Calorifier or air heater is used in the ventilation system for heating the cold air supplied outside in the autumn-winter period. Calorifiers are also used in heating and air conditioning systems of various rooms. The principle of operation of the air heater is quite simple: in the tubes located inside the califfer, there is a warmed coolant, the air passes through the calorifier, blowing the tubes, and heats up. The air heater is connected to the coolant system using a flange connection or welding. And the calorifier case is made of carbon steel. By the type of coolant, steam and water heaters are released. Water air heaters are distinguished by a horizontal arrangement of heat -rolling elements and a multi -flow movement of the coolant. In a water calorifier is supplied through special fittings and heated water is excreted. In the steam high -cost, the elements of heat transfer are installed vertically. These calorifers are distinguished by the fact that steam circulates steam inside the air heater. The choice of califer depends on the possibilities to bring one of them. Among the air heaters, the most common water heaters are most common. They are most often used in large offices, the area of which is over 100 kV. m.
There are several types of steam and lead heaters. In the smooth -tube ducts, the heating element, respectively, the pipes with a smooth surface serve as a heating element. To increase heat transfer, the system should include a large number of tubes, the distance between which is minimal.
In the plate calorifier, the outer surface of the pipe to increase the area of heat transfer and heat transfer intensity is supplied with nut. The rib is a steel plate with holes for planting other plates that distinguish various shapes and sizes.
In a copper-aluminum air heater, nozzles and collectors are made of copper pipes with aluminum nut. Their main advantages include small weight, compactness, good aerodynamic characteristics, a flexible design that allows you to choose performance, size, etc. D.
If the air consumption is not too large and it is not required to heat it to high temperatures, it is better to prefer a smooth -steep calorifer. If you, on the contrary, need high thermal engineering indicators, purchase devices with a ribbed surface.