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Study on Heat Transfer Process and Fresh Water Output Performance of Phase Change Heat Storage Dehumidifier

Author

Listed:
  • Lixi Zhang

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China)

  • Kai Feng

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China)

  • Zhendong Xie

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China)

  • Kangbo Wang

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China)

Abstract

In the humidification-dehumidification solar desalination process, using phase change materials to recover water vapor condensation latent heat in the dehumidification can improve heat utilization and water production performances. When sodium thiosulfate pentahydrate and paraffin were used as phase change materials respectively in the phase change heat storage dehumidifier, by means of numerical simulation and experiment, the heat transfer process, entropy generation, and water production performances of heat pipes and copper wire meshes coupled phase change materials in the dehumidifier were studied. The results showed that sodium thiosulfate pentahydrate has stronger heat transfer ability, higher thermal entropy generation, and heat storage capacity than paraffin; adding copper wire meshes into the phase change material can accelerate heat transfer and shorten the time required for monitoring points to reach phase change temperature; increasing the wet air temperature at inlet of phase change heat storage dehumidifier, using copper wire meshes in the phase change material, increasing the diameter of copper wire mesh, and using a passive basin desalinator for secondary water production can improve water production performances. In brief, the use of sodium thiosulfate pentahydrate and copper wire meshes in the phase change heat storage dehumidifier leads to better heat storage and heat transfer effects.

Suggested Citation

  • Lixi Zhang & Kai Feng & Zhendong Xie & Kangbo Wang, 2022. "Study on Heat Transfer Process and Fresh Water Output Performance of Phase Change Heat Storage Dehumidifier," Energies, MDPI, vol. 15(4), pages 1-21, February.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1504-:d:751922
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    References listed on IDEAS

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