Noise Analysis and Reduction Methods of the All-in One Window Ventilation System

Chan-Jae Park; Chan-Hoon Haan

doi:10.7776/ASK.2013.32.1.043

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2013 Vol.32, Issue 1 Preview Page Next Page

Noise Analysis and Reduction Methods of the All-in One Window Ventilation System 창호일체형 환기장치의 소음분석 및 저감방안

31 January 2013. pp. 43-55

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Abstract

The window ventilation system based on the heat recovery device was developed which make air ventilation possible without opening the windows. However, mechanical and aerodynamic noises were come to pass which annoyed people in rooms. In the present study, noise of new window ventilation system was measured in both general room and anechoic chamber. Also, the noise path was detected to find cause of noise generation and vulnerable area of the device. Sound absorptive and insulation materials were applied to mitigate the noise. Finally, an alternative noise control method was suggested which can satisfy with the indoor noise standards. As a result, it was shown that the cause of noise was the low transmission loss in the ventilation system. As a result, it was shown that the main noise source of the ventilation system was the blower and the major cause of noise was the low transmission loss of the ventilation system. It is also concluded that the noise levels complies with the noise standards of 40 dBA when 2 mm rubber sheet is applied inside the ventilation system.

Keywords

All-in one window-ventilation system

Machinery noise

Aerodynamic noise

Vibration

Noise reduction

Noise insulation

Noise insulation material

최근 창호의 창틀에 폐열회수장치를 삽입한 일체형 환기장치인 일명 “창호일체형 폐열회수 환기장치”를 개발됨으로써 창문을 열지 않고도 에너지 손실을 최소화하면서 실내외 공기를 교환할 수 있게 되었다. 그러나 이 장치의 작동시 기계소음과 공력소음이 발생하여 실제 주거시설에 적합하지 않은 면이 있다. 따라서 본 연구에서는 창호일체형 환기장치의 소음을 설치상태와 무향실에서 측정하고 소음의 발생 원인과 소음전달 취약부분을 분석하였다. 또한, 창호일체형 환기장치내의 차음재와 흡음재를 설치하여 소음을 제어하기 위한 대안을 제시하였다. 연구결과, 환기장치의 소음원은 블로워로 나타났으며 소음의 주된 누출 원인은 환기장치 구조체의 낮은 차음성능 때문이었음을 알 수 있었다. 또한 이를 제어하기 위하여 장치 내부에 고무시트 등의 차음재를 설치한 결과 폐열회수환기장치의 소음기준인 40 dBA 이하를 만족함을 알 수 있었다.

키워드

창호일체형 환기장치

기계소음

공력소음

진동

소음제어

방음

차음재

References

C. H. Haan, The report of Noise Reduction Methods of the All-in One Window Ventilation System (Chungbuk National University Industry Academic Cooperation Foundation, 2011).

C. J. Park, G. S. Cho, C. H. Haan, "Noise analysis of the ventilation device of all-in one window system" (in Korea), J. Acoust. Soc. Kr. Suppl. 1(s) 31, 66-74 (2012).

D. J. Kang, J. H. Gu and J. W. Lee, "Sound power level of electric home appliances according to measurement method," J. Noise and Vibration Eng. Soc. Kr. 19, 335-346 (2009).

10.5050/KSNVN.2009.19.4.335

J. Y. Chung, S. J. Hong, J. B. Im and K. W. Kim, "Acoustic performance of heat recovery ventilators," J. Noise and Vibration Eng. Soc. Kr. Suppl. (s), 310- 311 (2009).

W. J. Cavanaugh and J. A. Wilkes, Architectural Acoustics - Principles and Practice (John Wileys & Sons, New York, 1999).

10.1121/1.426953

KS F 2814, Determination of Sound Absorption Coefficient and Impedance in Impedance Tubes - Part 1：Method Using Standing Wave Ratio, 2001.

KS A ISO 3745, Acoustics - Determination of sound Power Levels and Sound Energy Levels of Noise Sources-Precision Methods for Anechoic and Semi- Anechoic Rooms, 2002.

KS B 6879, Heat-Recovery Ventilators, 2007.

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 : 32
No :1
Pages :43-55
Received Date : 2012-08-16
Revised Date : 2012-10-16
Accepted Date : 2012-12-11
DOI :https://doi.org/10.7776/ASK.2013.32.1.043

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

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