Scientists from the Massachusetts Institute of Technology (MIT) have developed a heating element surface structure that allows faster and easier boiling of water. Professor Evelyn Wong and her co-authors write about this in an article published in the journal Advanced Materials.
The constructed array has depressions 10 micrometers wide – they are located two millimeters apart on small “columns”. These elevations direct the heated water from the very bottom to the recesses, creating a continuous flow of liquid. Due to this, bubbles with boiling water form faster, are fixed in place and do not merge. This effect improves the wear resistance of the heating apparatus and saves energy.
Laboratory experiments with the new heater showed that, unlike modern analogues, its heat transfer coefficient is almost four times higher, and the critical heat flux is one and a half times higher. The solution proposed by physicists will reduce energy costs in a wide range of industrial production, as well as open the way to better cooling in electronics.