Design and Preparation of Carbon Based Composite Phase Change Material for Energy Piles

作者：Yang, Haibin; Memon, Shazim Ali; Bao, Xiaohua^*; Cui, Hongzhi; Li, Dongxu

来源：Materials, 2017, 10(4): 391.

DOI：10.3390/ma10040391

• composite phase change materials
• expanded graphite
• graphite nanoplatelet
• energy storage
• energy piles

Energy piles-A fairly new renewable energy concept-Use a ground heat exchanger (GHE) in the foundation piles to supply heating and cooling loads to the supported building. Applying phase change materials (PCMs) to piles can help in maintaining a stable temperature within the piles and can then influence the axial load acting on the piles. In this study, two kinds of carbon-based composite PCMs (expanded graphite-based PCM and graphite nanoplatelet-based PCM) were prepared by vacuum impregnation for potential application in energy piles. Thereafter, a systematic study was performed and different characterization tests were carried out on two composite PCMs. The composite PCMs retained up to 93.1% of paraffin and were chemically compatible, thermally stable and reliable. The latent heat of the composite PCM was up to 152.8 J/g while the compressive strength of cement paste containing 10 wt % GNP-PCM was found to be 37 MPa. Hence, the developed composite PCM has potential for thermal energy storage applications.

• 出版日期2017-4
• 单位深圳大学