Novel flow-channel plate-fin type heat exchanger

Abstract

The new flow channel plate-fin heat exchanger adopts a new flow channel, mainly including fins, partitions, and deflectors. Each unit is welded together by vacuum brazing. The fin type in the heat exchange section mainly adopts new Fins, in order to make the pressure of the fluid inside the plate-fin heat exchanger higher than that of the traditional channel structure, to improve the fluid turbulence performance and the turbulent dissipation rate higher than the traditional structure, a new channel structure is adopted in the new channel structure Medium; due to the change of the channel structure, the turbulent dissipation rate of the fluid in the channel is greatly enhanced. Compared with the traditional channel structure, the average value of the turbulent dissipation rate at the inlet increases by 8.1 times, and the turbulent dissipation rate at other positions Both are greatly increased, and the heat dissipation effect is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, in particular to a plate-fin heat exchanger. Background technique [0002] Plate-fin heat exchangers usually consist of partitions, fins, seals, and deflectors. Fins, deflectors and seals are placed between two adjacent partitions to form an interlayer, which is called a channel. Such interlayers are stacked according to different fluid methods and brazed into a whole to form a plate bundle. The plate bundle is a plate. The core of the finned heat exchanger. Plate-fin heat exchanger has the advantages of compact structure, large specific surface area, high heat transfer efficiency, multi-stream heat exchange and secondary heat transfer, etc., so it has attracted more and more attention from experts and scholars at home and abroad. The fin is the main heat exchange unit of the plate-fin heat exchanger, and the flow channel structure formed by the fin plays a key role in the heat transfer...

AI Technical Summary

Problems solved by technology

Since the fin structure constituting the flow channel of the plate-fin heat exchanger is in the shape of a long sheet, in order to improve the heat exchange effect of the heat exchanger, the traditional fin structure needs to be improved. However, only from the thickness, height and heat transfer Although the improvement of the length of the flow channel in three aspects can increase the heat transfer capacity of the heat exchanger to a certain extent, the improved heat exchanger is not conducive to transportation and installation due to its bulky size and heavy weight.

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