Micro-channel oscillatory flow heat pipe heat exchanger

Abstract

The invention discloses a micro-channel oscillatory flow heat pipe heat exchanger used for forced-convection heat transfer. The micro-channel oscillatory flow heat pipe heat exchanger is divided into an evaporation section, a condensation section and a heat insulation section, wherein the outer surface of the heat insulation section needs to be wrapped with a heat preservation material, and the evaporation section and the condensation section are automatically arranged according to use scenes; a main body of the heat exchanger is a snakelike pipeline formed by repeatedly bending a flat pipe in parallel around a first direction and a second direction, and the head end and the tail end of the snakelike pipeline are connected to a filling opening; a plurality of micro-channels are arranged in the flat pipe; the snakelike pipeline comprises a plurality of U-shaped elbows, two 90-degree elbows, a plurality of vertical straight sections and a horizontal straight section; and the vertical straight sections are parallel to each other and have the same distance, and a plurality of groups of fins are arranged in the height direction of the vertical straight sections. According to the micro-channel oscillatory flow heat pipe heat exchanger, the multiple micro-channel oscillatory flow heat pipes can be connected in parallel to improve the heat exchange amount of the heat exchanger, heat transfer is further enhanced by additionally arranging the fins, and the problem that an existing oscillatory flow heat pipe heat exchanger is small in heat exchange amount is solved.

Description

technical field [0001] The patent of the invention relates to technical fields such as gas-liquid two-phase flow, heat and mass transfer, waste heat recovery and utilization, heat dissipation of electronic components, space heat control, and efficient heat transfer. Specifically, it is a microchannel oscillating flow heat pipe heat exchanger. Background technique [0002] The oscillating flow heat pipe is a new type of heat dissipation element with high-efficiency heat transfer capability. Usually, it is a serpentine pipeline formed by repeated bending of slender capillaries, and its working process can be expressed as an unsteady two-phase oscillating flow phase change heat transfer process in a small space. Since the diameter of the pipe is small enough, after the pipe is evacuated and filled with working fluid, the working fluid will form randomly distributed vapor-liquid plungers under the action of surface tension and gravity. When the evaporation section of the oscill...

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Problems solved by technology

When the hydraulic diameter of the channel reaches 0.5 ~ 1mm, the convective heat transfer coefficient can be increased by 50%, but the size of the micro oscillating flow heat pipe is too small, so that the increase of the heat transfer coefficient has little effect on its heat transfer, and it cannot be improved by adding fins. To enhance heat transfer, which largely limits the application of micro-oscillating flow heat pipe heat exchangers

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