Enhancing water evaporation by combining dynamic and static treatment of magnetic field

• Published in: Desalination and water treatment 2021-03, Vol.216, p.299-305
• Main Authors: Yang, Quan-wei, Wei, Huinan, Li, Zhuangwen
• Format: Article
• Language: English
• Subjects: Dynamic treatment; Magnetic field; Static treatment; Surface tension; Water evaporation
• ISSN: 1944-3986; 1944-3986
• DOI: 10.5004/dwt.2021.26829

Water evaporation is essential for various applications, including seawater desalination and evaporative cooling system. If the water evaporation rate becomes fast through water treatment technology, satisfactory efficiency can be achieved in these applications. In this study, the potential of enhancing water evaporation by combining dynamic and static treatment of magnetic field was explored. Water was firstly treated by dynamic treatment of the magnetic field. Then the treated water was exposed to the static magnetic field and its evaporation amount was measured. The effect of magnetic field strength on water evaporation was investigated. The surface tension of water was determined to explain the mechanism behind variation of water evaporation. Results show that the single dynamic magnetic treatment can promote the evaporation rate of water. The combination of dynamic and static magnetic treatment generates a synergistic effect and significantly improves the water evaporation, and a maximum enhancement of 14.3% is obtained in this study. The behind mechanism is magnetic field treatments decrease the surface tension of water and induce water molecule to escape from water to air interface easily. This study presents an effective and economical approach to improve water evaporation rate with simple operation and low energy consumption, and contributes to the high efficiency in applications involves water evaporation.