Tuesday, January 26, 2016: 9:45 AM-11:00 AM
Systems and Equipment
Chair:
Reinhard Radermacher, Ph.D., University of Maryland
Sponsor: Publishing and Education Council
This session offers presentations based on a select group of recently published papers from the ASHRAE journal, "Science and Technology in the Built Environment," regarding new research in UV-photocatalytic oxidation, and emissions from ozone reactions with human-worn clothing.
1 Evaluation of UV-Photocatalytic Oxidation of Light Alcohols at Sub-PPM Concentrations
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Fariborz Haghighat, Ph.D., P.E., Concordia University |
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Alireza Aghighi, Concordia University |
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Lexuan Zhong, Ph.D., Concordia University
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Chang-Seo Lee, Ph.D., Concordia University |
This article reports the outcome of an experimental study on the evaluation of photocatalytic oxidation reactions of light alcoholic volatile organic compounds with nano TiO2 catalysts at different indoor air conditions. The removal efficiencies of tested individual volatile organic compounds and their by-products were compared at three different parts per billion-level challenge concentrations. Acetaldehyde and formaldehyde were identified as primary by-products, and no significant catalyst deactivation was found during the experiment. The reaction pathways and the selectivity of the reactions were investigated at different relative humidity levels.
2 Numerical Modeling of VOC Emissions from Ozone Reactions with Human-Worn Clothing in an Aircraft Cabin
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Qingyan Chen, Ph.D., Purdue University |
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Aakash Chand Rai, Ph.D., Purdue University |
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Chao-Hsin Lin, Ph.D., Boeing |
Volatile organic compounds (VOCs) are indoor air pollutants with many adverse health effects for humans. Ozone reactions with human surfaces are an important source of VOCs in aircraft cabins. This investigation developed empirical models for computing the emissions of several major VOCs from ozone reactions with human-worn clothing. The empirical models were used to compute the contributions of human surfaces to these VOCs in an aircraft cabin mockup under different environmental conditions after they were compared with the corresponding experimental data. The models can determine ozone-initiated VOC concentrations in the breathing zones of the passengers.