Patent ID: 8217312

Claim:
Method for heating a fluid, in particular a fluid which is not electrical conductive, where a rotor body ( 10 ) which is arranged in a chamber for absorption of the fluid, is rotated with a generally vertical shaft ( 11 ), and where a voltage is applied to a rod shaped electrode ( 16 ) which is arranged centrally in a rotor chamber ( 12 ) and to an electrode at the bottom ( 13 ) of the rotor chamber, for creation of a flame arc, and where it is created a flow of the fluid passing the flame arc, where the length (L) of the flame arc is held generally constant by controlling the position of the rod shaped electrode ( 16 ) and the fluid is provided to the rotor chamber ( 12 ) so that it is kept free of the flame arc, and that the fluid is brought to flow through the rotor chamber ( 12 ).