ADAPTER Russian patent published in 2011 - IPC F28D7/10 

FIELD: heating.

SUBSTANCE: invention relates to the field of thermotechnics and can be used in adapters of heat exchange element of type "pipe in pipe" when changing the hydraulic circuit of movement of heat-exchanging fluids of in the heat exchanger of nuclear power (NPP), working on liquid-metal coolant in the mode of variable current sinks. In the adapter, comprising a body in the form of a socket with parallel channels, an edge for connecting pipes, and forming with the last a heat exchanger element of type "pipe in pipe", one of the parallel channels in a cross-section of paths adapter area is made with a square of cross-section equal to area of passage section of each of the pipes joined back to back to the edges of the adapter, the area of the passage section of another parallel channel is equal to the square of cross-section of tubular annulus formed by the inner and outer tubes, at that both parallel channels are aimed at the same angle to the main axis of the heat exchanger element.

EFFECT: design of the proposed adapter enables to increase reliability of work of the heat exchanger element of type "pipe in pipe" on a plot of the phase transition of the heated medium due to changing the hydraulic circuit of heat transfer and, therefore, to exclude the critical values of thermal cycling stresses.

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