Heat protection by different phase change materials

Different types of phase change materials (PCMs) were compared for the use in heat protective clothing. For that purpose, flexible blister foils containing the PCMs were prepared. The samples were irradiated with a heat flux of 1.5 kW/m2 in order to simulate a typical industrial setting like working...

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Bibliographic Details
Published in:Applied thermal engineering 2013-05, Vol.54 (2), p.359-364
Main Authors: Bühler, M., Popa, A.M., Scherer, L.J., Lehmeier, F.K.S., Rossi, R.M.
Format: Article
Language:English
Subjects:
Applied sciences
Cooling
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Foils
Heat protection
Heat transfer
Irradiation
Mathematical models
Ovens
PCM
Phase change material
Phase change materials
Protective clothing
Specific heat
Theoretical studies. Data and constants. Metering
Thermal engineering
Transport and storage of energy
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Summary:Different types of phase change materials (PCMs) were compared for the use in heat protective clothing. For that purpose, flexible blister foils containing the PCMs were prepared. The samples were irradiated with a heat flux of 1.5 kW/m2 in order to simulate a typical industrial setting like working in front of a hot oven. The temperature evolution behind the foils indicated the performance of each PCM, which was dependent on the duration of the exposure. For irradiation times up to 9 min, sodium acetate trihydrate lead to the lowest temperature increase and thus the best protection. When irradiating more than 9 min, a zeolite type was found to be more suitable, which lead to a lower temperature increase of up to 36 °C compared to a reference with no PCM. We developed a simple heat transfer model, taking account of the latent heat of the PCM, of the heat capacity of the foil and of the radiant and natural convective heat flow, which could be applied to predict the effect of PCM containing foils and will be used for further optimizations. ► Comparison of different flame resistant PCMs for heat protection in textiles. ► Prediction of the heat protection of PCMs which have a net phase change temperature. ► Inorganic PCMs were shown to be highly effective for heat protection.
ISSN:1359-4311
DOI:10.1016/j.applthermaleng.2013.02.025