A heat exchange enhancement device and design method for natural convection heat dissipation

Abstract

The invention discloses a heat transfer strengthening device for natural convection heat dissipation and a design method thereof. The heat transfer strengthening device comprises an auxiliary heat dissipation wall fixedly disposed on the surface of a device to be cooled. The auxiliary heat dissipation wall and the surface of the device to be cooled constitute a cylindrical ventilation passage. Thecross-sectional area of the cylindrical ventilation passage remains unchanged or gradually decreases along the flow direction of an air flow. The auxiliary heat dissipation wall is provided with a plurality of vents. The heat transfer strengthening device of the invention can be applied to the surface of a device based on natural convection heat transfer, can improve an air natural convection heat dissipation effect, can retard sunlight irradiation, and can reduce the surface temperature of the outdoor device to be cooled. The auxiliary heat dissipation wall can avoid the direct radiation ofthe sunlight to the surface of the device to be cooled, thereby reducing the total amount of heat dissipation of the device. The cylindrical ventilation passage can form a chimney suction effect to effectively increase the natural convection velocity of the air near the surface of the device to be cooled, so as to strengthen the heat transfer.

Description

technical field [0001] The invention belongs to the technical field of natural cooling, and is mainly aimed at outdoor electronic equipment, electrical equipment and energy power equipment relying on air natural convection for heat dissipation, and particularly relates to a natural convection heat exchange enhancement device and a design method thereof. Background technique [0002] Electronic equipment, electrical equipment, and energy power equipment operate in an outdoor environment and rely on natural air convection for natural cooling. In the outdoor environment, the equipment itself generates heat, and the surface of the equipment will be directly radiated by the sun. The surface heat flux density of the equipment, especially the high-power equipment, will reach several thousand watts per square meter. During periods of intense sunlight, the temperature of the outdoor air rises, which will greatly affect the heat dissipation effect of the surface of the equipment to be...

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Problems solved by technology

During periods of strong sunlight, the temperature of the outdoor air rises, and the cooling effect of the surface of the equipment to be cooled will be greatly affected, which will have a great impact on the control and adjustment of the equipment. In severe cases, the equipment will be shut down, which will seriously affect the reliability of the equipment operation.

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