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| Boiling Heat Transfer of Two-way Micro-channel Porous Composite Structure |
| Received:September 24, 2015 Revised:April 15, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2016.02.004 |
| KeyWord:sintering micro grooves particle size of copper powder boiling heat transfer |
| Author | Institution |
| ZHOU Shu-zhang |
School of Design， South China University of Technology， Guangzhou ， China |
| SUN Yu-li |
School of Design， South China University of Technology， Guangzhou ， China |
| CHEN Yan |
School of Design， South China University of Technology， Guangzhou ， China |
| HU Xue-bing |
School of Design， South China University of Technology， Guangzhou ， China |
| WU Xiao-feng |
School of Design， South China University of Technology， Guangzhou ， China |
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| Abstract: |
| Objective To develop a new surface structure to enhance boiling heat transfer enhancement. Methods First porous layer of copper on the copper plate was sintered， and then the porous layer was grooved by using wire cutting. The effects of the channel parameters including the number of channel, channel width, channel spacing and channel direction etc. on the boiling heat transfer effect were studied. Results The slotted surface increased the surface area of heat transfer and facilitated gas evolution, reduced the resistance of gas escaping. Thereby the slotted porous surface strengthened the effect of boiling heat transfer. The heat transfer coefficient could be increased by 2-3 times compared with smooth surface. Compared with the one-way micro-channel, two-way cross-channel had a better heat transfer effect, capable of forming a stable liquid supplement and gas evolution network. Conclusion Micro machining composite structure on the porous surface could significantly improve the boiling heat transfer enhancement. |
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