Condensation Heat transfer Enhancement by using Surface Tension Gradient Techniques
碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 98 === Surface tension is an important effect for microscale. Surface tension gradient can produce self driving force for droplet movement without external energy. Thus, the interaction between surface tension gradient and droplet in microscale will be an interesti...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/17548750410784123112 |
| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 98 === Surface tension is an important effect for microscale. Surface tension gradient can produce self driving force for droplet movement without external energy. Thus, the interaction between surface tension gradient and droplet in microscale will be an interesting study.
The research uses vapor deposition by using Dodecyltrichlorosilane that designs gradient surface. Gradient surface can condense vapor into droplets and move the droplets spontaneously which are found to get a higher heat transfer efficiency. In this study, the surface modification methods are developed for condense chips and verified the chips condensing efficiency by experiments. The experimental results show that the condenser surface with special pattern design can achieve higher efficiency than ordinary surface.
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