Friction heating is based on molecular rubbing, more precisely the same molecules of the product inside the heater are set in motion and the friction effect release heat. It is basically composed by an asynchronous motor driven by inverter, the rotor is connected to a special disk, rotating at a small distance from a stator disk.
This heater is meant for all kind of liquid, with any density and viscosity, but without suspended solid particles. It is admitted the presence of suspended particles only for size less than 0.2mm and in a percentage not exceeding 20%. After heating the appearance of such particles may appear completely different depending on their composition: normally they are amalgamated and there is no visible trace at the output of the heater, for this reason the heater can be used, if possible, to perform both the function of the heater and smoothing/homogenizer.
The friction heater has been designed by Emmepiemme primarily to allow ultra-fast heating without contact with “hot wall”, for products with no electrical conductivity, such as oil, margarine, butter, liquid chocolate, petroleum products which could not be heated in ohmic heaters.
It has a global efficiency of about 85% and is characterized by a precision, uniformity and stability of temperature greater than any other means. On the other hand, it’s a mechanical object with rotating and mechanical seals, so it presents all the maintenance problems typical of these equipment.
The friction heater is available only for large powers, the smallest model has a thermal output of 50 kW, maximum temperature gap of 50 ° C, maximum outlet temperature of 145 ° C with precision +/- 0.1 ° C and a medium heating time of about 1.5 seconds.