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Preparation and characterization of composite hydrate salt PCM of industrial grade disodium hydrogen phosphate with sodium carbonate
Author(s) -
Zheng Maosheng,
Peng Xiaojian,
Liu Jia,
Zhang Shuai,
Zhang Xiao
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6299
Subject(s) - supercooling , composite number , hydrate , materials science , chemical engineering , exothermic reaction , sodium carbonate , thermal energy storage , crystallization , phase change material , renewable energy , chemistry , composite material , thermodynamics , thermal , sodium , organic chemistry , metallurgy , physics , engineering , electrical engineering
Summary Phase‐change materials (PCMs) can be used to restore abundant heat energy and release thermal energy when it is needed, thus a continuous supply of thermal energy from renewable energy resource such as solar energy is expected to be provided. In this article, industrial grade Na 2 HPO 4 ·12H 2 O is used to prepare composite PCM with Na 2 CO 3 ·10H 2 O so as to improve its performance in phase transition. It is shown that an appropriate composite material that composes of 90% industrial grade Na 2 HPO 4 ·12H 2 O and 10% analytical pure Na 2 CO 3 ·10H 2 O is with the lowest degree of supercooling (6.0°C), the longest exothermic plateau duration (10.6 minutes), and the melting solution is clear without phase separation. Furthermore, by adding 2.25% Na 2 SiO 3 ·9H 2 O to above composite PCM, a more promised composite material is obtained, which is with the crystallization temperature of 28.4°C, the lower supercooling degree of 2.5°C, and heat release plateau of 10.2 minutes during cooling, it has a good cyclic stability of heating‐cooling.