METHOD FOR ENHANCING THE EFFICIENCY OF HEAT-EXCHANGE APPARATUS AND HEAT-EXCHANGE APPARATUS REALIZING THE METHOD Russian patent published in 2005 - IPC

FIELD: heat-exchange apparatuses for gaseous heat-transfer agents, whose temperature, pressure and flow rate in service may vary within a wide range.

SUBSTANCE: the method consists- in heat transfer by means of fins separating the flow-through cavities of each heat-transfer agent into parallel-connected ducts, and plates separating the adjacent flow-through cavities of different heat-transfer agents; - intensification of heat exchange of the heat-transfer agent with the fins washed by it at flowing agent with the fins washed by it at flowing of heat-transfer agents through the parallel-connected ducts of the respective flow-through cavity due to the flow of the heat-transfer agent through the perforated holes in the fins between the adjacent parallel-connected ducts as a result of fluctuation of static pressure differentials in the ducts, or at a regular destruction of the boundary layer of the heat-transfer agent in the joints of the fin sections located in succession in the direction of flow of the heat-transfer agent; - limitation of flow of the heat-transfer agent between the parallel-connected ducts of the flow-through cavity through the fin perforation holes or in the joints of the non-perforated fin sections located in succession in the direction of flow of the heat-transfer agent, to this end, the flow of the heat-transfer agent in the flow-through cavity is separated into several flows separated from one another. The heat-exchange apparatus includes: - alternating flow-through cavities of cooling and cooled heat-transfer agents formed by the separating plates of heat-conducting material; - flow-through cavities of both heat-transfer agents separated into out-of-round in cross section parallel-connected ducts by the respective fins of heat-conducting material being in a heat contact with the separating plates; - fins in each flow-through cavity, even of one heat-transfer agent, perforated or staggered in the direction of its motion with formation of several successively located sections of parallel-connected ducts so that the fin in the second and the subsequent in the direction of flow of the heat-transfer agent sections is shifted across this direction relative to both fins of the previous section making up the duct just before the shifted fin, the ducts between the fins with the adjacent sections are of a different length; -each of the flow-through cavities of the heat-transfer agent with the sections of the adjacent ducts of a different length separated by impermeable alls into several parallel-connected sections.

EFFECT: reduced weight and cross-section dimensions of the heat-exchange apparatus characterized by a sufficiently high heat transfer within a wide range of temperates, pressures and flow rates of heat-transfer agents.

3 cl, 7 dwg