What is Radiance?
Directly from the Sun a natural, flexible and cheap heating way
In a lovely winter day, passing from a shade zone to a sunny one, we get an immediate feeling of warmness. This means that it is not the air, which has a constant temperature everywhere, that causes heating but it is rather the direct exposure to sunlight. This natural propagation of heat is called radiance and consists in the transmission of the long and soft waves of infrared rays contained in the spectrum of the Sun’s electromagnetic energy.
The properties of infrared rays are:
1. they are propagated in straight lines, in all directions and they are reflected only by some materials;
2. they propagate naturally in vacuum without no need of additional energy;
3. they are not absorbed by air;
4. they are absorbed by the solid bodies that transform them immediately into thermal power.
Radiance is today at heart of the most advanced air conditioning technologies.
Not only for the recent domestic radiant system for small environments, but for the most consolidated applications for the heating of large industrial areas. The emitting surfaces are hanged to the ceiling of the room to be heated, so that the floor, machines and persons to be heated are contacted directly and without dispersion. Depending on the area to be heated, the various heat emitters are distributed over the area so as to obtain uniformity in the heat flow.
Advantages of the radiant heating respect to the convection heating
In the same conditions of comfort, a radiant heating system offers the following advantages as compared to a convection system.
The CARLIEUKLIMA radiant systems generally have a low thermal inertia, which allows them to be brought up to full operating power quickly, thus reducing their operating times compared to a convection system.