Novel vertical titanium alloy micro-channel inner spiral tube-sheet heat exchanger

Abstract

The invention relates to a vertical titanium alloy micro-channel inner spiral tube-sheet heat exchanger, and belongs to the technical field of energy. The invention discloses a vertical titanium alloy micro-channel plate heat exchanger with supercritical nitrogen and nitrogen as circulating heat exchange working media. Heat exchange plates of the heat exchanger can be stacked at will, and the heat exchanger is composed of four symmetrical parts, so that the four coil pipes can be combined at will according to the structure to be used in a smaller space; cold and hot fluid flows into the heat exchange plate with a double-layer coil bundle and is guided by a coaxial spiral blade to form inner vortex flow, the upper-layer coil and the bottom-layer coil are coiled in the same direction, and the two layers of coils are connected through a coil interlayer torsion connecting elbow to change the arrangement position of the internal pipe bundle; and all parts in the heat exchanger are subjected to male die diffusion welding. The vertical titanium alloy micro-channel plate heat exchanger has higher power-to-weight ratio and high pressure resistance, has lower liquid leakage possibility than a conventional plate heat exchanger, is firmer and more stable in structure and higher in heat exchange performance, can be more flexibly applied to a small space due to the unique symmetrical assembly structure, and is lower in cost.

Description

technical field [0001] The invention relates to the field of energy technology, and relates to a plate heat exchanger, in particular to a novel vertical titanium alloy microchannel internal spiral tube plate heat exchanger. Background technique [0002] With the development of industries such as aerospace, shipbuilding and energy, traditional heat exchangers have been unable to meet the requirements of the above-mentioned fields for the working temperature, pressure and power-to-weight ratio of heat exchangers. Compared with traditional heat sinks, micro-channel heat sinks can meet the above requirements, and also have the characteristics of compact structure, large heat exchange area per unit volume, and high heat exchange efficiency. Compared with other heat exchangers, the plate heat exchanger has higher heat transfer coefficient, lower cost, smaller footprint and lighter overall weight, and the interior can be freely combined with different structural types of plates. S...

AI Technical Summary

Problems solved by technology

Although the microchannel plate heat exchanger is better sealed by 3D printing technology, its production cost is high, the yield rate is low, and the overall structure is single, so it cannot be applied to various small spaces.

The processing level of domestic nickel-based alloys is generally backward, and the price fluctuates greatly. Compared with titanium alloys, it lacks low-temperature toughness and fracture toughness.

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