Influence of PCMs in thermal insulation on thermal behaviour of building envelopes

Kamil Dydek , Piotr Furmański , Piotr Łapka

Abstract

A model of heat transfer through a wall consisting of a layer of concrete and PCM enhanced thermal insulation is considered. The model accounts for heat conduction in both layers, thermal radiation and heat absorption/release due to phase change in the insulation as well as time variation in the ambient temperature and insolation. Local thermal equilibrium between encapsulated PCM and light-weight thermal insulation was assumed. Radiation emission, absorption and scattering were also accounted for in the model. Comparison of different cases of heat flow through the building envelope was carried out. These cases included presence or absence of PCM and thermal radiation in the insulation, effect of emissivity of the PCM microcapsules as well as an effect of solar radiation or its lack on the ambient side of the envelope. Two ways of the PCM distribution in thermal insulation were also considered. The results of simulations were presented for conditions corresponding to the mean summer and winter seasons in Warsaw. It was found that thermal radiation plays an important role in heat transfer through thermal insulation layer of the wall while the presence of the PCM in it significantly contributes to damping of temperature fluctuations and a decrease in heat fluxes flowing into or lost by the interior of the building. The similar effect was observed for a decrease in emissivity of the microcapsules containing PCM.
Author Kamil Dydek ZMCP
Kamil Dydek,,
- Division of Ceramic Materials and Polymers
, Piotr Furmański ITC
Piotr Furmański,,
- The Institute of Heat Engineering
, Piotr Łapka ITC
Piotr Łapka,,
- The Institute of Heat Engineering
Journal seriesJournal of Physics - Conference Series, ISSN 1742-6588 [1742-6596]
Issue year2016
No745
Pages1-10
Publication size in sheets0.5
Conference7th European Thermal-Sciences Conference, 19-07-2016 - 23-10-2016, Polska
Keywords in EnglishPhase change materials, Thermal insulation, ANSYS Fluent
Languageen angielski
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Dydek_2016_J._Phys.%3A_Conf._Ser._745_032138.pdf 1.01 MB
Score (nominal)5
ScoreMinisterial score [Punktacja MNiSW] = 0.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) [Punktacja MNiSW (2013-2016)] = 5.0, 28-11-2017, ArticleFromJournal - czasopismo zagraniczne spoza list
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