Porous surface boiling heat transfer enhancement device and preparation method thereof
A technology of boiling heat exchange and strengthening device, which is applied in indirect heat exchangers, lighting and heating equipment, etc., can solve the problems of fixed shape, surface microstructure cannot adjust the size of heat flow load, etc., to reduce superheat, The effect of improving energy efficiency, improving stability and reliability
Active Publication Date: 2015-12-30
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0008] In view of the above technical problems, the present invention provides a porous surface boiling heat transfer enhancement device using a shape memory alloy material and its preparation method to solve the problem that once the original porous surface is processed, the shape is fixed and the surface microstructure cannot be determined according to Technical flaws in adjusting the size of the heat flow load
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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...
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The invention provides a porous surface boiling heat exchange enhancement device and a method for manufacturing the same. The porous surface boiling heat exchange enhancement device comprises a heat exchange enhancement device body, a plurality of heat dissipation grooves and a plurality of micro-fins. The heat dissipation grooves are formed in the outer surface of the heat exchange enhancement device body; the corresponding micro-fins are separated from one another, are positioned between each two rows of heat dissipation grooves and are made of shape memory alloy materials, and each micro-fin can be in two states after being trained; the micro-fins in the first states are oblique at the temperature lower than a preset temperature, and cover the upper portions of the heat dissipation grooves, and the heat dissipation grooves are converted into porous grooves; the micro-fins in the second states are tilted at the temperature higher than the preset temperature, the upper portions of the heat dissipation grooves are opened completely or partially, and the heat dissipation grooves are converted into open grooves. The porous surface boiling heat exchange enhancement device and the method have the advantages that the energy utilization efficiency can be improved, the temperature of a heating device can be low under the control of the porous surface boiling heat exchange enhancement device, and the stability and the reliability of equipment can be improved.
Description
technical field [0001] The invention relates to advanced thermal management technologies in refrigeration, chemical industry, aerospace and other industries, in particular to a porous surface boiling heat transfer enhancement device and a preparation method thereof. Background technique [0002] In the process of energy utilization and transfer, heat transfer enhancement is of great significance for improving the efficiency of the entire system and reducing equipment costs. It has a very wide range of applications in heat exchangers, aerospace and electronic equipment cooling. Since the middle of the 20th century, people have developed various technologies to enhance boiling heat transfer, and the porous surface microstructure is considered to be the most effective boiling heat transfer enhancement technology, and has become a key means to improve the efficiency of heat exchange equipment and promote energy conservation and emission reduction in industrial enterprises one. ...
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IPC IPC(8): F28D21/00
Inventor 姜玉雁王涛唐大伟
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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