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Effect of inner coatings on the stability of chloride-based phase change materials encapsulated in geopolymers
- Source :
- Solar Energy Materials and Solar Cells. 174:271-276
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- In the current study pre-formed geopolymer half shells were fabricated from a combination of fly ash and black slag. Five (5) geopolymer shells were filled with a chloride-based phase change material (PCM) with a melting point of 540 °C for use in a high temperature thermal energy storage system (TESS). Additionally, three (3) of these shells contained an inner coating of alumina (various manufacturers) while another geopolymer shell was pre-fired at 610 °C. The half shells were cycled around the melting point of the PCM (500–580 °C) for five (5) cycles, with the mass change of the samples recorded. Of the five (5) samples only the Aremco-coated sample suffered less PCM loss than the control. Furthermore, the melting point and latent heat of PCM samples from the geopolymer half shells were measured by differential scanning calorimetry (DSC) to find if degradation occurs. In all samples the PCM melting point was not affected while the latent heat was significantly affected. Additionally, the Aremco-coated sample resulted in PCM segregation. Refereed/Peer-reviewed
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Geopolymers
020209 energy
02 engineering and technology
engineering.material
Chloride
Phase-change material
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Geopolymer
Differential scanning calorimetry
Coating
Latent heat
Fly ash
Encapsulated phase change materials
0202 electrical engineering, electronic engineering, information engineering
medicine
engineering
Melting point
Composite material
High temperature thermal energy storage
medicine.drug
Subjects
Details
- ISSN :
- 09270248
- Volume :
- 174
- Database :
- OpenAIRE
- Journal :
- Solar Energy Materials and Solar Cells
- Accession number :
- edsair.doi.dedup.....929eed3c1eaf25942a7cbaa7c90bfd3f