TUBULAR HEAT EXCHANGER Russian patent published in 2011 - IPC F28D7/00 

FIELD: machine building.

SUBSTANCE: heat exchanger consists of cross flowed profiled pipe bundle in form of three diametrically tied round cylinders where central one has bigger diametre d₁ and two other similar cylinders have less diametre d₂ and are conjugated with central cylinder in front and back parts by triangular design. Also, the heat exchanger has collectors with tube plates. Owing to the design of tubes of different cylinder profile a flow of heat carrier successively streams arranged downstream cylinder parts (elements) of heat exchanging tubular surface of bigger diametre d₁ and coupled cylinder parts of less diametre d₂ between them. Also, conjugated back and front parts of less diametre d₂ of each pipe of a lengthwise row are arranged symmetrically relative to axis of transverse row of pipes passing through centres of parts of bigger diametre d₁. The flow moves sinuously in tube space of the bundle. The above described design of profiled pipes facilitates direct and back rational detached flow.

EFFECT: raised efficiency of pipe surface heat transfer, reduced specific quantity of metal and reduced volume of heat exchanger.

5 dwg