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Air Heaters - Continued.
Rothemuhle Air Heater
A Rothemuhle air heater is a regenerative type of air heater. This type of air heater uses stationary surface elements and rotating ducts. The surface elements are supported and contained within a stationary cylindrical shell called the stator.
The rotating element (a rotating hood) alternately passes over a heating element, which is heated by the flue gas. Usually combustion air flows through the rotating hood. As the hood rotates, it forces the combustion air to flow through sections of the heated element. This causes the combustion air to get heated.