Infrared versus Microwaves?
Infrared (IR) lies between visible light and microwaves in the electromagnetic spectrum. As an alternative to hot air, the high operating temperatures generated by infrared heat (up to 1500 deg F or 815 deg C) may be used to remove moisture from the surface of a product while keeping it brown or crispy. This is particularly useful in such applications as drying or baking in the food industry. When IR is used in low power mode in combination with microwave heating, it is possible to reduce the microwave power input to lower surface moisture and improve product quality. Conversely, high penetration of IR can actually increase surface moisture levels. IR heating can be produced using either gas fired or electric powered generators. With either system, a disadvantage of IR is the high cost of energy compared to other types of heating, including microwaves. A second issue is that the glass IR tubes are not always acceptable in many process applications.
Infrared (IR) lies between visible light and microwaves in the electromagnetic spectrum. As an alternative to hot air, the high operating temperatures generated by infrared heat (up to 1500 deg F or 815 deg C) may be used to remove moisture from the surface of a product while keeping it brown or crispy. This is particularly useful in such applications as drying or baking in the food industry. When IR is used in low power mode in combination with microwave heating, it is possible to reduce the microwave power input to lower surface moisture and improve product quality. Conversely, high penetration of IR can actually increase surface moisture levels. IR heating can be produced using either gas fired or electric powered generators. With either system, a disadvantage of IR is the high cost of energy compared to other types of heating, including microwaves. A second issue is that the glass IR tubes are not always acceptable in many process applications. 9. What’s the limit of irradiated pow
