HEAT-EXCHANGE MACHINES

摘要

The invention is designed for application in heat engineering and can be used in heat exchange machines with ribbed tubes. In the heat exchange machine the ribbed heat exchange tube with d diameter is made in the serpentine form with external ribbing diameter D and L1 ribthickness located with L2 spacing, upon that the amplitude of A serpentine to external ribbing diameter is not less (I), wave period of P serpentine P is not less than (II). Ribbing of the serpentine-formed tube represents rings, vanes, pins, spiral tape, elliptical plates. In cross section the ribbing has a form of rectangle, trapeze. Upon that the ribbing of the serpentine-formed heat exchange tube can be located at the tube wall in parallel to each other and perpendicularly to the tube axis as well as ribbing can be made by welding of the ribbing element to the external surface of the tube and extrusion from the wrought metal layer applied to the external tube surface. Technical result: intensification of heat exchange due to turbulence of flow passing inside the ribbed serpentine-formed tubes and increase of heat exchange area of the machine.