Ohm is where the heat is...
6 Dec 2000
EA Technology has devised a pilot-scale model of its ohmic heating unit to enable process development researchers to evaluate its use. The unit could also be used for small-volume heating applications.
Ohmic heating generates heat by passing current directly through process fluids, rather than by contact with a heated surface. Among its advantages is its ability to heat fluids which are corrosive or contain solids, without generating hot-spots or fouling hot surfaces.
'We believe the technique has tremendous potential, particularly where there is a need to heat aggressive or problematic fluids,' comments EA Technology's process engineering manager, Mike Colley.
The pilot heater is a Z-shaped tube section, 520mmx520mm, weighing 19kg. Electrodes on either side of the central pipe section apply a current capable of heating fluids to 100°C at a flow-rate of 2kg/min. Versions are available to handle higher temperatures and pressures, Colley says.
