HEAT EXCHANGER Russian patent published in 1997 - IPC

FIELD: heat-power engineering. SUBSTANCE: heat exchanger contains two tube sheets 1 and 2 and tubes 4 for separation of two heat-exchange media 5 and 6 which are tightly secured in cylindrical holes of tube sheets 1 and 2; their ends enter heat-transfer agent chambers 9 and 10. Ends of metal tubes 4 have bevel whose planes are directed to inlet 7 and outlet 8 of chamber 9 and 10. Bevel angle of each tube 4 reduces from periphery of chambers to their center. Tube sheets 1 and 2 consist of two layers with elastoplastic material 3 located between layers. To enhance tightness of structure, each layer of tube sheets 1 and 2 is convex, their convexity being directed towards elastoplastic material 3. EFFECT: smooth distribution of heat- transfer agent among tubes at low hydraulic resistance. 2 cl, 2 dwg