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Do You Know About Air Heaters?
Table of Contents
This article will introduce professional knowledge about air heaters and some sub-product classifications of air heaters.
Air Heater Introduction
Air heaters, also known as air preheaters, are widely used heating elements among various heating components. They are typically composed of pipes or ducts, which allow air to flow over or through a heat source. This design often includes fins or other surfaces to increase the heat transfer area.
Practical Example: Consider fans and blowers. In these systems, air is forced to pass through the surface of the air heater, gaining heat in the process. The efficiency of heat transfer is a key factor in the design and operation of air heaters.
Types of Air Heaters:
Direct Fired Air Heaters: These heaters burn fuel directly to heat the air. They are highly efficient but can introduce combustion by-products into the airflow.
Indirect Fired Air Heaters: These use a heat exchanger to separate the combustion process from the airflow, making them suitable for situations where clean air is crucial.
Applications of Air Heaters:
In power plants, air heaters preheat the air used for combustion in boilers, improving efficiency and reducing fuel consumption.
In industrial processes, air heaters are used for drying, curing, or heating materials.
Advantages of Air Heaters:
They enhance the efficiency of heating processes.
They reduce fuel consumption and emissions in combustion processes.
They offer versatility in using different heat sources and fuels.
Considerations:
Maintenance is crucial for both efficiency and safety.
The design must account for the type of air (clean, dusty, corrosive, etc.) and the required temperature rise.
Air Heater Related Products
There are many models of air heaters, and these different models are used in different places. Next, I will show you some of the more common products and some of their data, which can give you some understanding.
Air heating elements for air fryers
| Sheath Material | AISI 304/304L/321/309S/316L; Incoloy 800/840 |
| Heating Wire Materia | FeCrAl/NiCr |
| Sheath Diameter | 6.25/6.5/8/8.5mm |
| Sheath Length | Max.3000mm |
| Sheath Temperature | Max.927℃ |
| Power | Max.3000W |
| Power Density | Based on air speed |
| Voltage | 100-240V |
| Working Condition | Ventilated air |
Air heating elements for baking pans
| Sheath Material | AISI 304/304L/321/309S/316L; Incoloy 800/840 |
| Heating Wire Materia | FeCrAl/NiCr |
| Sheath Diameter | 6.25/6.5/8/8.5mm |
| Sheath Length | Max.3000mm |
| Sheath Temperature | Max.927℃ |
| Power | Max.3000W |
| Power Density | Max.8W/cm2 |
| Voltage | 100-240V |
| Working Condition | Ventilated air |
Air heating elements for pizza ovens, commercial air drying systems and hot air ovens
| Sheath Material | AISI 304/304L/321/309S/316L; Incoloy 800/840 |
| Heating Wire Materia | FeCrAl/NiCr |
| Sheath Diameter | 6.25/6.5/8/8.5/10/12.5mm |
| Sheath Length | Max. 7000mm |
| Sheath Temperature | Max.927℃ |
| Power | Customized |
| Power Density | Based on air speed |
| Voltage | 100-480V |
| Working Condition | Ventilated Air |
Air heating elements for clothes dryers
| Sheath Material | AISI 304Ni-Di/309S/321; Incoloy 800/840 |
| Heating Wire Materia | FeCrAl/NiCr |
| Sheath Diameter | 6.25/8.5mm |
| Sheath Length | Max. 1200mm |
| Sheath Temperature | Max. 870℃ |
| Power | 600-3200W |
| Power Density | Max.12W/cm2 |
| Voltage | 200-400W |
| Working Condition | Ventilated Air |
Conclusion
Air heaters are heating elements that are often used in daily life, and are also used in many processes in industry.
After reading this article, you should have some basic knowledge about air heaters.
If you would like to know more about industrial or household air heating elements please contact us.
