Revealing interfacial heating effects on water evaporation during surface distillation

Ohchan Kwon, Seung Kwon Seo, Yun Chul Woo, Chul Jin Lee, Dae Woo Kim

Research output: Contribution to journalArticlepeer-review


Interfacial heating is a widely adopted concept to effectively incur water evaporation in brines. Despite its wide application, namely for solar thermal and membrane distillations, there has been limited study on the criteria and efficacy of the approach. Herein, we propose a model system for evaluating surface heating effects on water evaporation using buoyant mesh Joule heaters. The buoyant mesh Joule heater was prepared by thermally oxidizing commercial Ni-Cr mesh, followed by coating with PTFE to enhance hydrophobicity. By applying voltages, the temperature of the heater can be controlled spontaneously up to 250 °C; the heater floats on water surfaces, accelerating the evaporation at the water/air interface. The setup's simplicity allows a systematic study of the interfacial heating method's depth effect, which was then further correlated with computational fluid dynamic simulations to investigate the fundamentals of accelerated water evaporation at water/air interfaces.

Original languageEnglish
Article number115867
Publication statusPublished - 2022 Sept 1

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) ( NRF-2020R1C1C1003289 ). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education ( NRF-2019R1A6A1A11055660 ). This work was supported by the Technology Innovation Program ( 20013621 , Center for Super Critical Material Industrial Technology) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). O. Kwon specifically thanks S.Y. Yook for his aid in designing the water trap.

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering


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