module monotermico and bitermico for condensing boilers murals

摘要

Heat exchanger for condensing boiler providing a plurality of elliptic section pipes (1) in aluminium or stainless steel placed on two or more files and closed inside a plurality of thermic plates (2), said plates in aluminium or stainless steel distanced from each other with constant step. Said plates (2) are brazed welding onto the elliptic pipes (1) so forming with them the mixed thermic exchange surface, wet/dry, of the central part (3) of thermic exchange of the unit. In the upper part of the unit two elliptic pipes (4, 5) are present that form the side wet walls of cooling of the combustion chamber, hi the lower part of the unit are present a series of circular section pipes (7) that go to determine, inside the smoke chamber (8), the condensation zone for the recovery of the latent heat of the smokes before the outlet (9) toward the exhaust of the stack. The water crosses the unit in the opposite direction to the smokes direction.