Analysis of noise generation mechanism for two-phase flow of refrigerant in evaporator inlet pipe of refrigerator

Jooyoung Lee; Sangheon Lee; Cheolung Cheong; Taehun Kim; Junhyo Koo

doi:10.7776/ASK.2024.43.6.593

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2024 Vol.43, Issue 6 Next Page

Research Article

Analysis of noise generation mechanism for two-phase flow of refrigerant in evaporator inlet pipe of refrigerator 냉장고 증발기 입구 배관의 냉매 이상유동에 의한 소음 발생 메커니즘 분석

30 November 2024. pp. 593-604

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Abstract

In this paper, numerical flow and acoustic analysis were conducted on the inlet piping of refrigerator evaporator, taking actual operating conditions to investigate the mechanism of refrigerant induced noise generation. Four operating conditions were selected as boundary conditions, considering the expansion process of the refrigeration cycle. Two-phase flow analysis was performed, considering temperature changes and phase transitions of the R600a refrigerant in the region from the condenser outlet to the evaporator inlet. Acoustic analysis results confirmed that the area near the evaporator inlet has a higher noise contribution compared to the capillary tube. By comparing the instantaneous sound pressure of bubbles and acoustic analysis result, pipe area for reducing refrigerant induced noise was proposed.

Keywords

Two-phase flow

Refrigerant induced noise

Numerical analysis

Vapor volume fraction

Bubble dynamics model

본 논문에서는 실제 작동 조건을 고려하여 냉장고 증발기 입구 배관에 대해 수치적으로 유동해석 및 소음해석을 진행하여 냉매음의 발생메커니즘을 분석했다. 냉장사이클의 팽창과정을 고려하여 4개의 작동조건을 선정 후 경계조건으로 부여했다. 응축기 출구부터 증발기 입구까지 영역에 대해 R600a냉매의 온도 변화 및 상변화를 고려하여 이상유동해석을 진행했다. 소음해석 결과 증발기 입구 근처 영역이 모세관 대비 높은 소음기여도를 가지는 것을 확인했다. 소음해석 결과를 기포 순간 음압과 비교하여 냉매소음 개선을 위한 배관영역을 제시했다.

키워드

이상유동

냉매소음

수치해석

기체부피분율

기포동역학

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 43
No :6
Pages :593-604
Received Date : 2024-09-04
Revised Date : 2024-09-13
Accepted Date : 2024-10-02
DOI :https://doi.org/10.7776/ASK.2024.43.6.593

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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