Heat pump uses a loudspeaker and wet strips of paper to cool air
A prototype heat pump that uses water and sound to cool is three times as efficient as previous comparable designs
https://www.newscientist.com/article/2349973-heat-pump-uses-a-loudspeaker-and-wet-strips-of-paper-to-cool-air/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
https://www.newscientist.com/article/2349973-heat-pump-uses-a-loudspeaker-and-wet-strips-of-paper-to-cool-air/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
