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表面改值技術及應用在冷凝熱傳之實驗探討

表面改值技術及應用在冷凝熱傳之實驗探討. 姓名 : 黃國瑞 孫嘉鳴 江秉青 學號 :P46961051 P46954436 Q26951029 2008.01.22. outlines. 1.Introduction The main idea in this study Surface energy patterning techniques 2. Experimental setup 3.Experimental results and discussion 4. Conclusion. Filmwise condensation. H 1.

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表面改值技術及應用在冷凝熱傳之實驗探討

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  1. 表面改值技術及應用在冷凝熱傳之實驗探討 姓名:黃國瑞 孫嘉鳴 江秉青 學號:P46961051 P46954436 Q26951029 2008.01.22

  2. outlines 1.Introduction • The main idea in this study • Surface energy patterning techniques 2. Experimental setup 3.Experimental results and discussion 4. Conclusion

  3. Filmwise condensation H1 Hydrophilic surface TH H Dropwise condensation Dropwise condensation Dropwise condensation Tc Hydrophilic/phobic composite surface H2 H3 Hydrophobic surface Introduction Vapor Nucleation Growth TH Tc Heat flux H3>H1 and H2

  4. SAM Surface energy patterning technique: Self Assembly Monolayer (SAM) SAM OTS ODT AUDT DDT Si/SiO2 Hiroaki Onoe,Kiyoshi Matsumoto,Shimoyama,Associate Member,IEEE

  5. Telfon surface fabrication glass spin pattern teflon Contact angle=110°

  6. Surface energy patterning technique: micro structures SU-8 structure Contact angle=115° SU-8厚膜光阻材質錶面的接觸角為73°，小圓柱的表面接觸角為115 °，即利用微米尺度的小圓柱結構可造成疏水效果。 Christian.G,Langmuir,23,3495-3502,2007

  7. Superhydrophobic surface Superhydrophobic surface Wax+ micro structures

  8. Experimental setup(一) 1.Steam generator 2.Re-heater 3.Flow meter 4.Valve 5.Mixer 6.Fin 7.Condensate plate 8.Pump A.Condensate reservoir B.Water tank T1.condensate plate temperature T2.cooling water inlet temperature T3.cooling water outlet temperature

  9. fin Experimental setup(二)

  10. Condensation heat transfer on homogeneous surfaces

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