Noise reduction of refrigerant two-phase flow using flow conditioners near the electric expansion valve
- Authors
- Kim, Gangjune; Song, Simon
- Issue Date
- Feb-2020
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- Noise reduction; Flow conditioner; Refrigerant two-phase flow; Electric expansion valve
- Citation
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.34, no.2, pp.719 - 725
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
- Volume
- 34
- Number
- 2
- Start Page
- 719
- End Page
- 725
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/10765
- DOI
- 10.1007/s12206-020-0118-3
- ISSN
- 1738-494X
- 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.
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