A simulation approach to determine the insertion and transmission losses of unlined and lined ducts

K. Ruan, D. W. Herrin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

One of the primary noise transmission paths in buildings is from HVAC equipment through ventilation ducts. ASHRAE Handbook - HVAC Applications provides tables for estimating the attenuation of lined and unlined ducts up to 10 ft (3.05 m) in length. The aim of this research is to suggest and validate a finite element approach which can be used to determine the attenuation of ducts of any length and dimension. The approach detailed simulates the standard measurement approaches for assessing duct attenuation. The duct air space, including the source and termination, is modeled using acoustic finite elements. Poroelastic finite elements are used to simulate the fiber lining, and the metal ductwork is modeled using structural finite elements. The model is used to determine the insertion and transmission losses of unlined and lined ducts. Predicted results are compared to measurements with good agreement.

Original languageEnglish
Title of host publicationASHRAE Transactions
Pages3-11
Number of pages9
ISBN (Electronic)9781939200259
StatePublished - 2016
Event2016 ASHRAE Winter Conference - Orlando, United States
Duration: Jan 23 2016Jan 27 2016

Publication series

NameASHRAE Transactions
Volume122
ISSN (Print)0001-2505

Conference

Conference2016 ASHRAE Winter Conference
Country/TerritoryUnited States
CityOrlando
Period1/23/161/27/16

Bibliographical note

Publisher Copyright:
© 2016 ASHRAE.

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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