Open AccessPreparation and Research on Expanded Perlite Composite Phase Change Material
Author(s) -
Liguang Xiao,
Jingwei Wang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1676/1/012020
Subject(s) - eutectic system , materials science , perlite , composite number , phase change , enthalpy , phase (matter) , phase change material , atmospheric temperature range , subcooling , analytical chemistry (journal) , composite material , thermodynamics , chemical engineering , chemistry , microstructure , chromatography , boiling , organic chemistry , physics , engineering
To improve the application of phase change energy storage materials in residential geothermal heating, a composite phase change material with a phase change temperature range of 40°C to 65°C is designed. In this paper, two inorganic hydrated salt phase change materials Na 2 HPO 4 ⋅12H 2 O and CH 3 COONa 3 H 2 O are mixed in different proportions and make eutectic mixture of binary phase change materials, composite phase change material prepared using expanded perlite as carrier. The samples were analyzed by step cooling curve, DSC, SEM, XRD, the results show: the best ratio of Na 2 HPO 4 ⋅12H 2 O to CH 3 COONa⋅3H 2 O is 60:40, it has no phase separation and the subcooling is 3.6°C, its phase transition temperature range is 31.48 °C ~ 72.36 °C, and its phase transition enthalpy is 115.21 J/g. Expanded perlite composite phase change material has no leakage phenomenon, its phase change enthalpy is 109.34 J/g, and the phase change temperature range is 40.84°C ~ 60.52 °C, it meets the application standards of geothermal heating.