4.7 Article

Supercooling regulation and thermal property optimization of erythritol as phase change material for thermal energy storage

期刊

JOURNAL OF ENERGY STORAGE
卷 52, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.est.2022.105000

关键词

Phase change material; Thermal energy storage; Supercooling; Thermal conductivity enhancement

资金

  1. National Natural Science Foundation of China [51806238]
  2. Natural Science Foundation of Jiangsu Province [BK20180649]

向作者/读者索取更多资源

This study introduces the use of CMC-Na and h-BN to regulate the supercooling and thermal properties of erythritol. The results show that CMC-Na and h-BN can effectively promote the crystal growth and nucleation process of erythritol, improving its thermal energy storage stability.
Erythritol has many advantages such as high latent heat, good stability, non-toxicity and abundance, which are extremely potential in the field of medium-temperature thermal energy storage. However, the application of erythritol in thermal energy storage is greatly restricts by high supercooling. Herein, sodium carboxymethyl cellulose (CMC-Na) and hexagonal boron nitride (h-BN) are introduced to regulate the supercooling and thermal properties of erythritol. The crystal growth and nucleation process of erythritol is promoted effectively by CMC-Na and h-BN, as a result, the supercooling degree and solidification stability degree of erythritol is suppressed observably. According the results, while retaining the high latent heat of erythritol, the defect of supercooling of erythritol is effectively improved. The supercooling degree and solidification stability degree of erythritol are suppressed by 93% and 84%, respectively. Furthermore, the high latent heat, good thermal conductivity and excellent cycling thermal stability of erythritol composite phase change materials (ECPCM) are also available. This conclusion is important for supercooling regulation and thermal property optimization of erythritol, and indeed, can promote the utilization of erythritol in medium-temperature thermal energy storage.

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