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Silica gel microfibres by electrospinning for adsorption chillers

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  • Freni, A.
  • Calabrese, L.
  • Malara, A.
  • Frontera, P.
  • Bonaccorsi, L.

Abstract

Silica gel is one of the most used porous material in commercial water adsorption chillers for the low cost and large market availability. In most applications, silica gel is used as granules with limitation in heat transfer efficiency and material hydrothermal stability. In this work, preliminary results of a new hybrid coating made of microfibres obtained by the electrospinning of silica gel/polymer solutions are presented. Polyacrylonitrile (20 wt%) and different silica gel powders (80 wt%) were mixed and electrospun to produce fibrous coatings on aluminium surfaces. Thermal analysis of the hybrid microfibres by TGA-DSC showed that the coating was stable up to T = 290 °C with no evidence of thermal degradation of the microfibres. Measurements of water adsorption isobars of silica gel microfibres at P = 11 mbar and P = 42 mbar showed that the water adsorbed was 80 wt% of the water uptake capability of the original silica gel demonstrating that the polymeric component of microfibres did not occluded the adsorbing material porosity.

Suggested Citation

  • Freni, A. & Calabrese, L. & Malara, A. & Frontera, P. & Bonaccorsi, L., 2019. "Silica gel microfibres by electrospinning for adsorption chillers," Energy, Elsevier, vol. 187(C).
    • Handle: RePEc:eee:energy:v:187:y:2019:i:c:s0360544219316615
    DOI: 10.1016/j.energy.2019.115971
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    Cited by:

    1. Lucio Bonaccorsi & Antonio Fotia & Angela Malara & Patrizia Frontera, 2020. "Advanced Adsorbent Materials for Waste Energy Recovery," Energies, MDPI, vol. 13(17), pages 1-15, August.
    2. Luigi Calabrese & Walter Mittelbach & Lucio Bonaccorsi & Angelo Freni, 2022. "An Industrial Approach for the Optimization of a New Performing Coated Adsorber for Adsorption Heat Pumps," Energies, MDPI, vol. 15(14), pages 1-14, July.
    3. Larisa Gordeeva & Yuri Aristov, 2022. "Adsorbent Coatings for Adsorption Heat Transformation: From Synthesis to Application," Energies, MDPI, vol. 15(20), pages 1-25, October.
    4. Angela Malara & Fabiola Pantò & Saveria Santangelo & Pier Luigi Antonucci & Michele Fiore & Gianluca Longoni & Riccardo Ruffo & Patrizia Frontera, 2021. "Comparative life cycle assessment of Fe2O3-based fibers as anode materials for sodium-ion batteries," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 23(5), pages 6786-6799, May.
    5. Patrizia Frontera & Lucio Bonaccorsi & Antonio Fotia & Angela Malara, 2023. "Fibrous Materials for Potential Efficient Energy Recovery at Low-Temperature Heat," Sustainability, MDPI, vol. 15(8), pages 1-14, April.
    6. Calabrese, Luigi & Bruzzaniti, Paolo & Palamara, Davide & Freni, Angelo & Proverbio, Edoardo, 2020. "New SAPO-34-SPEEK composite coatings for adsorption heat pumps: Adsorption performance and thermodynamic analysis," Energy, Elsevier, vol. 203(C).

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