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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 施文彬 | |
| dc.contributor.author | Chun-Lin Lee | en |
| dc.contributor.author | 李俊霖 | zh_TW |
| dc.date.accessioned | 2021-06-15T02:44:43Z | - |
| dc.date.available | 2009-08-11 | |
| dc.date.copyright | 2009-08-11 | |
| dc.date.issued | 2009 | |
| dc.date.submitted | 2009-08-10 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44202 | - |
| dc.description.abstract | 本篇文章提出了V型微流道的研究及其在可撓式微熱管的應用。V型微流道是以聚氨酯(PU)在矽模上進行圖型轉移製作而成。而矽模則是以曝光顯影搭配定向蝕刻產生共軛V型槽於矽晶元上。而此V型流道在微熱管中是應用於毛細結構。整個可撓式微熱管是以聚氨酯(PU)構成，此外在蒸發及冷凝端加入具有立方結構的鋁片增加熱傳遞的效果，也增加與聚氨酯結構的接觸面積，提升附著的效果。為了使微熱管可以正常運作，測量了不同流體在聚氨酯試片上的接觸角，以及進行了不同流體的毛細測試來評估其抵抗重力的能力。而甲醇被選為適合的工作流體，並且進行了在V型微流道中的毛細蒸發測試，在有加熱源的情況下針對了不同傾斜角度量測其所能爬升的高度。 | zh_TW |
| dc.description.abstract | This work presents the investigations of the V-shaped microchannels and its application on the flexible micro heat pipe. The V-shaped microchannel structure is fabricated by polyurethane (PU) from pattern transfer. The lithography and orientation dependent etching is applied to silicon substrate to fabricate the mold with conjugated V-shape grooves. The whole flexible micro heat pipe is composed of PU structure, and the microchannel structure is applied to the micro heat pipe as the wick section. In addition, the aluminum plates with cubic structure are embedded in the micro heat pipe to increase the heat transfer ability at the condenser and evaporator. The design of the cubic structure could increase the contact area which enhanced the bonding with the polyurethane structure. To find the adequate working fluid, the contact angle of different fluids are measured and capillary test are applied. And the different criterions are also utilized. The methanol is chosen as the adequate working fluid. And the capillary evaporation is applied to the V-shaped microchannel structure with methanol as the testing fluid to measure the dry-out length under different tilting angles. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T02:44:43Z (GMT). No. of bitstreams: 1 ntu-98-R96522534-1.pdf: 2035770 bytes, checksum: ec21e5d3d731e7f69eeff38148f36056 (MD5) Previous issue date: 2009 | en |
| dc.description.tableofcontents | 誌謝 I
摘要 II Abstract III Table of Contents IV List of Figures VII List of Tables IX List of Appendix Figure X List of Appendix Tables X Nomenclature XII Greek Alphabet XIII Chapter 1. Introduction 1 1.1. Introduction of the heat pipe 1 1.2. Introduction of the micro heat pipe 4 1.3. Literature review 5 1.4. Research purpose of our micro heat pipe 18 Chapter 2. Principle and Theoretical Analysis of Micro Heat Pipes 20 2.1. Micro heat pipe operating principle 20 2.2. Concus-Finn condition 23 2.3. Operation limit 24 2.3.1. Capillary limit 25 2.3.1.1. Capillary pressure 26 2.3.1.2. Vapor pressure drop 29 2.3.1.3. Liquid pressure drop 29 2.3.1.4. Hydrostatic pressure 31 2.3.2. Entrainment limit 32 2.3.3. Boiling limit 33 2.3.4. Sonic limit 34 2.4. Thermal resistance 34 2.5. Thermal conductivity 37 2.6. Working fluid 37 2.6.1. Figure of merit 37 2.7. Capillary evaporation performance of V-shaped microgrooves 39 Chapter 3. Design and Fabrication of Micro Heat Pipe 42 3.1. Design of flexible micro heat pipe 42 3.2. Material of the flexible micro heat pipe 45 3.2.1. Polymer material -- Polyurethane 45 3.2.2. Aluminum plate 46 3.3. Fabrication of the micro heat pipes 48 3.3.1. Fabrication of the mold 49 3.3.2. Fabrication of the PU wick structure 54 3.3.3. Fabrication of the cover layer 57 3.3.4. Sealing process 58 Chapter 4. Experimental Setup 60 4.1. Contact angle measurement 60 4.2. Heat conductance of the PU structure 62 4.3. Capillary test of the V-shaped groove 64 4.4. Capillary evaporation performance of the micro grooves 66 Chapter 5. Result and Discussion 69 5.1. Contact angle measurement and Concus-Finn condition 69 5.2. Heat conductance of the PU structure 71 5.3. Capillary test of the V-shaped groove 72 5.4. Capillary evaporation performance of the micro grooves 74 5.5. Consideration of the design of the micro heat pipe 78 5.5.1. Polyurethane micro heat pipe 78 5.5.2. Effect of the embedded aluminum plates 78 5.5.3. Methanol in the polyurethane micro heat pipe 80 Chapter 6. Conclusion and Future Work 82 6.1 Conclusion 82 6.2 Future work 83 Appendix 85 A1. Pattern transfer with PDMS mold 85 A2. Fabricaton and characterization of porous polymeric composites of PDMS and nylon for flexible heat pipe 88 Abstract 88 A2.1. Introduction 89 A2.2 Principle 93 A2.3 Material and method 94 A2.4 Fabrication 96 A2.4.1 Fabrication of porous material 96 A2.4.2 Sample fabrication 98 A2.4.3 Heat pipe 98 A2.5. Result and discussion 101 A2.5.1 Compression test 101 A2.5.2 Porosity 103 A2.5.3 Absorption test 104 A2.5.3.1 III-series 105 A2.5.3.2 IV-series 108 A2.5.3.3Absorbing velocity 111 A2.6. Conclusion 112 Reference 113 Autobiography 117 | |
| dc.language.iso | en | |
| dc.subject | 毛細結構 | zh_TW |
| dc.subject | 毛細蒸發 | zh_TW |
| dc.subject | 圖型轉移 | zh_TW |
| dc.subject | 聚氨酯 | zh_TW |
| dc.subject | V型微流道 | zh_TW |
| dc.subject | 可撓式微熱管 | zh_TW |
| dc.subject | capillary evaporation | en |
| dc.subject | wick structure | en |
| dc.subject | pattern transfer | en |
| dc.subject | polyurethane | en |
| dc.subject | V-shaped microchannels | en |
| dc.subject | flexible micro heat pipe | en |
| dc.title | 高分子製作V型微流道之研究及在可撓式微熱管上之應用 | zh_TW |
| dc.title | Investigation of the Polymer Based V-shaped Microchannels and the Application on the Flexible Micro Heat Pipe | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 97-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.coadvisor | 陳希立 | |
| dc.contributor.oralexamcommittee | 潘國隆,蔡曜陽 | |
| dc.subject.keyword | 可撓式微熱管,V型微流道,聚氨酯,圖型轉移,毛細蒸發,毛細結構, | zh_TW |
| dc.subject.keyword | flexible micro heat pipe,V-shaped microchannels,polyurethane,pattern transfer,capillary evaporation,wick structure, | en |
| dc.relation.page | 117 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2009-08-10 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| 顯示於系所單位： | 機械工程學系 | |
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