Wu-Lun Hsieh, 謝武倫

碩士 / 元智大學 / 機械工程學系 / 94 / This paper has investigated the performance of the plate-fin heat exchangers numerically. The validity of the used CFD software was confirmed first by comparing the obtained numerical results of the fin surface temperature distribution and the region of the condensation on the fin surface with the measured data by previous experiments. The results of this thesis can be used as a guildline of the designers of heat exchangers. The parameters studied in the present work in...

Bo-Han Hsieh, 謝泊含

碩士 / 國立臺灣大學 / 電子工程學研究所 / 95 / This thesis reports an analysis of DC and AC behavior of Tri-Gate Fin-FET (Field Effect Transistor) device. In chapter 1, we make an introduction for Fin-FET and describe its evolution from conventional MOS device and propose a structure called Tri-Gate Fin-FET device. In chapter 2, we discuss the DC phenomenon of a 100nm Tri-Gate Fin-FET device with the N+ poly gate in different fin width, height, and doping. In chapter 3, we discuss the capacitance phenomenon o...

Hsin-Hao Chiu, 邱信豪

碩士 / 元智大學 / 機械工程學系 / 92 / This research has experimentally investigated the performance of four different self-design heat sinks. The shape of the heat sinks is triangular and two the fins are attached together to form a wedge shape. The inclined angles of the fins are 30 and 45 degrees with respect to the air flow direction and the arrangements of fins have also two types: in-line and staggered. The results show that the heat sinks with 30 degrees inclined and with the in-line arrangement have ...

Lo Fu-Yu, 羅甫聿

碩士 / 國立屏東科技大學 / 車輛工程系所 / 100 / A study was carried out by using CFD to investigate the thermal module of LED lamp. This study will discuss the relationship between the heat distribution and heat transfer effect on the LED lamp cooling module, and then design heat sink to optimize parameters and save the cost of the test to get the best of the cooling module. In order to improve the simulation accuracy, the fluid mode selection and parameters of thermal radiation must be checked carefully. These ...

Michael Liao, 廖文川

碩士 / 國立中興大學 / 機械工程學系 / 92 / Abstract In this study, a computational fluid dynamics (CFD) package of Flotherm was used to investigate the thermal analysis of plate fins with variable thickness and constant height for an electronic module in laminar flow. The simulated parameters are two kinds of thermal conductivity (k=180W/m-K and 385 W/m-K) , two different aspect ratio of plate fins, and plate sharpness(a=0.1~1) so there are the analysis results of 40 sets shown in present analys...

Nai-Chien Chang, 張乃建

碩士 / 元智大學 / 機械工程學系 / 90 / Both numerical and experimental approached have been used to investigate the thermal performance of heat sinks for electronic packages. The effects of operating parameters include inlet air velocity and temperature, size and power of heat source, different geometries and material properties of heat sinks, etc. on the thermal resistance of heat sink have been studied. The numerical results are also compared to the corresponding experimental results. The result...

Chien-Kuo Tzeng, 曾健國

碩士 / 國立清華大學 / 動力機械工程學系 / 87 / Although the electric motorcycle has been introduced in the market, but it still cannot replace the wild usage of IC engine motorcycle in the populated Taiwan. The pollution caused by the emission of motorcycle has been under control by government. Most of research articles have taken the view from engine combustion regarding to the pollution problems. But in the process of engine combustion, no matter the liquefied fuel is rich or lean. The pollutant inside the eng...

Kuo-Wei Li, 李國瑋

碩士 / 國立中興大學 / 機械工程學系所 / 100 / This study, based on the control volume analysis, employs the simulation software (Fluent/Ansys) to analyze the flow structures and the corresponding efficiency in relation to the Strouhal number while the fin with different flexibility oscillates at different frequencies. This paper analyzes the relative proportion of the rate change of the momentum within the control volume, the pressure force acting on the surface and the net momentum flux through the control vol...

Han Sung Liu, 劉漢松

碩士 / 國立臺灣科技大學 / 機械工程研究所 / 83 / The analysis of finite element method is presented for the heat transfer and flow field in two in-line isothermal square prism . The effect of the square prism distance on the flow field and heat transfer is investigated through numerical solutions of the governing equations . The flow field is found to be quite complex. This paper detailed the effect of square prism ...

Kai-An Lee, 李鎧安

碩士 / 國立中興大學 / 機械工程學系所 / 102 / This study investigates by CFD to realize the key parameters and related mechanisms that affect the propulsive performance while the flapping fin undergoes the combined pitching-heaving motion with a phase angle of 90 degree. The maximum pitching angle (θmax) and heaving amplitude (hmax) are and 0.4c, respectively. By changing the inflow velocity, the flapping frequency and modifying the heaving motion, the flow characteristics, the thrust forces and the propulsive...

Min-Lang Chen, 陳敏郎

碩士 / 國立中央大學 / 機械工程學系在職專班 / 103 / In order to solve the thermal issues of servers arising from a large amount of network access, the present effort seeks to develop a liquid cooling CPU heat sink for 1U server. First, numerical analysis was used to find out the best fin space, and then the design of cross-cut pin fin was introduced. As a result, a proper number of the segmented sections was found to enhance the disturbance of flow and to avoid the frictions caused by too many segmented sections. ...

Kuan Wei Ho, 何冠葳

碩士 / 國立中興大學 / 奈米科學研究所 / 102 / In this thesis we study the minor excess carrier concentration, minor excess carrier current density, and the total output current density of the fin-structure solar cell according to a one-dimension model. Analytical results are obtained according to the one-dimension model. We calculate and analyze in detail the effect of the device dimension to the output current density at incident light wavelength of 1 m , in both short circuit and loaded case. ...

Kuang-Yi, SYU, 徐匡毅

碩士 / 國立勤益科技大學 / 冷凍空調系 / 103 / In this study, it simulates in numeric to observe the impact of vortex generators at the plate fin and louver fin tube heat exchanger, analysis the tube near wake region of the delta wing vortex generators affect heat transfer and pressure drop to fin and tube heat exchanger, to provide a reference design containing a vortex generator for louver fin and flat fin tube heat exchangers. Fin-tube heat exchanger in this study contains plate flat fin and louver fin, the l...

Bing-Chang,Hsu, 許柄政

碩士 / 國立勤益科技大學 / 冷凍空調系 / 103 / In this study, investigating the effects of one row and two row for different types of louver to louver fin and tube heat exchanger performance by numerical simulation. Explore the louver are: curved blade and flat blade，and analysis louver angle and louver width on the performance of heat exchanger . To provide a louver fin on the fin and tube heat exchanger design. The longitudinal tube pitch is 12.7mm, the transverse tube pitch is 21mm, the tube collar is 7.53mm,...

Chang, Chun-Jung, 張峻榮

碩士 / 中國文化大學 / 材料科學與製造研究所 / 87 / The present study had tested the fin-and-tube heat exchangers with slit fin and plain fin geometry. Total of twenty-four different specification of heat exchangers were tested both in open type wind tunnel and close type wind tunnel. The effect of the number of row, fin pitches and fin pattern of the air-side heat and mass transfer performance were experimentally investigated. The test results are compared and presented as Colburn j factor and fanning friction fac...

Chen,Han-Chiang, 陳漢強

碩士 / 國立勤益科技大學 / 冷凍空調系 / 102 / The effects of flat end plates on the louver fin-and-tube heat exchanger are studied by numerical simulation. The heat transfer and flow field including the flow efficiency and by-pass factors of the flow under different wind speed in the heat exchangers of 3, 4, 5, and 7 fins and two end plates are shown in the results. The flow field in the heat exchanger channel including the duct and louver directed streams is also shown in the results. The results show that...

LIOU,JIAN-JHIH, 劉建志

碩士 / 國立高雄應用科技大學 / 機械工程系 / 105 / This thesis is study the heat transfer performance of a cylindrical heat sink using Taugchi Method. First, the experiment result is verified to the numerical analysis of cylindrical heat sink by computer auxiliary engineering. We choose the orthogonal array L_9 (3^4) and the selected design parameter factors with three levels, respectively are volume ratio, the shape of columnar heat sink, the angle between flow field and heat sink and the flow velocity of enforce...

Huang, Kuo-Hua, 黃擴樺

碩士 / 遠東科技大學 / 機械工程研究所在職專班 / 104 / This paper discusses the features how the thermal factors present in the heat through the vertical heat-sink with constant heat source at the bottom of the vertical heat-sink. Air stream flowing through the fin will takes heat energy out of the heat-sink via the gaps, and achieves the purpose of cooling. With the methods of date simulation, the research tries to explode the results caused by the difference of cooling fins height (20mm-40mm), fins space (4mm-12mm...

Wang, Szu-Kai, 王思凱

碩士 / 國立交通大學 / 機械工程系所 / 104 / Mist flow is a two-compound flow produced by mixing the dispersed water droplets with air flow. Mist flow cooling achieved by high heat removal rate by evaporating water droplets to absorb heat. In this study, heat transfer in a single-side heated square channel with hydraulic diameter of 40mm was investigated by infrared thermography. Heat transfer behavior was examined for the cases of smooth surface and finned surface (single row , two rows and staggered arrays) a...

Chih-Sheng Tsai, 蔡志聖

碩士 / 淡江大學 / 航空太空工程學系碩士班 / 104 / This research investigated the temperature and flow fields of LED light bulbs by a CFD software (ANSYS-FLUENT). A 60W LED is used as the reference model for comparison. Some modified models with spiral fins were studied under free and forced convections. Various radiuses of curvature and numbers of fins were also studied and analyzed for heat dissipation performance. Results demonstrated that when cooled by the spiral airflow cooling module was the heat dissipatio...

Shuen-Yi Keng, 耿順一

碩士 / 國立中興大學 / 電機工程學系所 / 104 / The stress distribution and magnitude of 3D FinFET cause by each process steps is studied in this work. SolidWorks is first applied to drawing the 3D FinFET structural diagram , and then , the ANSYS stress analysis simulator is utilized for simulating each process steps generating stress , Sentaurus TCAD and second order piezoresistance model are used for calculating the mobility change in stress.

Lin Shih-Peng, 林世鵬

碩士 / 國立屏東科技大學 / 車輛工程系所 / 99 / This thesis aims to simulate the thermal-flow filed of an electrical motor with computational fluid dynamics method. Various types of conduction fins are attached on the housing of stators to test the performance on dissipation of the heat flux from the electrical loops. Present work designed a new model of coupling porous medium layer and solid conduction plate to collect the exhaust heat flux on the exit of electrical motor to serve as a renewable energy. The comm...

Chia-Ming Chang, 張家銘

碩士 / 國立臺灣大學 / 光電工程學研究所 / 104 / After describing Moore’s Law, we introduce node technology progression of semiconductor manufacturing in this thesis, including the corresponding challenges and the solution to them. After studying research trends, we predict sub-10nm node technology development, and introduce short-channel effects (SCEs) and narrow-channel effects (NCEs) briefly. In the first part, we introduce III-V material characteristics, and their developing history and operating principles o...

Yu-Hang Liu, 劉宇航

碩士 / 國立臺灣大學 / 應用力學研究所 / 104 / Last few years people focus on developing AUV（Autonomous Underwater Vehicle）. In the pursuit of high-efficiency propulsion mechanism, the nature of various marine organisms and its highly efficient mobility mode is a good learning object. Related researches for the swimming behavior of fish can roughly divided into two types:(1) Using living organisms for the study and observe their behavior patterns.(2)Using biomimetic mechanism to replace living organisms and me...

Kung-Hsien Lin, 林恭賢

碩士 / 國立中興大學 / 電機工程學系所 / 105 / As devices scale down, VDD is scaled consistently due to power reduction. The subthreshold swing (S.S.) with 2.3KbT/decade for MOSFET in room temperature restricts the switch characteristics. To overcome such limits, a lot of researchers proposed to improve such a situation by connecting metal-insulator-metal (MIM) negative capacitance with ferroelectric materials (FE) as the dielectric layer in series and stacking on the gate. Such an advantage not only could redu...

Nai-Kuan Mou, 牟乃寬

碩士 / 國立高雄大學 / 電機工程學系碩士班 / 104 / FinFET has considered as one of the most promising options for future devices to replace planner MOSFETs. The N-type Tri-Gate FinFETs were studied in this work. The characteristics of P-N junction of FinFET devices with different channel lengths and Fin numbers were investigated. It is found that average junction current (IB) will decrease with fin number increasing. On the other hand, the junction current variation increased with channel length increasing as the ...

鄭吉宏

碩士 / 逢甲大學 / 機械與電腦輔助工程學系 / 104 / This paper discusses a high-speed motor spindle having cold vapor flow channel of fin design and use of the property of symmetry axis spindle simplify eventually reduced to a spindle 30 degrees sector, the use of 3D models to create conjugate heat transfer models and analysis spindle heat transfer.We analyse with and without fins, channel width, difference pressure and different fin materials. Through the study, we find that the best way to remove heat is the natu...

Lee, Wei Yi, 李唯溢

碩士 / 國立清華大學 / 動力機械工程學系 / 104 / 因申請專利緣故，資料延後公開

Jui-Ching Hsiao, 蕭瑞慶

碩士 / 國立臺灣海洋大學 / 輪機工程系 / 93 / The purpose of this study is to investigate the fully developed laminar flow and convective heat transfer in internally finned tube heat exchangers numerically. The boundary condition of uniform outside wall temperature is assumed. Parameters of the thickness, length, and quantity of fins and thermal conductivity ratio between fin and working fluid are varied to see the change of friction factor as well as Nusselt number. In the analysis, it is assumed that the fin s...

Chiu-Hsia Cheng, 鄭秋霞

碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 92 / Abstract In this study, we use the 5x5 degree longlinning catch and effort data compiled by SPC to observe the distribution and migration characteristics of South Pacific albacore. Both gravity of fishing ground and vector of each grid and calculated by using 5 by 5 CPUEs of albacore, with which the displacement of distribution and migration routes are estimated. Meanwhile, the temperature of SST and subsurface layers collected from NOAA were also conducted ve...

Ting-Shuan Huang, 黃鼎軒

碩士 / 義守大學 / 機械與自動化工程學系 / 102 / Light-Emitting-Diode (LED) is a high heat flux lighting devices.Light from LED converts 70% ~ 85% energy to heat losses when operated. Recently, LED chips is made as small as well, so its heat flux is getting higher due to smaller surface area. If the thermal module of LED is not well designed, the corresponding high temperature in LED will lead to reduction in its brightness and life time. Hence, the design of thermal module of LED becomes a key technology. In vie...

Da-YuGuo, 郭達譽

碩士 / 國立成功大學 / 系統及船舶機電工程學系碩博士班 / 100 / This thesis used finite volume method (FVM) to analyze steady-state flow and heat transfer in three-dimensional natural convection with heat fins. Using finite volume method discretes the Navier-Stokes equations and Energy Equation and then constructs a system of algebraic equations. It can be solved by semi-implicit method for pressure-linked equation (SIMPLE), and the solution must be iterated to convergence within each step to obtain the velocity field, p...

You-ChengHuang, 黃有晟

碩士 / 國立成功大學 / 機械工程學系碩博士班 / 100 / Thermoelectric generators present potential applications in the conversion of low level thermal energy into electrical power. As miniature generating devices, the TEG has the advantages of compact structure, high reliability, no vibration and direct electric energy conversion. When the thermoelectric generators are used to recover waste heat from a larger chimney plate, the TEG hot side temperature and thus the electric power output can be increased through built...

Chiu, Yufang, 邱郁方

碩士 / 國立暨南國際大學 / 電機工程學系 / 99 / In this thesis, the SONOS-type TFTs memories with 3-D finlike channels were fabricated by combining the UV nano imprint technology and the conventional photolithography technologies. The finlike and nano wire channels were fabricated by UV NIL and reactive ion etching. Then, the SONOS thin film transistor memories were fabricated and the NH3 plasma was used to improve the performance of the device. The electrical characteristics of devices were measured by HP-4156, ...

Wei-Lin Hsieh, 謝偉麟

碩士 / 國立中興大學 / 機械工程學系所 / 98 / This study investigates the flow structures behind of an oscillating fin, the thrust force and propulsive efficiency by experiment. One rigid and one flexible fin are employed. The Reynolds number, based on the oscillating amplitude, is about 1000. The length of fin is 7 cm, the oscillating amplitude is and the oscillating frequency ranges from 0.4 Hz to 1.5 Hz. For both fins, while the Struohal number is smaller than 0.192, the leading vortex leads the trailing vo...

Jian-Jhang Chen, 陳建璋

碩士 / 大同大學 / 機械工程學系(所) / 99 / In this study, a theoretical analysis of a heat sink is presented to pursue the maximum thermal dissipation and the least material cost. Due to the general derivation, the longitudinal fin arrays on a heat sink can be arranged as either square, rectangular, equilaterally triangular, cylindrical, or annular cross-section. By inputting the dimensionless parameter, Biot number, shape parameter and the total mass, the heat balance equation is derived in transcendental fo...

Chun-Lin Fu, 傅俊霖

碩士 / 大同大學 / 機械工程學系(所) / 99 / In this thesis, we investigate heat transfer performance of zeroth-level-bifurcation tree-shaped fins under the constraint of a fixed heat flux and the total volume of fins. We studied the effects of the number of fins (N), the orientation of fins, the width ratio between thin fins and the thick fin (D2/D1), the height of the thick fin (h/H), and Reynolds number (Re) on the thermal performance of tree fins. We find that increasing Reynolds number can enhance the hea...

Zhi-cheng, Liang, 梁致誠

碩士 / 國立勤益科技大學 / 冷凍空調系 / 99 / The X-type slit fin and tube heat exchangers with different slit highs are studied numerically. The heat exchangers with two rows(single and double), two fin pitches(1.21㎜、2.5㎜) and three different slit highs（1/3Fp、1/2 Fp、2/3 Fp）are considered in the analysis. The air velocities are varied from 0.5m/s to 6m/s to see the effect of wind velocity on the heat transfer and pressure drop of the heat exchangers under different slit high. The heat exchanger with different fi...

Jun-Jie, Lin, 林俊傑

碩士 / 國立勤益科技大學 / 冷凍空調系 / 97 / The fin and tube heat exchangers with staggered tube are investigated numerically in the study. The parameters studied include row number, fin type, slit fin division number and fin pitch. The inlet air velocity is increased from 0.25m/s to 6.5m/s to examine the parameter influences upon heat transfer and pressure drop under different air velocity. The effects of offset strip and tube in different row upon heat transfer are also analyzed through numerical simulation ...

Lee, Yueh-Hung, 李岳鴻

碩士 / 遠東科技大學 / 機械工程研究所 / 100 / This paper discusses the heat transfer characteristics of air impinging jet on plate heat sink. Way of a fixed heat flux, the heat source heating the center of the plate heat sink below; nozzle placed above the heat sink, the air through the nozzle, the impinging of the cooling fins on the flatbed, the cold fluid into the fin gap in the heat bring out, in order to achieve the cooling of purpose. In this study, a numerical simulation to explore the flat plate heat si...

Young-Ming Hwang, 黃永明

碩士 / 元智大學 / 機械工程研究所 / 89 / In the present study, sixteen herringbone wavy fin-and-tube heat exchangers were tested. For type Ⅰ exchangers ( , ), the effect of tube row and fin spacing on the air-side performance is not significant; while the effect is pronounced at high Reynolds number. However, the effect of tube row and fin spacing on the air-side performance is very important for type Ⅱ heat exchangers ( , ). In these two types of heat exchangers, the maximum phenomenon was found at low Reyno...

Yah-Dean Tsay, 蔡亞典

碩士 / 大同工學院 / 機械工程研究所 / 87 / Among all the modern high-tech products, the electronic devices are more and more prevailing. Therefore, how to remove the heat generated during its operation to make sure of the stability of the product is becoming a very important issue of the recent researches. The most commonly used method for electronic cooling is to add one set of heat sink assembly on the heating component. However, different shapes and configurations of the heat sink can make their performance...

王榮昌

碩士 / 國立成功大學 / 機械工程學系 / 85 / The heat transfer coefficient of the plate finned-tube heat exchanger is searched mainly in this thesis. Since the field of fluid that flows across fins is very complex. The previous scholars is to simplify the complexity of the problem so as to be the constant for the heat transfer coefficient of the fluid. In fact, the heat transfer coefficient should be the function of location. We will tell the difference from the heat transfer coefficient as to be the functio...

Fan ,Chen-Jyh, 范振智

碩士 / 國立海洋大學 / 船舶機械工程學系 / 83 / This study presents the optimum design of fins at he same heat duty and base temperature in order to obtain the smallest volume to reach the economical consideration. First of all, excavated fins with heat transfer at the end are investigated. Optimum profile with the corresponding temperature distribution is obtained when they are subject to a single mode of heat transfer by u...

Mu-Cheng Wu, 吳目誠

碩士 / 國立成功大學 / 機械工程研究所 / 83 / Fluid flow and heat transfer in a plate-fin and tube heat exchanger were studied numerically. Flow is incompressible, three-dimensional and laminar. A commercial PHOENICS code which is based on the SIMPLE algorithm are used to solve a set of nonlinear partial differential equations. The effects of different geometrical parameters such as tube arrangement, tube row numbers, fin p...

Sie-Uion Lain, 連士元

碩士 / 國立成功大學 / 機械工程研究所 / 83 / There are two parts in this paper,for the first part of this paper, an induced wind tunnel and air conditionung system were used to measure the performance on heat transfer and pressure friction factor for the dry coils and the wet coils of nine plate-fin and tube heat exchangers with different fin pitch and tube outside daimeter.The ambient temperature and humidity are controll...

HUANG, ZHI-DE, 黃智德

碩士 / 國立交通大學 / 機械工程研究所 / 73 /

Fang-Ping Hu, 胡芳賓

碩士 / 國立成功大學 / 機械工程研究所 / 82 /

Yang-ping Liu, 劉泱凭

碩士 / 雲林科技大學 / 機械工程系碩士班 / 98 / This study examines the airside performance of heat sinks having fin patterns of plate fin, dimple vortex generator fin, cannelure fin, and dimple vortex generator with cannelure fin. In the previous investigations, although the dimple vortex generator fins to increase heat transfer performance, but it also has a relatively large pressure drop. Thus, they need a greater impetus to drive the fluid. The performance of heat transfer and pressure drop for a dimple plate...

Hao-Wei Lan, 藍浩瑋

碩士 / 臺灣大學 / 機械工程學研究所 / 98 / Previous studies show that the lighting quality of LED largely depends on operating temperature. LED without thermal management may fail early due to thermal runaway, epoxy degradation, and thermal stress under high-operating temperatures. In this study, the performance of a honeycomb heat sink was investigated by experimentation and three-dimensional numerical models. Two kinds of honeycomb models were proposed to demonstrate the performance of a heat sink with singl...