Measurement and Modeling of IAQ Dynamics in the Air Above Swimming Pools

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Presenter: Ernest "Chip" Blatchley, Ph.D., P.E., BCEE, F.ASCE

Part 1: Thursday, October 13, 10:15 a.m. - 11:15 a.m.
Part 2: Friday, October 14 11:00 a.m. - 12:00 p.m.
1 Hour | 1 PHTA CEU | 0.1 IACET CEU



CMAHC funding has been used to support the first two phases of a study to examine indoor air quality (IAQ) dynamics in indoor pool facilities and to develop a model to simulate this behavior. The results of IAQ monitoring will be presented along with data to illustrate the factors that affect IAQ dynamics. A model will be presented that allows simulation of these factors. The model also allows examination of the effects of engineering and operational measures that could be implemented to improve IAQ. The consequences of these measures will also be discussed. The work to date has focused on swimming venues in the upper Midwest of the US. If funded, Phase 3 of this study will expand the investigation to areas with different climate conditions, as well as different swimming pool use types.

For the second part of this presentation, the focus will be on defining the physical and chemical phenomena that govern the (net) rates of transfer of volatile compounds from water to air in indoor swimming pool facilities. These factors will be translated to a mathematical model that is used to quantify the rates of volatile compound transfer from water to air. In turn, this information is incorporated into a mathematical model to describe the dynamics of IAQ in indoor swimming pool facilities. Example applications of the model will be presented to illustrate the benefits of this modeling tool to those who design and operate pools. Benefits and limitations of the model will be presented. The parameters that are needed to operate the model are likely to demonstrate variability based on the type of application and possibly based on the facility location. Plans for Phase 3 of this investigation are to expand the range of facility types and locations to allow for expansion of the database of input parameter values that will be needed to allow general application of this model. 


Learning Objectives

  • Examine physical and chemical phenomena that govern transfer of volatile compounds from water to air.
  • Discuss operational characteristics of indoor pool facilities that influence indoor air quality.
  • Review engineering and operational measures that can be implemented to improve indoor air quality.


Presenter Bio

Ernest R. Blatchley III is the Lee A. Rieth Professor in Environmental Engineering at Purdue University, where he holds a joint faculty appointment in the Lyles School of Civil Engineering and the Division of Environmental & Ecological Engineering. The Blatchley Group has been active in research related to swimming pool chemistry for roughly 15 years, with a recent focus on volatile compounds in water and their effects on IAQ in indoor pool facilities.

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