This is my Lord Kelvin Generator design with an rotary vaporizer power upgrade. This device will produce High Voltage. Probably with enough ampere to kill you, so be careful.
Basically you have two options.
1. * Build it like in the picture. The rotation disc should be of insulating material. The inner fat ring and the outer ring should be out of conductive material. Use simple tap water.
2. * Remove the the inner fat ring and make the rotating disc out of conducting material. Connect this disc not with the opposite outer ring.
(Additional option: Just use the rotating disc vaporizer to create snow when it is very cold outside.)