STUDY OF LOCAL EXERGE LOSSES IN THE AIR HEATER OF THE HEAT RECYCLING SYSTEM OF A BOILER INSTALLATION

The efficiency of heat recovery equipment of boiler plants is determined by the level of exergy losses in its elements. Local exergy losses associated with heat transfer and hydrodynamic resistance during the movement of coolants in the air heater of the heat recovery system of a boiler plant were studied. The patterns of influence of the heat output of the air heater and heat transfer coefficients on exergy losses in the air heater have been established. The greatest exergy losses in an air heater are associated with heat transfer from the wall to the air. The area of the main characteristics of the air heater has been determined, within which the minimum level of exergy losses is ensured.