What is Far Infrared radition to?
All meterials more than absolute zero (-273°C) radiate energy of the far infrared region. The higher the temperature, the higher the radiation dose (energy) is. It is known that the amount of radiation in same temperature is affected by the material itself and the condition of its surface. Ceramic materials are known to radiate a lot of far infrared rays. The radiation of far infrared rays is low in metal, however metal reflects it well. Therefore metals are used as a reflector with high reflectance.
In general, the heat moves from higher temperature to lower temperature. Heating by radiation warms the object more evenly, than with convection. Therefore, the temperature on the objects’ surface is always much warmer than in the inside, when heating is done with conduction.
When the wavelength of the radiation is controlled, is the need for energy usually less, than the corresponding heating with heaters based on conduction. Furthermore – FIR penetrates deeper into receiving material.
FIR’s ”Far Infrared Ray´s” are specific wave-lengths of light from the sun. Over half of the sun’s energy is radiated in the wavelength area of FIR. FIR waves are the safest and the most beneficial of the sun’s waves.
“Radiant heat” is neither ultraviolet radiation nor atomic radiation.
“Radiant heat” is a form of energy that heats objects directly through a process called “conversion” without having to heat the air in between;
”Radiant heat” is also known as infrared energy-IR;
Heat can transform in (3) three different ways:
Conduction – Transfer of energy between objects that are in physical contact.
Radiation – The transfer of energy to or from a body by means of the emission or absorption of
electromagnetic radiation. Thermal radiation is energy emitted by matter as electromagnetic waves.
Convection – The transfer of energy from one location to another as a side effect of physically moving an object containing that energy.
Thermal radiation propagates without the presence of matter through the vacuum of space. Warming effect in the heaters that use FIR- technology is based specifically on the radiation – not on the conduction. In everyday life Thermal radiation can be sensed well in sunny weather – in the sunlight it is warmer than in the shade, but the air has the same temperature in both cases.
The infrared segment of the electromagnetic spectrum is divided into three segments by wave length, measured in microns or micrometers (a micron = 1/1,000,000 meter);
076-1.5 microns = near or close;
1.5-5.6 = middle or intermediate;
5.6-1000 = far or long-wave infrared.
The infrared segment of the electromagnetic spectrum occurs just below or “infra” to red light as the next lowest energy band of light. This band of light is not visible to human eyes but can be seen by special cameras that translate infrared into colors visible to our eyes. However, we feel this type of light, perceived as heat.
The sun creates most of its energy within the infrared segment of the spectrum. Our atmosphere has a “window” in it that allows FIR ”Far Infrared Ray” rays in the 7-14 micron range to safely reach the earth’s surface. When warmed, the earth radiates infrared rays in the 7-14 micron band and has a peak output at 10 microns.
The infrared heat in a green house is just like the heat from our sun or that which our own bodies produce as they burn fuel to keep us warm. Supposedly, bodily tissues needing a boost in their output selectively absorb FIR rays. The internal production of infrared energy that normally occurs within our tissues is associated with a variety of healing processes.After boosting a tissue’s level to maximum, the remaining rays pass onward harmlessly. This phenomenon is called “resonant absorption.”
Warming with FIR- radiation
FIR produces thermal radiation, which is sensed in our body as “Deepwarmth”. Warming effect on human body lasts longer, than when warming with a conducted warm, because the ”Deepwarmth” heats blood circulation and muscles.
– FIR heat feels cozy – the surface of the heating element does not get too hot
– FIR energy efficiency is good
– FIR- radiation is used for warming e.g. in infrared heating lamps and in maternity ward in incubators