Browse > Article
http://dx.doi.org/10.7776/ASK.2010.29.8.497

Evaluation of Noise Reduction Performance of HVAC System for Ships  

Kim, Sang-Ryul (한국기계연구원 음향소음팀)
kim, Hyun-Sil (한국기계연구원 음향소음팀)
Kim, Jae-Seung (한국기계연구원 음향소음팀)
Kim, Bong-Ki (한국기계연구원 음향소음팀)
Lee, Sung-Hyun (한국기계연구원 음향소음팀)
Publication Information
The Journal of the Acoustical Society of Korea / v.29, no.8, 2010 , pp. 497-503 More about this Journal
Abstract
In this paper, evaluation of noise reduction performance of HVAC system for ships by means of HVAC mock-up system is presented. Test is done for six different types of HVAC elements including room unit, silencer, etc. It is found that when diameter of silencer is small and air flow is large, flow noise degrades insertion loss. However, as diameter of silencer becomes larger, the effect of flow noise becomes smaller, and insertion loss up to 25 dB is measured. It is observed that insertion loss of diffuser type room unit is usually between zero and 10 dB, whereas that of the nozzle type room unit can be down to - 15 dB. In addition, it is shown that changing duct arrangement can reduce cabin noise by up to 2 dB, and providing same air flow to each room unit is crucial for generating less noise.
Keywords
HVAC; Room Unit; Silencer; Insertion Loss; Mock-Up;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 김봉기, 김상렬, 김현실, 신민철, "선박용 소음기 성능시험 및 평가," 한국소음진동공학회논문집 제18권 제12호, 1237-1242쪽, 2008.   과학기술학회마을
2 KS A ISO 7235, 음향-덕트형 소음기의 삽입손실, 기류소음 및 전압손실 측정방법, 2004.
3 홍진무, 최태묵, 김병희, 조대승, 김동해, "음향파워 평형방법을 이용한 HVAC 시스템 소음예측," 한국소음진동공학회 2001년도 추계학술대회논문집, 1306-1312쪽, 2001.
4 이철원, 김노성, 최수현, "GUI Modeling을 기반으로 한 선박의 HVAC System 소음 해석," 한국소음진동공학회 2001년도 추계학술대회논문집, 1300-1305쪽, 2001.
5 김상렬, 김현실, 김재승, 김봉기, 이성현, "선박용 HVAC 성능평가," 한국음향학회 2010년도 춘계학술대회논문집, 240-243쪽, 2010.
6 DNV, Rules for Ships, Part 5 Chapter 12, Comfort Class, Section 2, 1995.
7 NORSOK Standard S-002 Rev.4, Working environment, Annex A, 2004.
8 National Environmental Balancing Bureau (NEBB), Sound and Vibration Design and Analysis, 1994.
9 R. W. Fisher, C. B. Burroughs and D. L. Nelson, Design Guide for Shipboard Airborne Noise Control, T&R Bulletine 3-37, SNAME, 1983.