However this principle demands new constructive registration of the device, has impact on its output parameters about technical and economic indicators. Calculations show, the more the module, the it is more difficult to design the device, but the possibility of unification of knots and details is more.
On a way of heating distinguish coppers with indirect and direct heating. Coppers with indirect heating gained the greatest distribution. As the intermediate heat carrier in such coppers water is used (boiled or distilled).