metal made the two-phase flow steadier and more uniform, leading to reduced noise and frequency variation for the three heat operation modes of a multi-split ASHP. The noise reduction was also verified in the transient operating modes of a real IDU.

Keywords

Noise reduction Flow conditioner Refrigerant two-phase flow Electric expansion valve 

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Notes

Acknowledgments

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science, ICT, and Future Planning) (No. 2016R1A2B3009541), and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20184010201710).

References

  1. [1]
    T. Umeda, T. Fukushima, S. Nakamura and T. Fukano, Reduction of intermittent noise caused by gas-liquid two-phase refrigerant flow through an expansion valve, KSME/JSME Thermal and Fluid Engineering Conference (1994) 39–43.Google Scholar
  2. [2]
    H. S. Han, W. B. Jeong, M. S. Kim, S. Y. Lee and M. Y. Seo, Reduction of the refrigerant-induced noise from the evaporatorinlet pipe in a refrigerator, International Journal of Refrigeration, 33 (2010) 1478–1488.CrossRefGoogle Scholar
  3. [3]
    B. Demirtekin, Flow-induced noise in refrigerators, INTER-NOISE and NOISE-CON Congress and Conference Proceedings, Institute of Noise Control Engineering (2016) 7705–7715.Google Scholar
  4. [4]
    G. Kim, J. Lee, J. Park and S. Song, Flow visualization and noise measurement of R410A two-phase flow near electric expansion valve for heating cycle of multi-split air-source heat pump, Applied Thermal Engineering, 157 (2019) 113712.CrossRefGoogle Scholar
  5. [5]
    S. Hirakuni, M. Nakayama, H. Makino, A. Mochizuki and Y. Sumida, Noise reduction technology with porous metal for refrigerant two-phase flow through the expansion valve, International Refrigeration and Air Conditioning Conference (2004).Google Scholar
  6. [6]
    H. S. Han, W. B. Jeong, S. Aoyama and J. Y. Mo, Experimental analysis for reducing refrigerant-induced noise of 4-way cassette type air conditioner, Journal of Mechanical Science and Technology, 23 (2009) 1456–1467.CrossRefGoogle Scholar
  7. [7]
    C. B. Neto, C. Melo, A. Lenzi and A. L. Caetano, Noise generation in household refrigerators: An experimental study on fluid borne noise, International Refrigeration and Air Conditioning Conference (2014).Google Scholar
  8. [8]
    C. Farell and S. Youssef, Experiments on turbulence management using screens and honeycombs, Journal of Fluids Engineering, 118 (1996) 26–32.CrossRefGoogle Scholar
  9. [9]
    A. Welsh, Low turbulence wind tunnel design and wind turbine wake characterization, Master’s Thesis, Univ. of Wisconsin-Milwaukee (2013).Google Scholar
  10. [10]
    G. S. Settles, Schlieren and Shadowgraph Techniques: Visualizing Phenomena in Transparent Media, Springer Science & Business Media (2012).zbMATHGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringHanyang UniversitySeoulKorea
  2. 2.Institute of Nano Science and TechnologyHanyang UniversitySeoulKorea

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