On the power-law model for predicting the VOC emissions from office workstation systems

J. S. Zhang, H. Li, Z. Zhang, H. M. Salonvaara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

This paper examines the validity of using the power-law model (i.e., E = a t-b, where, E is the emission factor in ug/h per workstation; t is time in h, and a, b are empirical coefficients determined from chamber test data) to predict the emission rate at 14th day based on 7 days (or less) of emission test data. Theoretical analysis and experimental results from full-scale chamber tests of typical workstation systems are used for the investigation. Experimental results show that the power-law model represented within the experimental error the emission factors of the tested products over the 72h to 336 h period for compounds that had significant decay in emission factor, but not for compounds whose change of emission factor over time was within the experimental uncertainty. Predictions of the emission factors at 14th day based on the 72nd and 168th data points using the power-law model ranged from 5 to 55% (with majority within 30%) of the measured values except for cases with very slow or negative decay rates (b<0.20) or low chamber concentrations that approached the lower limit of quantification (LOQ). Specific recommendations are made on the use of the power-law model to simplify the testing procedure and predict the emissions at 14th day based on 7 day testing.

Original languageEnglish (US)
Title of host publicationProceedings of the A and WMA Indoor Environmental Quality
Subtitle of host publicationProblems, Research and Solutions Conference 2006
Pages453-473
Number of pages21
StatePublished - Dec 1 2006
EventA and WMA Indoor Environmental Quality: Problems, Research and Solutions Conference 2006 - Durham, NC, United States
Duration: Jul 17 2006Jul 19 2006

Publication series

NameProceedings of the A and WMA Indoor Environmental Quality: Problems, Research and Solutions Conference 2006
Volume1

Other

OtherA and WMA Indoor Environmental Quality: Problems, Research and Solutions Conference 2006
CountryUnited States
CityDurham, NC
Period7/17/067/19/06

Keywords

  • Full-scale environmnetal chamber testing
  • Material emissions
  • Volatile Organic Compounds (VOCs)
  • Workstation systems

ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Science(all)

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  • Cite this

    Zhang, J. S., Li, H., Zhang, Z., & Salonvaara, H. M. (2006). On the power-law model for predicting the VOC emissions from office workstation systems. In Proceedings of the A and WMA Indoor Environmental Quality: Problems, Research and Solutions Conference 2006 (pp. 453-473). (Proceedings of the A and WMA Indoor Environmental Quality: Problems, Research and Solutions Conference 2006; Vol. 1).