THERMAL SCIENCE

International Scientific Journal

Yichao Zhang

,

Ying Wang

,

Jinghai Zhou

,

Jian Huang

,

Xiaoxin Wu

,

Zhaoyang Ding

,

Qinghe Wang

PREPARATION AND CHARACTERIZATION OF PHASE CHANGE ENERGY STORAGE GYPSUM

ABSTRACT
The thermophysical properties of binary phase change materials with different ratios of capric acid and palmitic acid were studied by step cooling curve method and differential scanning calorimetry in this paper. Furthermore, the best adsorption materials and coating materials were selected by testing their mass adsorption rate and mass loss rate. Finally, the specific heat capacity, thermal conductivity coefficient, and compressive strength of phase change energy storage gypsum was determined, respectively, and the energy-saving effect of the phase change energy storage gypsum in the wall is evaluated. The results show that the binary phase change materials can form a eutectic system. When the mass ratio of capric acid to palmitic acid is 7:3, the low eutectic point of the binary system is formed, and the crystallization temperature of system is 26°C. The adsorption capacity of expanded perlite is much larger than that of ceramsite, and the mass loss rate of the material coated by styrene acrylic emulsion is lower than that of ethylene vinyl acetate. The specific heat capacity of phase change energy storage gypsum is about twice that of ordinary gypsum. With the addition of phase change materials, the thermal conductivity coefficient of phase change energy storage gypsum decreases gradually, and the compressive strength of phase change energy storage gypsum decreases gradually at the same time. Compared with ordinary gypsum, phase change energy storage gypsum has better energy-saving performance.
KEYWORDS
binary phase change materials, differential scanning calorimetry, thermal conductivity coefficient, compressive strength
PAPER SUBMITTED: 2020-01-24
PAPER REVISED: 2020-07-08
PAPER ACCEPTED: 2020-07-12
PUBLISHED ONLINE: 2020-08-08
DOI REFERENCE: https://doi.org/10.2298/TSCI200124217Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4737 - 4748]
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Preparation and characterization of phase change energy storage gypsum

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence