Biphilic heat exchange surfaces for drip irrigation cooling systems
| Parent link: | International Journal of Heat and Mass Transfer.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 224.— 2024.— Article number 125316, 18 p. |
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| Other Authors: | , , , , , |
| Summary: | Title screen Evaporation and boiling of liquid droplets on a heated surface are widespread in a variety of industrial applications, including drip cooling systems. Many attempts have been made to improve the efficiency of drip cooling. Laser radiation is the most promising direction for modifying heating surfaces in order to intensify the processes of phase transition of liquids. In this work, based on laser texturing, an approach was developed to form the microtexture configuration and biphilic (as well as superhydrophilic) wetting properties, which make it possible not only to control the geometric dimensions of droplets during their intense phase transition on a heat-loaded surface, but also to significantly intensify surface cooling in comparison with a polished surface. The droplet evaporation on modified surfaces was studied using shadow method with equipment for high-speed recording and micro PIV (Particle Image Velocimetry) method. An approach has been developed to determine the surface cooling phenomena based on the method of contact temperature measurements using low-inertia micro-sized thermocouples. The texture configuration and wettability properties of local regions on biphilic surfaces were determined, making it possible to control the localization of droplets on the surface and intensify the phase transition process. The conditions for the formation of dry spots on biphilic surfaces with a combination of extreme wetting properties were established. It was shown that in drip irrigation systems, in order to increase the velocity of convection flows in an evaporating droplet, it is preferable in practice to use biphilic surfaces with a combination of superhydrophilic and superhydrophobic properties Текстовый файл AM_Agreement |
| Published: |
2024
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| Online Access: | https://doi.org/10.1016/j.ijheatmasstransfer.2024.125316 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=676998 |