Evaluation of Noise Reduction Performance of HVAC System for Ships

선박용 HVAC 시스템의 소음저감성능 평가

  • 김상렬 (한국기계연구원 음향소음팀) ;
  • 김현실 (한국기계연구원 음향소음팀) ;
  • 김재승 (한국기계연구원 음향소음팀) ;
  • 김봉기 (한국기계연구원 음향소음팀) ;
  • 이성현 (한국기계연구원 음향소음팀)
  • Received : 2010.09.07
  • Accepted : 2010.11.23
  • Published : 2010.10.30

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.

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