Analysis on the Improvement of Thermal Performance of Phase Change Material Ba (OH)<sub>2</sub>·8H<sub>2</sub>O
Benefitting from the characteristics of a high latent heat capacity and stable phase change behavior, phase change materials have widely received concerns in the field of thermodynamic management. Ba(OH)<sub>2</sub>·8H<sub>2</sub>O is an ideal phase change material (PCM) in t...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/561fc0833e5e43018ccf1ac474aa8b23 |
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| Sumario: | Benefitting from the characteristics of a high latent heat capacity and stable phase change behavior, phase change materials have widely received concerns in the field of thermodynamic management. Ba(OH)<sub>2</sub>·8H<sub>2</sub>O is an ideal phase change material (PCM) in the mid-to-low temperature range, but its large-scale application is still limited by severe supercooling during the nucleation process. In this paper, the experimental analysis and comparison are performed via an Edisonian approach, where Ba(OH)<sub>2</sub>·8H<sub>2</sub>O is adopted as an original substrate; BaCO<sub>3</sub>, CaCl<sub>2</sub>, NaCl, KH<sub>2</sub>PO<sub>4</sub>, and NaOH are selected as nucleating agents; and graphite is used as a heat-conducting agent. The results show that Ba(OH)<sub>2</sub>·8H<sub>2</sub>O containing 1.2% BaCO<sub>3</sub> and 0.2% graphite powder has the best performance. Compared with pure Ba(OH)<sub>2</sub>·8H<sub>2</sub>O, the supercooling degree is reduced to less than 1 °C, the phase change latent heat duration is extended, and the thermal conductivity is significantly improved. Therefore, this study not only provides a reference for the application of Ba(OH)<sub>2</sub>·8H<sub>2</sub>O, but can also be used as a guidance for other material modifications. |
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