华电技术 ›› 2021, Vol. 43 ›› Issue (10): 86-91.doi: 10.3969/j.issn.1674-1951.2021.10.011

• 研究与开发 • 上一篇    

废旧混凝土基定型相变储热材料的储热研究

熊亚选1(), 胡子亮1(), 王辉祥1(), 药晨华1(), 宋超宇1(), 丁玉龙2   

  1. 1.北京建筑大学 供热供燃气通风及空调工程北京市重点实验室,北京100044
    2.英国伯明翰大学伯明翰储能中心,B15 2TT,英国
  • 收稿日期:2021-04-27 修回日期:2021-05-12 出版日期:2021-10-25 发布日期:2021-10-11
  • 作者简介:熊亚选(1977—),男,河南原阳人,教授,博士,从事高温熔盐储热方面的研究(E-mail: xiongyaxuan@bucea.edu.cn)。
    胡子亮(1997—),男,河北石家庄人,在读硕士研究生,从事固体储热方面的研究(E-mail: 872971547@qq.com)。
    王辉祥(1997—),男,河南郑州人,在读硕士研究生,从事固体储热方面的研究(E-mail: whx754137921@163.com)。
    药晨华(1997—),男,山西临汾人,在读硕士研究生,从事固体储热方面的研究(E-mail: ych1261072340@163.com)。
    宋超宇(1998—),女,山西长治人,在读硕士研究生,从事固体储热方面的研究(E-mail: 1807931498@qq.com)。
    丁玉龙(1962—),男,江苏海安人,教授,英国皇家工程院院士,博士,从事储能方面的研究。
  • 基金资助:
    北京市教委科研项目(KM201910016011)

Study on shape-stable phase-change heat-storage materials based on waste concrete

XIONG Yaxuan1(), HU Ziliang1(), WANG Huixiang1(), YAO Chenhua1(), SONG Chaoyu1(), DING Yulong2   

  1. 1. Key Lab of Heating,Gas Supply,Ventilating and Air Conditioning Engineering,University of Civil Engineering and Architecture,Beijing 100044,China
    2. Birmingham Center for Energy storage,University of Birmingham,Birmingham B15 2TT,UK
  • Received:2021-04-27 Revised:2021-05-12 Online:2021-10-25 Published:2021-10-11

摘要:

热能存储(TES)技术中的骨架材料需要采集或合成,对环境造成破坏,为早日实现碳中和、碳达峰目标,同时规模化消纳城市固体废弃物,避免废旧混凝土大量堆积,以废旧混凝土为骨架材料制备定型相变储热材料。利用X射线衍射法(XRD)分析定型相变储热材料的化学相容性,扫描电子显微镜(SEM)、差示扫描量热法(DSC)和激光闪射法表征定型相变储热材料的微观结构、导热性能、储热性能。试验结果显示,定型相变储热材料中的硝酸盐质量分数为50%时成型效果最佳且具有良好化学相容性,其潜热为31 kJ/kg;在100~400 ℃范围内,储热密度为505.90 kJ/kg;导热系数为0.12 W/(m·K)。综上可得出废弃混凝土作为骨架材料是可行的。

关键词: 固体废弃物, 废旧混凝土, 骨架材料, X射线衍射法, 差示扫描量热法, 储热性能, 碳中和, 碳达峰

Abstract:

The collection and synthesis of the skeleton materials for thermal energy storage(TES) will pollute our environment.To achieve the goal of carbon peaking and carbon neutrality as soon as possible,consume large-scale municipal solid wastes and avoid serious waste concrete accumulation,we take waste concrete as the skeleton material to fabricate shape-stable phase-change heat-storage materials.The chemical compatibility of a shape-stable phase-change material was analyzed by X-Ray Diffraction(XRD).And the micro-structure,thermal conductivity and TES performance of the composite were characterized by Scanning Electron Microscopy(SEM),Differential Scanning Calorimeter(DSC)and Laser Flash Analysis(LFA).The experimental results show the shape-stable composite is of the best molding effect and decent chemical compatibility when its nitrate mass fraction is 50%.With this proportion,its latent heat is 31 kJ/kg,the heat storage density is 505.90 kJ/kg in the range of 100~400 ℃,and the thermal conductivity is 0.12 W/(m·K).It can be concluded that using waste concrete as the skeleton material for heat-storage composite is feasible.

Key words: solid waste, solid waste concrete, skeleton material, X-Ray Diffraction, Differential Scanning Calorimetry, thermal storage capacity, carbon neutrality, carbon peak

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