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首页> 外文期刊>Renewable energy >Enhanced properties of phase change material -SiO_2-graphene nanocomposite for developing structural-functional integrated cement for solar energy absorption and storage
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Enhanced properties of phase change material -SiO_2-graphene nanocomposite for developing structural-functional integrated cement for solar energy absorption and storage

机译：增强相变材料的性能-SiO_2-石墨烯纳米复合物，用于显影太阳能吸收和储存的结构功能综合水泥

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The global transition to renewable energy leads to improve energy security, advance economic development, improve access to energy, and mitigate global climate change. Sustainable development is possible by the use of sustainable energy and by ensuring access to affordable, sustainable, and reliable energy. However, the most renewable energy sources are intermittent and this intermittency can be tackled by the use of energy storage. Here, a novel form stable phase change material (PCM) nano composite was designed for solar energy absorption and storage in the building. N-nonadecane as PCM, SiO2 nanoparticles as supporting materials, and graphene as thermal conductivity promoter were used to obtain n-nonadecane-SiO2-graphene nanocomposite. The surface morphology, chemical structure, and thermal features of the produced nanocomposite were examined by scanning electron microscopy (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FTIR), and differential scanning calorimetry (DSC). The created nanocomposite can store 120.40 J/g when it undergoes phase change process and it also has outstanding cycling thermal reliability and chemical stability even after 500 cycles. In addition, the solar energy absorption and storage rate of the cement board integrated with obtained nanocomposite was enhanced due to the improved interfacial thermal transfer by graphene compared to the cement-only board under equivalent conditions. Furthermore, the findings of the model room test advocated that the cement wallboard with 10% PCM nanocomposite reduced indoor temperature variations and therefore, this nanocomposite can be used in the renewable solar energy storage systems, thermal comfort applications, and energy management. (C) 2021 Elsevier Ltd. All rights reserved.
机译：全球向可再生能源过渡导致能源安全，推进经济发展，改善能源的进入，并减轻全球气候变化。通过使用可持续能源和通过确保获得负担得起，可持续和可靠的能量，可持续发展是可能的。然而，最可再生能源是间歇性的，并且可以通过使用能量存储来解决这种间隔。这里，设计了一种新型稳定相变材料（PCM）纳米复合材料，用于建筑物中的太阳能吸收和储存。 N-非丙烷作为PCM，SiO2纳米粒子作为支撑材料，以及石墨烯作为导热促进剂，得到N-非丙烷-SiO 2-石墨烯纳米复合材料。通过扫描电子显微镜（SEM），X射线衍射仪（XRD），傅里叶变换红外光谱仪（FTIR）和差示扫描量热法（DSC）检查所生产的纳米复合材料的表面形态，化学结构和热特征。在经历相变过程时，所产生的纳米复合材料可以存储120.40J / g，即使在500次循环之后也具有出色的循环热可靠性和化学稳定性。此外，由于在等效条件下，通过石墨烯的改善的界面热传递，增强了与所得纳米复合材料的水泥板的太阳能吸收和储存速率提高了。此外，模型室测试的发现主张，具有10％PCM纳米复合材料的水泥墙板降低了室内温度变化，因此，该纳米复合材料可用于可再生太阳能储能系统，热舒适性应用和能源管理。 （c）2021 elestvier有限公司保留所有权利。

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