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智能聚合物复合热开关用于地热能源采集

Chengbin Yu¹, Sarah Li², Arash Dahi Taleghani³

¹Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.

ACS applied materials & interfaces

|March 21, 2025

概括

研究人员开发了一种用于地热能的新型复合热开关,使用在烯基基质矩阵中的聚合物人工肌肉. 这种智能材料在高温下表现出可逆启动和稳定性,提高了取热效率.

科学领域:

材料科学材料科学材料科学
能源工程能源工程
聚合物科学聚合物科学

背景情况:

地热能提供了一个可持续的电源,但在控制热吸收方面面临着挑战.
有效的热管理对于优化从地热水库中提取能源至关重要.

研究的目的:

为增强的地热系统设计和合成一个复合热开关.
开发一种能够在高温地热环境中调节水流和吸收热量的材料.

主要方法:

使用聚合物人工肌肉 (尼龙纤维) 嵌入在聚乙烯化物-co-bexafluoropropylene (PVDF-HFP) 和二过氧化物 (DCP) 氧化物矩阵中,创建了一个复合热开关.
复合材料的热启动 (加热时收缩,冷却时膨胀) 在温度周期 (25-200°C和150-200°C) 中进行了测试.
在长时间暴露在压力容器中的200°C水中后,评估了化学稳定性和可逆作用. 开发了一个结构力学模型来分析设计参数.

主要成果:

复合热开关表现出显著的可逆启动,加热时最大收缩 (CUH) 为10.76%和冷却时最大膨胀 (EUC) 为10.89%在25至200°C之间.
在更高的温度下,执行性能保持不变,CUH为2.12%,EUC为3.36%在150至200°C之间.
该材料在200°C水中4周后表现出卓越的可逆执行和化学稳定性,性能优于对照化.

结论:

开发的复合热开关采用PVDF-HFP/DCP光电体和尼龙人工肌肉,显示了增强地热系统的巨大潜力.
它能够承受高温并表现出可逆执行的能力,使其适合作为智能推进器或门,用于改进热提取.
该研究为优化智能材料的基础,通过设计导向的建模,为要求高的地热应用提供了基础.

关键词:

人工肌肉是一种人造肌肉.增强的地热系统 (EGS)烯酸乙烯酸体的烯酸乙烯酸体.作为一个推进者.可逆式启动的启动方式智能热开关是一个智能热开关.

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