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Indoor noise measurements evaluations for HVAC-Unit usinginter-laboratory comparisons

Published online by Cambridge University Press:  10 January 2012

H. S. Seddeq  and
A.A. Medhat A. Fahim
H. S. Seddeq*
Affiliation:
Associate Professor of the Acoustic Laboratories in Building Physics Research Institute at Housing and Building National Research Center, HBRC, P.O. Box 1770, Cairo, Egypt
A.A. Medhat A. Fahim
Affiliation:
Associate Professor, HVAC Consultant in Electro-Mechanical Research Institute at Housing and Building National Research Center, HBRC, P.O. Box 1770, Cairo, Egypt
*
⋆Correspondence:hodasoliman@yahoo.com
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Abstract

The international standard, ISO/IEC 17025 was developed to determine technical competenceand to evaluate laboratories throughout the world. Accreditation bodies playing a vitalrole are increasingly using proficiency testing methodology as a tool to ensure thecredibility of their accreditation programs. The successful completion of a well-designedproficiency test can validate the measurement method and uncertainty budgets of a testinglaboratory. Additionally, proficiency tests can provide a good indication about thequality of the test results. An important part of inter-laboratory comparisons andproficiency testing is the determination of the associated error analyses which arefocused on uncertainty values. This paper presents the implementation of proficiency testsusing inter-laboratory methodology among five different acoustic laboratories. These testswere carried out on 5.27 KWCooling standard unitary air conditioner, A/C, suchas through-wall or split room standard A/C units, for the assessment of Housing &Building National Centre acoustic laboratory. Analyses of results show a good agreementfor En-Value among the selected laboratorieswhen compared with the lowest uncertainty as stated by proficiency tests standards.

Keywords

Indoor sound measurementsnoise level in dBAair-conditioning unitary unitproficiency testingUncertaintyISO/IEC 17025ASTM 1574
Type
Research Article
Information
International Journal of Metrology and Quality Engineering , Volume 2 , Issue 2 , 2011 , pp. 75 - 81
Copyright
© EDP Sciences 2012

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References

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