INFRARED INDUSTRIAL HEATERS : CARBON

Infrared Heating Technology

Infrared heaters transmit large amounts of energy in a short time and at high efficiency. The wavelength of the infrared radiation has a crucial effect on the effectiveness of the heating process. Infrared heaters, which are optimally matched to the materials to be heated, provide energy savings of up to 50%. Heraeus infrared heating technology offers significant advantages: heat exactly where it is needed, with the optimum wavelength for the product and in line with the process. Click HERE for information on standard models.

High heating efficiency and rapid cool down make the mediumwave infrared carbon heater from Heraeus the only medium-wave heater to offer you shortwave response times. Suitable for all medium-wave applications, this heater also offers the capability to match temperatures to the optimum absorption wavelength for each application. Together, these features eliminate overheating and contamination of sensitive substrates.

A particular large portion of medium wave radiation is absorbed in water, solvents and plastics and converted into heat. This allows significant benefits: carbon heaters dry printing inks, with less stress for the paper because the radiation acts more intensively on the ink. The high power heater increases print drying speed and reduces drying time. It also heats plastics in a targeted manner, with less heating of the surrounding environment.

1. Various types of infrared heaters have different maximum output at different wavelengths – Halogen IR heaters at 1 µm, Carbon heaters at about 2.5 µm. Therefore at 3 µm the High Power Carbon heater provides three times the irradiance of a Halogen heater. Click here to see graph
   
   
2. Only that part of the spectrum which covers the absorption curve of water is effective for the drying process – not the whole infrared radiation. The infrared radiation of the Carbon heater is almost ideally matched to the absorption spectrum of water. In comparison, only a small fraction of short wave radiation covers the absorption curve. In other words, the greater part of the energy of short wave infrared radiation is wasted.
   Click here to see graph
   
   
3. The result is: A short wave heater at the same power density supplies less than 50 % of the power of a carbon heater in drying processes. For example, at an irradiation of 120 watts/in², the effective power density of a carbon heater is around 28 watts/m²; that of a short wave heater is around 14 watts/in².

THE CARBON TWIN HEATER: A New Generation

The new generation of proven Heraeus twin tube heaters is the Carbon Twin. Its maximum power density is twice that of conventional twin tube heaters, perfect for

• fast drying of waterbased inks and coatings,
• economical processing of plastics and glass.

Twin tube carbon heaters can be easily retrofitted into existing infrared systems. They replace the existing heaters, improve the system and decrease the running costs.

In the medium wave range, Heraeus offers tailor-made twin tube heaters or carbon round tube heaters of especially high efficiency. New is the unique combination of both of these technologies, which allows important synergy effects.

Common to both types of heaters is the medium wave spectrum. Many materials absorb infrared especially in this region of the spectrum. The use of infrared heaters therefore contributes to the accelerated drying of water and other solvents and to economical processing of plastics and glass.

The proven twin tube heaters bring their high stability to the carbon twin, as well as a significantly increased radiation density. In addition, they offer the possibility of manufacture in a range of models and the heaters can be connected to conventional standard power supplies.

View a chart comparing Twin Tube Carbon Infrared Heaters with other heater types

The carbon heater technology contributes to the high power density of the carbon twin. Carbon heaters have twice the maximum power density of conventional medium wave twin tube heaters. In addition, carbon heaters have fast heat-up and cool-down times and can be switched on and off in seconds.

• medium wave, 1200 °C, peak wavelength 2 µm
• max. power density 95 watts/in 2 (carbon round tube 65 W/in 2 , medium wave twin tube 30 W/in 2 )
• linear power density 180 W/in.
• switch on and off times of only 1 or 2 seconds
• conventional voltages
• twin tube format 33 x 14 mm
• lengths up to 120 inches
• gold plated
• one- or two-sided connection
• Standard, custom and OEM models available

For application solutions employing this technology, see Modular Systems for standard and custom designed heating units.

 

Page Tools

Download PDFs
Read FAQs
Read Case Studies
Print this Page