D-shaped cross section Zig-Zig channel compact heat exchanger

Abstract

The invention relates to a D-shaped cross section Zig-Zig channel compact heat exchanger. The Zig-Zig channel compact heat exchanger comprises a cold fluid inflow and outflow port, a hot fluid inflowand outflow port and a heat exchange core, wherein the heat exchange core comprises a cold side plate and a hot side plate which are made from a titanium or titanium alloy material, multiple parallelZig-Zig channels provided with D-shaped cross sections and used for a fluid to pass through are etched on the cold side plate and the hot side plate respectively, the cold side plate and the hot sideplate are parallel, are alternatively arranged in an overlapped mode and are connected through a diffusion welding technology to form a whole, the cold side plate and the hot side plate are differentin thickness, the cold side Zig-Zig channels and the hot side Zig-Zig channels are different in cross section area, and the cold side Zig-Zig channels and the hot side Zig-Zig channels are different in rib width. The D-shaped cross section Zig-Zig channel compact heat exchanger has the characteristics of a high temperature and pressure resistant and corrosion resistant severe environment. The effective utilization rate of plate piece area is improved, and the compactness of channel arrangement is improved. The channel resistance loss is reduced, and the whole heat exchange performance is improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of high compactness heat exchangers used in floating natural gas installations, offshore platforms and new-generation nuclear energy fields, and particularly relates to a D-section Zig-Zag channel compact heat exchanger. Background technique [0002] High-compact heat exchangers used in floating natural gas installations, offshore platforms, and new-generation nuclear energy fields are mainly plate-fin heat exchangers. The plate-fin heat exchanger is mainly composed of the base plate and the fins by brazing. The problems of this heat exchanger are: the brazing part is welded by dissimilar materials, and the thermal expansion stress under high temperature conditions can easily lead to internal deformation failure; In a highly corrosive environment, the filler solder at the brazing joint is easily corroded, resulting in leakage; thinner fins are prone to creep under high temperature and high pressure, thereby ...

AI Technical Summary

Problems solved by technology

The plate-fin heat exchanger is mainly composed of the base plate and the fins by brazing. The existing problems of the heat exchanger are: the brazing part is welded by dissimilar materials, and the thermal expansion stress under high temperature conditions easily leads to internal deformation and failure; In a highly corrosive environment, the filler metal at the brazing joint is easily corroded, resulting in leakage; thinner fins are prone to creep under high temperature and high pressure, and then block some channels, reducing heat transfer efficiency and safety; heat exchangers Plate materials are all made of stainless steel, and stainless steel is easily corroded in seawater environment, resulting in plate leakage; the triangular cross-section, rectangular cross-section, and trapezoidal cross-section of the heat exchanger flow channel are made by mechanical processing, and the processing cycle is long and It is difficult to guarantee the level of surface roughness; heat exchangers with straight channels, sinusoidal channels, and "ji"-shaped channels have problems of low heat transfer efficiency and low effective utilization of area

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