Air heater

convection

Channel-type air heaters are designed for efficiently heating of flowing gaseous fluids, air in most cases. The design is based on the general conditions such as the type and properties of the respective fluid, pressure and temperature as well as the desired operating points in the process. Channel-type air heaters directly heat fluids. To this effect, electrical energy in the heating elements is converted to thermal energy. The thermal energy is then transferred from the heating rods to the fluid. Here, it is important that the design be matched to the general conditions, for each fluid has its specific properties. Normally, only air is heated in electrical channel-type air heaters. This heated air is used for different purposes: Heating of air Sealing air Process air Hot air The fluid to be heated and the application temperature mainly define the materials which can be used for the unheated and/or heated surfaces. Materials of the wetted and unheated components Carbon steel Corrosion-resistant stainless steel Heat-resistant stainless steel Titanium, Hastelloy, special materials Brass Materials of the heating surface: Carbon steel Corrosion-resistant stainless steel Heat-resistant stainless steel Titanium, Hastelloy, special materials The design of the individual heating elements is a function of the application. There are faster or slower heating elements, mechanically robust or more filigree designs. Also, a distinction is made between compacted heating elements and heating elements where the internal heating insert can be replaced without the necessity of draining the fluid.