石煤基复合相变材料的储热性能强化研究

谢宝珊; 马欢; 李传常; 陈荐

doi:10.1007/s12613-023-2682-x

Volume 31 Issue 1

Jan. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(1): 206-215

Baoshan Xie, Huan Ma, Chuanchang Li, and Jian Chen, Enhanced properties of stone coal-based composite phase change materials for thermal energy storage, Int. J. Miner. Metall. Mater., 31(2024), No. 1, pp. 206-215. https://doi.org/10.1007/s12613-023-2682-x

Cite this article as:

Baoshan Xie, Huan Ma, Chuanchang Li, and Jian Chen, Enhanced properties of stone coal-based composite phase change materials for thermal energy storage, Int. J. Miner. Metall. Mater., 31(2024), No. 1, pp. 206-215. https://doi.org/10.1007/s12613-023-2682-x

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研究论文

石煤基复合相变材料的储热性能强化研究

1)
长沙理工大学能源与动力工程学院可再生能源电力技术湖南省重点实验室，长沙 410114，中国
2)
长沙理工大学电网防灾减灾全国重点实验室，长沙 410114，中国

通讯作者:
李传常 E-mail: chuanchangli@126.com

文章亮点

(1) 提出了基于提钒后石煤开发复合相变储热材料的新方法。

(2) 系统探究了焙烧温度和时间对石煤基体储热特征的影响规律。

(3) 揭示了提钒后改性石煤强化相变材料储热性能的机理。

中文摘要

充分利用石煤(SC)的矿物特性和提钒后石煤的二次利用潜力，将高潜热相变材料(PCMs)与低成本矿物相结合，开发出高效复合相变储热材料。本文以经焙烧和酸浸协同提钒处理的石煤为基体、硬脂酸(SA)为 PCM、膨胀石墨(EG)为导热粒子，制备了石煤基复合相变储热材料。系统探究了不同焙烧温度和焙烧时间下原矿石煤的提钒效果，研究了提钒后石煤对复合材料负载能力和热导率的影响。结果表明，经900°C 焙烧3 h和硫酸酸浸协同处理的原矿石煤，获得了最佳提钒效果(钒浸出率35.92%)；提钒作用提高了基体的比表面积，并提升了复合材料的负载量6.2%；采用石煤为基体强化了相变材料的导热性能，添加 3wt% EG分别提高了复合材料的负载能力和导热率127% 和 48.19%；所设计的复合材料具有高负载率(66.69%)和高热导率(0.59 W·m⁻¹·K⁻¹)，其相变温度为 52.17°C，熔化潜热为 121.5 J·g⁻¹，并具有良好的化学相容性。本工作提出二次开发石煤特性制备复合相变储热材料的新方法，在建筑节能领域的具有极大的应用前景。

关键词:

Research Article

Enhanced properties of stone coal-based composite phase change materials for thermal energy storage

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Abstract

Abstract

Phase change materials (PCMs) can be incorporated with low-cost minerals to synthesize composites for thermal energy storage in building applications. Stone coal (SC) after vanadium extraction treatment shows potential for secondary utilization in composite preparation. We prepared SC-based composite PCMs with SC as a matrix, stearic acid (SA) as a PCM, and expanded graphite (EG) as an additive. The combined roasting and acid leaching treatment of raw SC was conducted to understand the effect of vanadium extraction on promoting loading capacity. Results showed that the combined treatment of roasting at 900°C and leaching increased the SC loading of the composite by 6.2% by improving the specific surface area. The loading capacity and thermal conductivity of the composite obviously increased by 127% and 48.19%, respectively, due to the contribution of 3wt% EG. These data were supported by the high load of 66.69% and thermal conductivity of 0.59 W·m⁻¹·K⁻¹ of the designed composite. The obtained composite exhibited a phase change temperature of 52.17°C, melting latent heat of 121.5 J·g⁻¹, and good chemical compatibility. The SC-based composite has prospects in building applications exploiting the secondary utilization of minerals.
- thermal energy storage;
- phase change material;
- stone coal;
- vanadium extraction;
- secondary utilization

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References

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石煤基复合相变材料的储热性能强化研究

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Enhanced properties of stone coal-based composite phase change materials for thermal energy storage

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