Thermo-differential valve

Coming soon; the all new Thermo-Differential Bypass Valve!

This video demonstrates the world's first one-way valve for heat flow, or 'heat diode'; the Thermo-Differential Bypass Valve. Check out the amazing speed and accuracy of this self-actuating 'mechanical' valve, beating even very sophisticated electronic systems, while this simple valve uses no electronics at all! The experimental set-up simulates a solar system operating without a controller, where the solar system would simple operate when the sun shines, for example by using a DC pump powered by a small PV panel.