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Fabrication and thermal characterization of kaolin-based composite phase change materials for latent heat storage in buildings
Graphical abstract In this study, the surface morphology, compatibility, maximum PCM ratio, phase change-energy storage properties, thermal endurance, thermal conductivity and heat storage performances of the prepared kaolin (K)-based building composite phase change materials (Kb-CPCMs) were investigated by using microscopy, spectroscopy, calorimetry and thermal methods. The Kb-CPCMs, including capric acid, PEG600, and heptadecane have a melting temperature of 30.71°C, 5.16°C and 22.08°C and a latent heat of 27.23, 32.80 and 34.63J/g, respectively. The thermal reliability of the Kb-CPCMs slightly changed after 1000 heating-cooling cycling. The heat storage rates of Kb-CPCMs were considerably increased by addition of EG (5wt%). All the prepared Kb-CPCMs have good thermal energy storage (TES) function for HVAC applications in building envelopes because of their good thermal energy storage properties, reusability performance and enhanced thermal conductivity.
Highlights K/CA, K/PEG600, and K/HD composites were fabricated as Kb-CPCMs. The Kb-CPCMs have melting temperature and latent heat in the range of about of 5–31°C and 27–35J/g, respectively. The Kb-CPCMs had good thermal reliability after 1000 heating-cooling cycles. The heat storage rates of Kb-CPCMs were considerably increased with EG (5wt%) addition.
Abstract Three kinds of kaolin-based composite phase change materials (Kb-CPCMs) including capric acid (CA), PEG600, and heptadecane (HD) as organic PCMs were fabricated using vacuum impregnation method for latent heat storage (LHS) application in buildings. The surface morphology, compatibility, maximum ratio for impregnated PCM, LHS properties, thermal endurance, thermal conductivity and its effect on the melting times of prepared Kb-CPCMs were investigated by using microscopy, spectroscopy, calorimetry and thermal methods. The seepage test indicated that CA, PEG600 and HD were impregnated maximally into the kaolin as 17.5, 21 and 16.5wt%, respectively. The fabricated three composites, K/CA, K/PEG600, and K/HD, have a phase change temperature of 30.71, 5.16 and 22.08°C and a latent heat of 27.23, 32.80 and 34.63J/g, respectively. The thermal cycling test exposed that the thermal reliability of the Kb-CPCMs slightly changed after repeated 1000 heating-cooling cycling. The heat storage rates of the Kb-CPCMs were increased considerably by adding expanded graphite (EG) in mass faction of 5%. All the prepared Kb-CPCMs have good thermal energy storage (TES) function for heating, ventilating and air conditioning (HVAC) in building envelopes because of their suitable LHS properties, high reusability performance and enhanced thermal conductivity.
Fabrication and thermal characterization of kaolin-based composite phase change materials for latent heat storage in buildings
Graphical abstract In this study, the surface morphology, compatibility, maximum PCM ratio, phase change-energy storage properties, thermal endurance, thermal conductivity and heat storage performances of the prepared kaolin (K)-based building composite phase change materials (Kb-CPCMs) were investigated by using microscopy, spectroscopy, calorimetry and thermal methods. The Kb-CPCMs, including capric acid, PEG600, and heptadecane have a melting temperature of 30.71°C, 5.16°C and 22.08°C and a latent heat of 27.23, 32.80 and 34.63J/g, respectively. The thermal reliability of the Kb-CPCMs slightly changed after 1000 heating-cooling cycling. The heat storage rates of Kb-CPCMs were considerably increased by addition of EG (5wt%). All the prepared Kb-CPCMs have good thermal energy storage (TES) function for HVAC applications in building envelopes because of their good thermal energy storage properties, reusability performance and enhanced thermal conductivity.
Highlights K/CA, K/PEG600, and K/HD composites were fabricated as Kb-CPCMs. The Kb-CPCMs have melting temperature and latent heat in the range of about of 5–31°C and 27–35J/g, respectively. The Kb-CPCMs had good thermal reliability after 1000 heating-cooling cycles. The heat storage rates of Kb-CPCMs were considerably increased with EG (5wt%) addition.
Abstract Three kinds of kaolin-based composite phase change materials (Kb-CPCMs) including capric acid (CA), PEG600, and heptadecane (HD) as organic PCMs were fabricated using vacuum impregnation method for latent heat storage (LHS) application in buildings. The surface morphology, compatibility, maximum ratio for impregnated PCM, LHS properties, thermal endurance, thermal conductivity and its effect on the melting times of prepared Kb-CPCMs were investigated by using microscopy, spectroscopy, calorimetry and thermal methods. The seepage test indicated that CA, PEG600 and HD were impregnated maximally into the kaolin as 17.5, 21 and 16.5wt%, respectively. The fabricated three composites, K/CA, K/PEG600, and K/HD, have a phase change temperature of 30.71, 5.16 and 22.08°C and a latent heat of 27.23, 32.80 and 34.63J/g, respectively. The thermal cycling test exposed that the thermal reliability of the Kb-CPCMs slightly changed after repeated 1000 heating-cooling cycling. The heat storage rates of the Kb-CPCMs were increased considerably by adding expanded graphite (EG) in mass faction of 5%. All the prepared Kb-CPCMs have good thermal energy storage (TES) function for heating, ventilating and air conditioning (HVAC) in building envelopes because of their suitable LHS properties, high reusability performance and enhanced thermal conductivity.
Fabrication and thermal characterization of kaolin-based composite phase change materials for latent heat storage in buildings
Sarı, Ahmet (author)
Energy and Buildings ; 96 ; 193-200
2015-03-11
8 pages
Article (Journal)
Electronic Resource
English
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