Enhancing building roof insulation: A comparative examination of PCM
\nlayers integrated with and without nanoparticles
\nHayder M. Abbas a,* , Abd Alsatar Hussein b<\/p>\n
A B S T R A C T
\nThis paper evaluates the thermal insulation potential of a roof embedded with phase-change materials (PCM) and
\nnano-enhanced PCM (NEPCM) in Iraq\u2019s hot climate. The primary goal is to investigate the effectiveness of these
\nmaterials in reducing indoor heat transfer, thereby enhancing energy efficiency, using a numerical model based
\non finite volume and enthalpy methods in a three-dimensional spatial domain. The study compares the performance
\nof roofs equipped with pure PCM and NEPCM layers. Results indicate that the PCM layer significantly
\nlowers peak indoor surface temperatures and delays peak heat transfer, achieving a 2.4 \u25e6C temperature reduction
\nwith pure PCM and a 1.1 \u25e6C reduction with NEPCM. Furthermore, using pure PCM extends the time delay of peak
\nload by 2 h, while NEPCM reduces it to 0.5 h, and the increasing nanoparticle ratio in PCM leads to an increase in
\nthe inner surface temperature of the roof. Findings also suggest optimizing the PCM layer\u2019s thickness and
\nadjusting its melting temperature to around 37 \u25e6C enhance its thermal insulation capabilities.<\/p>\n
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