Micro-channel phase change heat transfer test stand and micro-channel phase change heat transfer test platform

Abstract

The invention discloses a micro-channel phase change heat transfer test stand. The test stand comprises a base, a channel, temperature measuring holes and a transparent cover plate, wherein a groove is formed in the base, the two ends of the groove are higher than a first boss and a second boss, and the first boss and the second boss are formed in the center of the groove; the channel is embedded into the center of the groove in the base, and a first rectangular groove ring is arranged around the portions, on the bottom face of the groove, the opposite side faces of the first and second bosses and the top faces of the first and second bosses, of the micro-channel; the temperature measuring holes are vertically formed in the side face of the base according to the temperature gradient and horizontally formed in the side face of the base at equal intervals; the shape of the side, facing the groove, of the transparent cover plate is closely matched with the groove in the base, a second rectangular groove ring corresponding to the first rectangular groove ring is arranged on the transparent cover plate, and gaskets are arranged in the rectangular groove rings respectively. According to the test stand, the channel is closely sealed, and fluid change is stable and visible in the phase change process of a refrigerant; the temperature measuring holes are vertically formed in the side face of the base according to the temperature gradient and horizontally formed in the side face of the base at equal intervals, so that the heat transfer path is avoided from being blocked, and the measuring result is more accurate.

Description

technical field [0001] The invention relates to the technical field of microchannel phase change heat transfer characteristics, and more specifically, the invention relates to a microchannel phase change heat transfer experiment platform and a test platform. Background technique [0002] Microchannels play an important role in the miniaturization process of modern science and technology, and have innovative academic significance and application value for understanding the heat and mass transfer mechanism of microstructures. Microchannel heat exchangers are widely used in the fields of micro heat pipes, electronic chip heat dissipation, carbon dioxide refrigeration systems, sensor cooling, aerospace, diode laser beams, chemical reactors, etc. Therefore, research on condensation in microchannels is of great value and significance. In recent years, scholars at home and abroad have studied the laminar forced convection of water in silicon microchannels, the heat transfer charac...

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Problems solved by technology

In recent years, scholars at home and abroad have studied the laminar forced convection of water in silicon microchannels, the heat transfer characteristics of water in trapezoidal silicon microchannels, etc. There are more studies on water in microchannels, but relatively few studies on refrigerants. less, the refrigerant is more likely to leak than water, and the seal is more difficult; in the traditional temperature measurement process, there are temperature measurement points inside the microchannel, which will block the heat transfer path and affect the test results; and the refrigerant During the phase change process, the fluid change is unstable, and the measured thermal characteristic parameters of the phase change have large errors; the current test system used in the test process is difficult to control the flow and state of the refrigerant, and it cannot guarantee that the cooling system flows into the microchannel. The state at the entrance of the phase change heat transfer test bench has an initial state and is relatively stable, resulting in a large error in the experimental results

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