METHOD FOR EFFICIENT HEAT EXCHANGE IN A HEAT EXCHANGER OF A CRYOGENIC INSTALLATION (VERSIONS) Russian patent published in 2020 - IPC F28D9/00 

FIELD: machine building.

SUBSTANCE: invention relates to power machine building and cryogenic systems, in particular to a method for excluding "freezing" of cooled heat carrier to surfaces of heat exchange in heat exchangers of cryogenic plants. Invention can be used in designing systems and installations for cryogenic support, when designing units of heat exchangers used in cryogenic installations for various purposes. In the method for efficient heat exchange in a heat exchanger included in a cryogenic plant and divided into at least three sections, providing for cooling of external heat carrier by means of indirect heat exchange with coolant of cryogenic plant at simultaneous indirect heat exchange between different temperature flows of refrigerant of cryogenic installation, introducing the external heat carrier by two separate flows into the first and third sections of the heat exchanger, forming the first cooling zone and the third cooling zone respectively, at the same time, cooling agent of cryogenic plant is introduced into second section of heat exchanging device, which forms the second cooling zone, cryogenic plant cooling medium is pumped from second cooling zone in series and counterflow to external heat carrier through third, second and first cooling zones, wherein the external heat carrier is cooled in the first cooling zone and in the third cooling zone by indirect heat exchange with parallel counter-flowing coolant flows, in addition, additionally cooling the cooling agent in the second cooling zone of the heat exchanging device by indirect heat exchange with the parallel unidirectional coolant flow of lower temperature, after that, cooled external heat carrier is removed from first cooling zone and from third cooling zone, heated coolant of cryogenic plant is withdrawn from first cooling zone. In compliance with the second version of the method of efficient heat exchange in a heat exchanger of a cryogenic plant, flows are organized: one coolant first flow, at least one coolant subsequent flow and one external coolant flow, besides, there is a flow of subsequent coolant flow between first coolant and external heat carrier flows. Introducing the external heat carrier flow into the heat exchange apparatus and introducing the first cooling flow into the heat exchanger counter-current, then flow of first coolant flow from heat exchange device is withdrawn and returned by next cooling agent flow between first coolant and external heat carrier flows, providing indirect heat exchange between different-temperature coolant flows, wherein the external heat carrier is cooled by indirect heat exchange with the subsequent coolant flow.

EFFECT: higher efficiency of heat exchange in heat exchanger of cryogenic plant.

2 cl, 3 dwg