I wonder how ultrasonic dryers have been doing lately. I don't know anything about them, but heard about them at an ARPA-E conference a while back. Don't know

I wonder how ultrasonic dryers have been doing lately. I don't know anything about them, but heard about them at an ARPA-E conference a while back. Don't know if this is still very low TRL, or just massively too expensive, or really doesn't work all that well. But they are supposed to be much more electrically efficient. https://www.energy.gov/eere/articles/no-heat-no-problem-ultrasonic-dryer-dries-clothes-half-time https://www.energy.gov/eere/articles/no-heat-no-problem-ultr...