| DC 欄位 |
值 |
語言 |
| DC.contributor | 能源工程研究所 | zh_TW |
| DC.creator | 潘軒毅 | zh_TW |
| DC.creator | Pan, Hsuan-Yi | en_US |
| dc.date.accessioned | 2019-1-30T07:39:07Z | |
| dc.date.available | 2019-1-30T07:39:07Z | |
| dc.date.issued | 2019 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=105328019 | |
| dc.contributor.department | 能源工程研究所 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 石墨烯具有高化學穩定性及高耐久性的特點，所以可將石墨烯塗
佈在熱傳表面上形成疏水性表面。然而對於低表面張力的液體，塗佈
石墨烯無法形成滴狀冷凝以提升熱傳性能，但實際上塗佈石墨烯仍達
到接觸角提升與表面能降低的效果。本研究使用化學氣相層積法
(CVD)，將石墨烯與氟化石墨烯塗佈至純銅鰭管表面上以提升冷凝熱
傳性能，並將測試鰭管置於本實驗室設計之可視化冷凝實驗系統中，
透過量測工作流體 R-245fa 之管外冷凝熱傳係數及觀察冷凝液滯留在
鰭片間距的情形，比較一般鰭管表面、石墨烯表面與氟化石墨烯表面
的差異。期望透過增加接觸角，在鰭片壁面上的未淹沒區域有更少的
冷凝液滯留使熱傳面積增加以提升熱傳性能。 | zh_TW |
| dc.description.abstract | Graphene has the features of high chemical stability and high
durability, so graphene can be coated on heat transfer surface to form
hydrophobic surface. However, for liquid with low surface tension,
graphene coating can’t form drop condensation to improve heat transfer
performance. But in fact, graphene coating still can reach the contact
angle increasing and surface energy reducing effect. This study adopts
Chemical Vapor Deposition (CVD) to make graphene and fluorinated
graphene be coated on pure copper integral fin tube surface to improve
condensation heat transfer performance and also put the test integral fin
tube in the visible condensation experiment system that is designed by
this laboratory to compare differences between general integral fin tube
surface, graphene surface and fluorinated graphene surface through
measuring the outside condensation heat transfer coefficient of the
working fluid R-245fa and observing the status of condensate between
fins. It’s expected that the drainage area on fin flank has less condensate
by increasing the contact angle so that heat transfer area can be increased
to improve heat transfer performance. | en_US |
| DC.subject | 石墨烯 | zh_TW |
| DC.subject | 氟化石墨烯 | zh_TW |
| DC.subject | 鰭管 | zh_TW |
| DC.subject | 冷凝熱傳性能 | zh_TW |
| DC.subject | R-245fa | zh_TW |
| DC.title | 冷媒R-245fa於不同石墨烯塗佈鰭管上凝結熱傳性能之實驗分析 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |