Scientists have developed a new refrigeration approach that could one day replace the systems used in today’s refrigerators and air conditioners. The method, called ionocaloric cooling, works by adding and removing salt from a liquid to change how it melts and freezes, similar to how salt melts ice on winter roads. That process absorbs heat and creates a cooling effect.
Unlike conventional refrigerators that rely on pressurized gases that can negatively impact the environment, this system uses common materials and very small electric currents to drive the cooling cycle. In early experiments, researchers were able to produce temperature changes of about 25°C (45°F), showing promising performance.
If the technology scales successfully, it could lead to safer, more energy-efficient cooling for homes, buildings, and electronics while helping the world move away from refrigerants that contribute to global warming.
"No one has successfully developed an alternative solution that makes stuff cold, works efficiently, is safe, and doesn't hurt the environment. We think the ionocaloric cycle has the potential to meet all those goals if realized appropriately."
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