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New Data from American University Illuminate Findings in Phase Change Materials (Improved thermal performance of face mask using phase change...

July 15, 2014

New Data from American University Illuminate Findings in Phase Change Materials (Improved thermal performance of face mask using phase change material)

By a News Reporter-Staff News Editor at Journal of Mathematics -- Investigators publish new report on Phase Change Materials. According to news reporting out of Beirut, Lebanon, by VerticalNews editors, research stated, "The purpose of this work is to develop a mathematical model to study the thermal performance of a cloth face mask in which phase change material (PCM) is encapsulated as compared to a cloth mask alone. The thermal performance is assessed by the ability to reduce heat loss and water vapor transfer from the exhaled air to inhaled air as well as to reduce the potential for condensation in the mask fabric layers."

Our news journalists obtained a quote from the research from American University, "The mathematical model incorporated all the complex transport mechanisms of heat and moisture, including the realistic breathing pattern for the air passing through the fabric. The core assumption of the model of non-local-thermo-equilibrium was validated by performing experiments on a common cotton cloth mask. The model predicted well the experimentally measured air temperature through a cotton cloth mask during sudden changes in thermal inflow conditions. The validated model was used to perform a parametric study to determine environmental conditions and PCM material characteristics for the enhanced performance of the cloth mask. It was found that a considerable increase in the reclaiming of sensible and latent energy was reached for the same ambient conditions by the introduction of PCM with melting temperature of 22? and PCM mass fraction of 20%. Furthermore, the incorporation of PCM allows inhalation of colder outdoor conditions with a high range of relative humidity without condensation at ambient temperatures lower than 12?, which is not possible without PCM."

According to the news editors, the research concluded: "For higher temperatures than 12?, the introduction of PCM enlarged the possible range of relative humidity reached without condensation."

For more information on this research see: Improved thermal performance of face mask using phase change material. Textile Research Journal, 2014;84(8):854-870. Textile Research Journal can be contacted at: Sage Publications Ltd, 1 Olivers Yard, 55 City Road, London EC1Y 1SP, England. (Sage Publications -; Textile Research Journal -

Our news journalists report that additional information may be obtained by contacting C. Habchi, American University of Beirut, Dept. of Mech Engn, Beirut 11072020, Lebanon. Additional authors for this research include K. Ghali and N. Ghaddar.

Keywords for this news article include: Asia, Beirut, Lebanon, Mathematics, Nanotechnology, Emerging Technologies

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Source: Journal of Mathematics

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