From pv magazine International
Researchers at Scotland’s Heriot-Watt University have developed a waterless self-cleaning technology for PV panels which involves vibration to remove dust and sand by exciting fundamental frequencies in the modules.
“It is not the first system based on a vibration mechanism but it is the first inspired by cymatics,” said research coordinator Edwin Babu, referring to the study of sound vibration to understand the nature of sound and matter – or, in more recognizable terms, the characters of the Big Bang Theory TV show putting a cornstarch mixture on an amplifier and watching the patterns.
The Heriot-Watt process operates at a lower frequency than the 20kHz or higher band at which ultrasonic cleaning systems typically run.
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