HEAT EXCHANGING APPARATUS Russian patent published in 2000 - IPC

FIELD: tubular heat exchanging apparatuses for heating residence buildings, heating gas agents, in different type furnaces including baking ones. SUBSTANCE: heat exchanging apparatus includes fire box, burner and gas duct system having mutually communicating, hollow parallel heat exchange tubes arranged by several horizontal rows placed in different levels. In cavity of each tube along its lengthwise axis and with gap relative to its wall turbulence inserts are mounted with equal pitch whose value is no more than two diameters of tube. The last insert is spaced by pitch value from tube outlet. Turbulence inserts are in the form of discs; relation of diameter of each heat exchanging tube to disc diameter is in range 1.5-2.5. Discs are arranged in cavity of each tube on rigidly fixed rod passing along tube axis. EFFECT: increased factor of heat transfer due to intensified heat radiation from combustion products to heated medium, reduced energy consumption of apparatus. 4 cl, 2 dwg