Capillarity

Capillarity is a physical phenomenon or method of displacement of a heat transfer fluid that, in the context of radiators and heating, refers to the ability of a fluid to rise or fall inside a narrow space such as a small tube or channel. In the field of heating, this phenomenon is used to move a heat-carrying liquid, usually in the form of water, within the heating system.

Heating systems often contain capillary tubes or channels that allow the heat transfer fluid to move up and down of its own accord depending on temperature changes. During heating, the heat transfer fluid, which is warmer, can rise through capillary tubes to radiators or heating elements, where it transfers heat to the air. Then the cooling liquid returns to the lower part of the system, where it can heat up and rise again.

This phenomenon uses the natural process of heat-carrying fluid movement and enables efficient heating without the need for an external pump. Capillary tubes or channels can also be placed in other areas, such as heat transfer panels or pipes, where heat needs to be transferred.

The advantage of using capillary movement in heating systems is that it does not require mechanical pumps or other devices to move the heat-carrying liquid. This can mean energy savings and lower maintenance of the heating system