Cooling fins的問題，透過圖書和論文來找解法和答案更準確安心。 我們找到下列股價、配息、目標價等股票新聞資訊

Tree-shaped Fluid Flow and Heat Transfer

為了解決Cooling fins的問題，作者Miguel, Antonio F./ Rocha, Luiz A. O. 這樣論述：

This book provides the first comprehensive state-of-the-art research on tree (dendritic) fluid flow and heat transfer. It covers theory, numerical simulations and applications. It can serve as extra reading for graduate-level courses in engineering and biotechnology. Tree flow networks, also known a

s dendritic flow networks, are ubiquitous in nature and engineering applications. Tree-shaped design is prevalent when the tendency of the flow (fluid, energy, matter and information) is to move more easily between a volume (or area) and a point, and vice versa. From the geophysical trees to animals

and plants, we can observe numerous systems that exhibit tree architectures: river basins and deltas, lungs, circulatory systems, kidneys, vascularized tissues, roots, stems, and leaves, among others. Tree design is also prevalent in man-made flow systems, both in macro- and microfluidic devices. A

vast array of tree-shaped design is available and still emerging in chemical engineering, electronics cooling, bioengineering, chemical and bioreactors, lab-on-a-chip systems, and smart materials with volumetric functionalities, such as self-healing and self-cooling. This book also addresses the ba

sic design patterns and solutions for cooling bodies where there is heat generation. Several shapes of fin as well as assemblies of fins are addressed. An up-to-date review of cavities, i.e., inverted or negative fins, for facilitating the flow of heat is also presented. Heat trees using high therma

l conductivity material can be used in the cooling of heat-generating bodies, and can also be applied to the cooling of electronics.

Cooling fins進入發燒排行的影片

超疏水性在結露狀況下對氣冷式熱交換器性能的影響

為了解決Cooling fins的問題，作者莫尼實 這樣論述：

濕空氣冷凝是熱管理系統中常見的過程，在冷凍空調循環中尤為重要，冷凝現象發生於當熱交換器，特別是蒸發器，在低於空氣露點的溫度下操作時。此現象將會導致鰭片側的冷凝液滴(膜)滯留(retention)與橋接(bridging),進而造成風機壓降與能耗的增加。本研究旨在開發一種超疏水熱交換器，通過其疏水特性，最大限度地減少冷凝水的滯留和橋接。本研究提出一種新型的超疏水性鰭片換熱器設計構想，採用傾斜鰭片排列以達到最小壓降和最大節能效果。本研究從熱傳與壓降性能的觀點切入，將新型超疏水性傾斜鰭片換熱器與其他換熱器作比較分析，分別為：超疏水水平鰭片換熱器、親水性傾斜鰭片換熱器、與親水性水平鰭片換熱器。此外，

本研究藉由改變不同的操作條件，如：進氣溫度、相對濕度和鰭片間距，對這四種換熱器進行性能測試。親水和超疏水換熱器中分別以膜狀冷凝和滴狀冷凝模式為主。由於其表面的高潤濕性，親水換熱器會有較大的液滴脫落直徑。相比之下，超疏水換熱器中發生的 Cassie-Baxter 液滴模式，促使了較小的液滴脫落直徑。本研究建立了一個力平衡模型來分析液滴脫落直徑，模型參數包括了表面張力、慣性力與重力對液滴的影響。本研究基於韋伯數(We)與邦德數(Bo)與液滴脫落直徑，引入了一個新的無因次參數( )，該無因次參數 可預測表面的凝結水脫落能力，在給定的鰭片間距下， 越小代表凝結水脫落能力越好。研究結果表明，滴狀冷凝的

超疏水換熱器在濕空氣下的冷凝熱傳性能相較膜狀冷凝的親水性換熱器並未有顯著的提升，此結果可歸因於非凝結性氣體效應。然而，在壓降方面，超疏水性換熱器與親水性換熱器相比，可帶來高達70%的壓降降低，大幅提升節能效果。壓降的降低歸因於聚結誘發的液滴跳躍現象，使得冷凝水連續脫落。

Constructal Law and the Unifying Principle of Design

為了解決Cooling fins的問題，作者Rocha, Luiz A. O. (EDT)/ Lorente, Sylvie (EDT)/ Bejan, Adrian (E 這樣論述：

Design happens everywhere, whether in animate objects (e.g., dendritic lung structures, bacterial colonies, and corals), inanimate patterns (river basins, beach slope, and dendritic crystals), social dynamics (pedestrian traffic flows), or engineered systems (heat dissipation in electronic circui

try). This "design in nature" often takes on remarkably similar patterns, which can be explained under one unifying Constructal Law. This book explores the unifying power of the Constructal Law and its applications in all domains of design generation and evolution, ranging from biology and geophysic

s to globalization, energy, sustainability, and security. The Constructal Law accounts for the universal tendency of flow systems to morph into evolving configurations that provide greater and easier access over time. The Constructal Law resolves the many and contradictory ad hoc statements of "opti

mality", end design, and destiny in nature, such as minimum and maximum entropy production and minimum and maximum flow resistance, and also explains the designs that are observed and copied in biomimetics. Constructal Law and the Unifying Principle of Design covers the fundamentals of Constructal T

heory and Design, as well as presenting a variety of state-of-the-art applications. Experts from the biological, physical and social sciences demonstrate the unification of all design phenomena in nature, and apply this knowledge to novel designs in modern engineering, such as vascularization for se

lf-healing and self-cooling materials for aircraft, and tree fins and cavities for heat transfer enhancement.

以紅外線測溫與質點影像測速技術研究平行與交錯翼型擾流器於雙通道之紊性熱傳增益

為了解決Cooling fins的問題，作者李偉瑄 這樣論述：

近年來，隨著全球能源需求不斷的增加以及化石能源儲備的日漸枯竭，如何更有效率地運用有限化石能源是全球面臨的共同課題。目前使用的燃料大多都通過熱能轉換供社會或工業使用，因此提升熱交換器的熱傳性能是提升能源利用效率的重要方式之一。本研究在前人最佳設計之具翼型擾流器之蛇形方管熱交換器基礎上，進一步優化擾流器擺放方式以增益其熱傳，並使用紅外線熱像儀(Infrared Thermography，簡稱IRT)、壓力傳感器以及質點影像測速儀(Particle Image Velocimetry，簡稱PIV)量測方管中局部溫度分布、壓力損失以及流場結構，以便探討流場結構如何影響熱傳增益與壓力損失。本研究使用之

翼形擾流器皆為3D列印所印製，按照與管道壁面貼合方式可分為I (側壁貼合)、II (上下壁面貼合)、III (下壁面貼合)三種類型，擺放方式為平行(Inline)或交錯(Staggered)。IRT熱傳與壓損量測實驗於雷諾數(????????)範圍5000 ≤ ???????? ≤ 20000內進行，PIV流場實驗於???????? =10000進行。由PIV與IRT實驗可以發現，於通道中轉彎區擺放三翼形擾流器I以及在出彎處擺放兩翼形擾流器II將使主流流體加速，讓第一通道的高熱傳得以延續到的二通道，通道整體紐塞數比((Nu) ̅/〖Nu〗_0)相較於前人提升6.4%。而雙排交錯擺放之翼形擾流器

III，能大幅增強通道中二次流強度，增進冷熱流體混合。本研究使用雙排交錯擺放的翼形擾流器III，(Nu) ̅/〖Nu〗_0較前人提升46%，在壓損(f ̅/f0)區間45≤ f ̅/f0 ≤200內，雙排平行擺放的翼形擾流器III有最佳熱性能係數(Thermal Performance Factor，簡稱TPF)為1.45，優於先前文獻。而進一步探討平均流力因子與側向平均紐塞數比¯((Nu/〖Nu〗_0))_sp皮爾森相關性(Pearson Correlation)發現縱向速度¯((|V|/U_b))_CS、側向速度¯((|W|/U_b))_sp與無因次渦度¯((|ω|D_H/U_b))_CS

三流力因子與其有較高的相關程度，相關係數(R)分別為0.85、0.84與0.83。最後本研究整合前人平滑管道與機翼型擾流器及本研究實驗數據，提出兩個較前人適用範圍更為廣泛之¯((Nu/〖Nu〗_0))_sp經驗公式，此公式亦將為未來熱傳機器學習提供數據基礎。