HEAT EXCHANGER Russian patent published in 2010 - IPC F28D7/10 

FIELD: heating systems.

SUBSTANCE: invention refers to heat engineering and can be used as module of small-sized heat exchanger included in steam-generating nuclear power plant operating on liquid-metal heat carrier in variable load mode. Heat exchanger contains vertical tubes installed coaxially and with annular gaps relative to each other, internal one of which is attached to intermediate and external tubes by means of upper and lower reducers so that a bank is formed and attached to tube sheet by means of one of its tubes; at that, reducers are provided with overflow channels, the first ones of which are connected with a gap between intermediate and internal tubes, and the other ones- to cavity of the latter and with a gap between external and intermediate tubes; bank is attached to tube sheet by means of its internal tube, and channels of upper reducer are made in longitudinal and transverse direction respectively in relation to tubes of the bank.

EFFECT: improving reliability of heat exchange design in conditions of high temperature drops of heat exchange liquid and their hydraulic turbulent parametres, as well as heat exchange intensity owing to increase of heat removal during operation.

3 dwg