Organic paraffinic PCMs called Micronals DS 5038X in powder
form (from BASF) are considered in this study. They are composed of a
mixture of paraffin waxes with a melting point of 25 1C and a phase
change enthalpy of 100 kJ/kg according to the manufacturer. The
paraffin is microencapsulated in a plastic layer of polymethyl methacrylate
(PMMA). The microencapsulation technique is used to facilitate
the incorporation of the phase change material into the construction
material and to prevent the paraffin leakage during the PCMs melting