- Title
- Development of novel form-stable phase change material (PCM) composite using recycled expanded glass for thermal energy storage in cementitious composite
- Creator
- Yousefi, Ali; Tang, Waiching; Khavarian, Mehrnoush; Fang, Cheng
- Relation
- Renewable Energy Vol. 175, Issue September 2021, p. 14-28
- Publisher Link
- http://dx.doi.org/10.1016/j.renene.2021.04.123
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- In the last decade, latent heat storage materials such as phase change materials (PCMs) have been increasingly seen as a promising solution in thermal energy storage (TES) systems to reduce heating and cooling energy demand in buildings. However, there are still some significant challenges to integrate PCM into building components. The main challenges are the difficulty of selecting appropriate PCM carriers which are not only compatible with building materials but also have a high absorption capacity while preventing the leakage of PCM. In this study, recycled expanded glass aggregate (EGA) was innovatively used as a PCM carrier to fabricate form-stable PCM composite. A high absorption ratio of 80% was measured for the EGA, and the leakage results from the diffusion-oozing circle test confirmed the stability of the EGA-PCM composite. The differential scanning calorimetry (DSC) analysis showed that the phase transition properties of the composite were slightly shifted, and its enthalpy decreased compared to the pure PCM. The thermogravimetric analysis (TGA) results showed that the composite exhibited good thermal stability. In addition, the thermal performance measurements demonstrated that using EGA-PCM composite can significantly reduce the heat transfer rate of the cement mortar up to 47%. Moreover, the microstructure studies revealed successful impregnation of PCM into the EGA and good interfacial bonding between the EGA-PCM composite and the cement matrix. Besides, a cost-benefit analysis of a case study building showed that although the costs of production and initial installation of EGA-PCM composite are relatively high, it is more beneficial in terms of economic and environmental consideration in the long run. The results revealed the feasibility of utilising EGA as a novel PCM carrier and the promising thermal performance of EGA-PCM cement mortar.
- Subject
- recycled expanded glass aggregate; pcm; thermal energy storage; cementitious composites
- Identifier
- http://hdl.handle.net/1959.13/1445071
- Identifier
- uon:42490
- Identifier
- ISSN:0960-1481
- Language
- eng
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