Mode of operation of the air preheater is in counter flow, co-current flow, co-current flow-countercurrent or cross-countercurrent or cross-co-current flow. The design of the device is depend on the media and the temperature conditions of the application. For small construction, finned tubes are suited to arrange in a small space much heating surface. Is in the exhaust gas or in the air containing dust or other particles, so that deposits are expected, preferably smooth tubes are used, which are less prone to deposits and will be clean easier.
Working of Air Preheater
