Analysis on the Improvement of Thermal Performance of Phase Change Material Ba (OH)2·8H2O
| Autor: | Xiaoxue Luo, Changzhen Zou, Shibo Cao, Xiaohui Lu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Materials science Renewable Energy Sustainability and the Environment phase change nucleation Nucleation Analytical chemistry Energy Engineering and Power Technology Ba(OH)2·8H2O supercooling latent heat Atmospheric temperature range Phase-change material Degree (temperature) Thermal conductivity Latent heat Graphite Electrical and Electronic Engineering Supercooling Engineering (miscellaneous) Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 7761, p 7761 (2021) Energies; Volume 14; Issue 22; Pages: 7761 |
| ISSN: | 1996-1073 |
| Popis: | 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)2·8H2O 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)2·8H2O is adopted as an original substrate; BaCO3, CaCl2, NaCl, KH2PO4, and NaOH are selected as nucleating agents; and graphite is used as a heat-conducting agent. The results show that Ba(OH)2·8H2O containing 1.2% BaCO3 and 0.2% graphite powder has the best performance. Compared with pure Ba(OH)2·8H2O, 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)2·8H2O, but can also be used as a guidance for other material modifications. |
| Databáze: | OpenAIRE |
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