Radiators of this type, as follows from their name, are designed to heat the air using mainly convective component of heat transfer. Structurally convection radiators consist of a copper pipe, with aluminum ribs struck or attacked on it. These two materials have the highest coefficient of thermal conductivity from available materials, giving way to this parameter only silver. The coolant moves through copper pipes, so all elements of the heating system should be made of one material (boiler heat exchanger, reinforcement, radiators) to avoid the appearance of electrochemical corrosion and increase its durability.
The coolant enters the vertical collector of the radiator, which distributes it along the horizontal rows of copper tubes, which reduces the overall hydraulic resistance of the radiator, and increases the speed of circulation.
The thermal power of the convection radiator transmitted by radiation is no more than 10 % of the total power, everything else is on the convection component, so the wall practically does not heat up behind it. It is not necessary to mount it under the window, since convection occurs effectively anywhere.
The disadvantages of this type of radiators that limit their use include high cost – they are the most expensive of all types of heating radiators, as they are made of copper and aluminum. Also, convection radiators are produced strictly defined sizes, which makes the choice of the radiator for the room more complicated, due to the impossibility of changing the number of sections. Often the radiator of the required size is absent in the warehouse, and the delivery time to the order may be large.
