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Effect of porous media on the heat transfer enhancement for a thermal energy storage unit

CLEANER ENERGY FOR CLEANER CITIES, 2018, p.984 [Peer Reviewed Journal]

DOI: 10.1016/j.egypro.2018.09.104

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  • Title:
    Effect of porous media on the heat transfer enhancement for a thermal energy storage unit
  • Author: Yu, Jiabang ; Yang, Ying ; Yang, Xiaohu ; Kong, Qiongxiang ; Yanhu, Liu ; Yan, Jinyue
  • Subjects: metal foam ; numerical simulation ; Phase change materials ; shell and tube exchangers ; thermal energy storage
  • Is Part Of: CLEANER ENERGY FOR CLEANER CITIES, 2018, p.984
  • Description: Thermal energy storage (TES) can effectively recover thermal energy from low-temperature waste heat and it has now been received increasing attentions in practical engineering applications. Nevertheless, the relatively low thermal conductivity of engineering available phase change materials (PCMs) greatly limits the energy efficiency of TES applications. To enhance the phase change process, open-cell metal foam with a porosity of 0.94 and pore density of 15 PPI (pore per inch) was employed to be inserted either in heat transfer fluid (HTF) or in phase change material (PCM). A two-dimensional axis-symmetric problem was numerically solved and was validated through comparing temperature history at selected points. Results demonstrated that the involvement of open-cell metal foam can effectively enhance the phase change heat transfer, greatly reducing the full melting time. By comparing the four cases (without metal foam, inserting metal foam into HTF, PCM and both domains), the case that both HTF and PCM domains were embedded with porous media can provide the best heat transfer enhancement, from which practical applications with thermal engineering may benefit.
  • Language: English
  • Identifier: DOI: 10.1016/j.egypro.2018.09.104
  • Source: SWEPUB Freely available online
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