Occupant UV Exposure Measurements for Upper-Room Ultraviolet Germicidal Irradiation

Milonova, Sonya; Rudnick, Stephen; McDevitt, James; Nardell, Edward

doi:10.1016/j.jphotobiol.2016.03.009

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Occupant UV Exposure Measurements for Upper-Room Ultraviolet Germicidal Irradiation

Published Date:

Mar 11 2016

Publisher's site:

http://dx.doi.org/10.1016/j.jphotobiol.2016.03.009 New Site Icon

Source:

J Photochem Photobiol B. 159:88-92.

[PDF - 224.56 KB]

Details:

Personal Authors:

Milonova, Sonya ; Rudnick, Stephen ; McDevitt, James ; Nardell, Edward ;

Keywords:

[+]

Pubmed ID:

27038734

Pubmed Central ID:

PMC4854786

Description:

The threshold limit value (TLV) guideline for ultraviolet (UV) radiation specifies that irradiance measurements to ensure occupant safety be taken over an angle of 80° at the sensor. The purpose of this study was to evaluate the effect of an 80° field of view (FOV) tube on lower room UV-C irradiation measurements. Measurements were made in an experimental chamber at a height of 1.73m with and without an FOV tube. The FOV tube reduced the lower room irradiance readings by 18-34%, a statistically significant reduction compared to the bare sensor. An 80° FOV tube should be used for lower room irradiance measurements to comply with the TLV guideline. The resulting lower readings would allow more UV-C radiation in the upper room without compromising occupant safety. More UV-C radiation in the upper room could increase efficacy of UVGI systems for reducing transmission of airborne infectious diseases. In addition, recommendations are made to standardize lower room irradiance measurement techniques.

Document Type:

Journal Article

Collection(s):

CDC Public Access

Funding:

D43 TW009379/TW/FIC NIH HHS/United States
R01 OH009050/OH/NIOSH CDC HHS/United States

Supporting Files:

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