Abstract
Phase change materials (PCMs) have been identified as potential candidates for building energy optimization by increasing the thermal mass of buildings. The increased thermal mass results in a drop in the cooling/heating loads, thus decreasing the energy demand in buildings. However, direct incorporation of PCMs into building elements undermines their structural performance, thereby posing a challenge for building integrity. In order to retain/improve building structural performance, as well as improving energy performance, micro-encapsulated PCMs are integrated into building materials. The integration of microencapsulation PCMs into building materials solves the PCM leakage problem and assures a good bond with building materials to achieve better structural performance. The aim of this article is to identify the optimum micro-encapsulation methods and materials for improving the energy, structural and safety performance of buildings. The article reviews the characteristics of micro-encapsulated PCMs relevant to building integration, focusing on safety rating, structural implications, and energy performance. The article uncovers the optimum combinations of the shell (encapsulant) and core (PCM) materials along with encapsulation methods by evaluating their merits and demerits.
Highlights
IntroductionPhase change considered to to be be potential energy saving materials since,since, due changematerials materials(PCMs)(PCMs)are are considered potential energy saving materials to latent heatheat absorption, theythey can can substantially increase the the thermal mass of buildings compared to due to latent absorption, substantially increase thermal mass of buildings compared conventional building materials presented in in Figure 1 [1].to conventional building materials presented Figure 1.maximum energy storage capacity of 10 mm thickness of different building 1
An inorganic high conductivity is formed is around thearound capsule is the disadvantage for building shell thermal with high thermal conductivity formed thewhich capsule which is the disadvantage for applications schematic diagram of the encapsulation of
The method was improved with slight modifications, resulting in better microencapsulation efficiency (86.5%) and a better encapsulation ratio (86%), thermal instability was observed at elevated temperatures
Summary
Phase change considered to to be be potential energy saving materials since,since, due changematerials materials(PCMs).
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