Performance test device for micro heat exchanger

Abstract

The invention provides a performance test device for a micro heat exchanger, and belongs to the field of heat exchangers. The performance test device contains an experimental working medium return circuit and an electrical appliance control unit. The experimental working medium return circuit comprises a gas inlet pipeline, a pressure reducing valve, a one-way throttle valve, a flow meter, a pressure meter, a heat exchanger and a temperature detection system, wherein, one end of the gas inlet pipeline is connected with the inlet of the pressure reducing valve, the outlet of the pressure reducing valve is connected with the inlet of the one-way throttle valve, the outlet of the one-way throttle valve is connected with the inlet of the flow meter, the outlet of the flow meter is connected with the pressure meter, the other end of the pressure meter is connected with the gas inlet section of the heat exchanger, and the gas outlet section of the heat exchanger is directly communicated with atmospheric air; the heat exchanger consists of a test piece, a gas inlet, a gas outlet and a shell; and the gas inlet section, the gas outlet section as well as the upper surface and lower surface of the heat exchanger are equipped with temperature sensors for recording the temperature values of four test points. Tests prove that the heat exchange effect is obviously enhanced along with the increase of themicro heat exchange area; and meanwhile the heat exchange effect is strengthened along with the reduction of the equivalent diameter.

Description

technical field [0001] The invention relates to a heat exchange performance testing device for a micro heat exchanger, and uses a method for testing the heat exchange performance of the micro heat exchanger when gas is used as a refrigerant. Background technique [0002] Micro heat exchanger has the advantages of small size, large heat transfer area per unit volume, high heat transfer efficiency, and ultra-compact structure. Its characteristic size is between 100 μm and 1 mm, and it has been widely used in microelectronics, aerospace, medical, chemical and biological engineering. , and other occasions that have special requirements for the size and weight of heat exchange equipment. As early as the 1980s, Tuckerman and Pease proposed the concept of "micro-channel heat exchanger", and used a micro-rectangular structure channel on the back of the chip to cool with water, which better solved the thermal barrier bottleneck. Many scholars are committed to the research of micro h...

AI Technical Summary

Problems solved by technology

Since the test section is a micro-heat exchanger, the pressure, flow and temperature values ​​will all change in a small range, and the conventional test instruments and measurement methods will make the data error too large, and such research will become meaningless

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