Enhanced heat transfer resistance reduction energy-saving heat exchange plate for broken line type printed circuit plate heat exchanger

Abstract

The invention provides an enhanced heat transfer resistance reduction energy-saving heat exchange plate for a broken line type printed circuit plate heat exchanger. The enhanced heat transfer resistance reduction energy-saving heat exchange plate for the broken line type printed circuit plate heat exchanger comprises a heat exchange plate body with a plurality of broken line flow channels arrangedin parallel on the surface; and balance enhancing seams are processed at the bent corners of the broken line flow channels. The balance enhancing seams and the broken line flow channels provided by the invention are integrally machined and formed through a chemical etching process, therefore, the machining is easy, the structure is firm, and the economical efficiency is good; the balance enhancing seams can achieve low-speed jet flow among the flow channels, so that a backflow area is damaged, the heat transfer is enhanced, and meanwhile, pressure distribution in all the flow channels is moreuniform, flow distribution among all the parallel flow channels is more uniform, and therefore, the working medium pressure drop in the flow channels is reduced, and the efficiency of the heat exchanger is further improved; and meanwhile, the influence of the balance enhancing seams on the structural strength of the heat exchanger is small, so that the high pressure bearing capacity can be continuously kept.

Description

technical field [0001] The invention belongs to the field of heat exchange structures, and in particular relates to an enhanced heat transfer and drag reduction for broken-line printed circuit board heat exchangers in the field of engineering thermophysics, such as nuclear energy, aerospace, and chip cooling, where there is a strong demand for compact and efficient heat exchange equipment. Energy-saving heat exchange plate. Background technique [0002] Broken-line channel type printed circuit board heat exchanger (abbreviated as PCHE in English), has the characteristics of high compactness, small size, high structural strength, high heat exchanger efficiency, and high temperature and pressure bearing capacity. PCHE was originally used in the field of low temperature and refrigeration. Recently, with the requirements of energy conservation and emission reduction, many new concepts of energy conservation and emission reduction technologies have been proposed, such as solar en...

AI Technical Summary

Problems solved by technology

[0005] At present, the flow channel structure of the typical folded line channel type heat exchange plate formed by chemical etching is as follows: figure 2 As shown, this structure can increase the disturbance of the boundary layer and enhance the heat transfer capacity between the surface of the flow channel and the working fluid. The disadvantages of this structure are that the downstream reflow area at the bend increases the thermal resistance, affects heat transfer, and is uneven in the flow channel. The pressure distribution of the heat exchanger causes a large pressure drop

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