UVC output dependence of low pressure mercury vapor lamps in parallel and cross flow on air temperature and velocity

Josephine Lau, William Bahnfleth, James Freihaut

Research output: Contribution to conferencePaperpeer-review

Abstract

The output of low pressure mercury vapor lamps used in ultraviolet germicidal irradiation (UVGI) applications depends strongly on the lamp surface cold spot temperature. The objective of this study is to develop a model to predict the output variation of these lamps in flow conditions typical of ventilation systems. Experiments were performed to account for the variability of the lamp cold spot temperature and output for three lamp types and two orientations. The cold spot temperature of lamps was lower in cross flow than in parallel flow under the same ambient conditions. Lamps in cross flow had output reductions of up to 70% compared to 50% for parallel flow. A calibrated semi-empirical model was predicted the lamp output well over a wide range of flow conditions with relative error of less than 8.5%.

Original languageEnglish (US)
StatePublished - 2009
Externally publishedYes
Event9th International Healthy Buildings Conference and Exhibition, HB 2009 - Syracuse, NY, United States
Duration: Sep 13 2009Sep 17 2009

Other

Other9th International Healthy Buildings Conference and Exhibition, HB 2009
CountryUnited States
CitySyracuse, NY
Period9/13/099/17/09

Keywords

  • Bioaerosol control
  • Indoor air quality
  • UVC lamp performance
  • UVGI
  • Ultraviolet germicidal irradiation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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