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A new way to cool air

12.01.2023

The technique, proposed by scientists from the University of California at Berkeley, is to add charged particles and electricity to the environment. With their help, you can make the ice melt without heating, cooling the air around.

The new method was called ionocaloric cooling. Strictly speaking, something similar has been used for a long time - for example, when treating icy roads with salt.

In this case, the ions on the surface are associated with water molecules in the semi-liquid layer. With different molecular orientations, this causes water molecules to separate from the surface layer and increase its temperature-determined thickness, so most of the ice block melts when it joins the surface layer.

The California scientists' discovery was to add electricity to this cycle. The researchers simulated the ionocaloric cycle by running a current through it. The latter, passing through the system, moved the ions, shifting the melting point of the material and changing the temperature.

Thus, they were able to change the temperature by 25 °C with just one volt of charge. The results were extremely inspiring to physicists who sought to invent an efficient, environmentally friendly and inexpensive way to cool.

"Our data looks very promising on all three fronts," said mechanical engineer Ravi Prasher of Lawrence Berkeley National Laboratory.

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As a result of their vital activity, oil-containing effluents from metallurgical plants turn into compounds that do not harm nature. The final product of microbiological decomposition is humic acids, which can serve as a fertilizer.

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