HEAT EXCHANGER Russian patent published in 2020 - IPC F28D7/00 F28F9/22 F28F17/00 

FIELD: machine building.

SUBSTANCE: invention relates to power and transport machine building mainly to refrigeration and cryogenic engineering and can be used in heat exchangers for cryogenic fuels evaporation for gas turbine engines. In heat exchanger containing inlet header, in which partition is arranged, which divides it into compartments, controlled shutoff element at input to input collector and heat exchange channels between collectors, part of which is interconnected with one compartment of inlet collector, and the rest part with the other, when redistribution of the pipe medium flow rate along the adjacent heat exchange channels, the latter are installed in one row and adjacent ones are interconnected with different compartments of the input collector, each of the compartments is equipped with an inlet branch pipe communicated with the pipe medium inlet, and the controlled shutoff element is located on one of these nozzles. Invention is also in that the heat exchanger distance S between the outer walls of the heat exchange channels adjacent to the outlet of the inlet header larger than the distance S_out between outer walls of adjacent heat exchange channels at the inlet to the outlet header, and that distance S between external walls of adjacent heat exchange channels at the outlet of the inlet header in the range of external diameters d=10-70 mm of adjacent heat exchange channels is S≥d ⋅ (0.923 / lg d).

EFFECT: prevention of clogging with ice of external inter-channel space between adjacent heat exchange channels, ice fusion into a single plate on external surfaces of heat exchange channels, which increases efficiency of heat exchanger operation in all modes of gas turbine engine operation by reducing freezing.

3 cl, 3 dwg