• 專題生
  • 研究生
  • 實習生
  • 前成員
  • 專題生

    • 謝勛丞

      Email:

      研究領域:

      研究成果:

    • 林芷伃【2016專題生】

      Email:hellojulielin@gmail.com

      研究領域:

      Biomass Energy & Technology 

      • Biomass supercritical water gasification for hydrogen production
      • Energy economics

      研究成果:

      【2016】獲國立成功大學能源科技與策略研究中心 大專生參與能源主題研究計畫競賽 第三名

      【專題主題】Cost Estimation of Hydrogen Generation from Palm Oil Waste via Supercritical Water Gasification

      This study focuses on the economic viability of converting oil palm waste, particularly empty fruit bunch (EFB), to hydrogen via supercritical water gasification (SCWG). Biomass supercritical water gasification technology remains in R&D stage and commercial plants have yet to exist. Many studies have performed analysis on the technical aspects but few works study the economic aspects of such technology, which is also vital for commercialization. Moreover, cost analysis varies greatly with different assumptions and considerations. With respect to this, our work estimated the cost of a supercritical water gasification plant in Malaysia. 

    • 簡成晏【2017專題生】

      Email:f04036104@mail.ncku.edu.tw

      研究領域:

      Biomass Energy & Technology 

      • Low-tar biomass gasification technology
      • Biomass energy optimization
      • Micro gas turbine power system fueled with biofuel

      研究成果:

      【專題主題】生質燃氣用於氣渦輪引擎航空模型之微型發電

      隨著溫室效應造成的嚴重全球氣候變遷,人類正在積極地利用科學技術減少二氧化碳的排放,同時也必須確保能源需求。為改善能源資源短缺的問題,生質氣化合成氣在熱機的運用是一種很合適的解決辦法,並且,其可減少廢氣對於環境的污染。生質物氣化是以氧氣、水蒸氣等作為介質,在高溫環境下與生質物反應,產生可燃氣體的過程,而產物主要為一氧化碳、氫氣和少量的甲烷,稱為合成氣。然而,生質氣化合成氣的應用與一般天然氣相比,其缺點在於低溫時的可燃性以及放熱量,通常會遇到的問題在於若可燃性不足,在引擎的燃燒室內無法成功點火,引擎則無法運轉。

      本計畫欲將針對台灣常見的生質物料或農業廢棄物自製生產生質氣化合成氣,進行氣化合成氣熱值與燃氣性質分析,並以商用微型渦輪引擎進行生質氣化合成氣燃燒測試或修改微型渦輪引擎的燃燒室設計,設計一適用於微型渦輪引擎的發電系統,達到利用生質物發電結合分散式發電系統應用的可能性分析與示範。

      【成果海報】

    • 嚴心妤【2018專題生】

      Email:cba9654117@gmail.com

      研究領域:

      Biomass Energy & Technology 

      • Energy regeneration of biomass waste
      • Oxy-combustion characteristics of biomass waste cofired with coal

      研究成果:

    • 蔡馨慧【2018專題生】

      Email:judytsai0@gmail.com

      研究領域:

      Biomass Energy & Technology 

      • Energy regeneration of biomass waste
      • Oxy-combustion characteristics of biomass waste cofired with coal

      研究成果:

    • 許子諾【2017專題生】

      Email:arnoshu1995@hotmail.com

      研究領域:

      Micro Combustion Technology & Application 

      • LHV fuel catalyst combustion
      • Bio-syngas combustion
      • Micro gas turbine system fueled with bio-fuels

       

      研究成果:

      【2018】賀!!! 獲國立成功大學航空太空系 論文研究專題 第一名!

      【專題主題】生質燃氣應用於熱光電暨史特林引擎複合發電系統

      為了提供離島地區或偏遠鄉鎮的居民用電需求,本計畫擬將農業廢棄物進行發酵或氣化化學程序,以產生生質燃氣,生質燃氣的組成以氫氣、一氧化碳、甲烷為主。因此,這研究係設計一微型觸媒燃燒器將氫氣與甲烷進行燃燒,所產生的化學能將白金管加熱至白炙狀態,再利用熱光電板將輻射器所產生的光轉成電力輸出,此外,高溫廢氣接史特林引擎,進行獵能回收,目前整理效率(包含電力輸出與熱水輸出)大約為20%。

      【成果海報】

    • 林彥夫【2018專題生】

      Email:sml860709@gmail.com

      研究領域:

      Electric Propulsion Technology

      • Design, fabrication and demonstration of micro Arc-jet
      • Plasma diagnostic system

      研究成果:

    • 李宣【2018專題生】

      Email:zxc1235807@gmail.com

      研究領域:

      微氣渦輪引擎設計、製作與示範

      • 壓縮段的渦輪葉片設計、模擬與測試
      • 微渦輪引擎壓縮段與燃燒室的製作與測試

      研究成果:

      A new method for designing various series of centrifugal comptessor impellers

      A new method has been developed to design centrifugal compressor impeller. It provides quick and robust guidline for designers. By simply selecting a set of input parameters, it can generate series of impellers of different performance for further optimization.

      The method integrates an own developed program - IMPELLER 1D DESIGN and commercial software - ANSYS to generate suitable impellers. This paper will demonstrate an application example of this method for designing an optimized micro centrifugal compressor impeller. The method is validated by experiment test and CFD simulation.

    • 林品安【2018專題生】

      Email:pypy46146@gmail.com

      研究領域:

      微型電力推進系統設計、製作與示範

      • 微型離子引擎設計、製作與測試
      • 介入式電漿量測系統建立

      研究成果:

      【2019】賀!!! 獲國立成功大學航空太空系暨能源學室學位學程 論文研究專題 第一名!

       

    • 龔俊瑋【2017專題生】

      Email:j2855001@gmail.com

      研究領域:

      Micro gas turbine engine system

      • Design if centrifugal compressor impeller
      • Testing the compressor and combustor section of micro gas turbine engine
      • design, fabrication and demonstration of micro gas turbine engine

       

      研究成果:

      A new method for designing various series of centrifugal comptessor impellers

      A new method has been developed to design centrifugal compressor impeller. It provides quick and robust guidline for designers. By simply selecting a set of input parameters, it can generate series of impellers of different performance for further optimization.

      The method integrates an own developed program - IMPELLER 1D DESIGN and commercial software - ANSYS to generate suitable impellers. This paper will demonstrate an application example of this method for designing an optimized micro centrifugal compressor impeller. The method is validated by experiment test and CFD simulation.

      【2018】 參加國際會議: 3rd South East Asia Workshio in Aerospace Engineering, 地點: 曼谷,泰國

      A New Method for Designing Various Series of Centrifugal Compressor Impellers【口頭報告】

      A new 1D method has been developed for the design of centrifugal compressor impeller. It provides quick and robust guideline for designers. By simply selecting a set of input parameters, engineers can use it to generate series of impellers for different performance or for further optimization. The method integrates an in-house program “IMPELLER 1D DESIGN” and the commercial software ANSYS to generate suitable impellers. An example of designing an optimized micro centrifugal compressor impeller has been demonstrated, and the results are validated by experiment and CFD simulation.

  • 研究生

    • 陳俊翰

      博士生

      Email:adw4413@gmail.com

      研究領域:

      基礎燃燒與火焰研究

      • 高能氧化基甲烷預混火焰
      • 雷射診測技術
      • CFD數值模擬

      研究成果:

      【2017】 參加國際會議: 12th Int'l Symposium on Advanced Science and Technology in Experimental Mechanics, 地點: 金澤,日本

      Flame Modes and Combustion Characteristics of a Triple Port Burner 【口頭報告】

       Increasing concerns of issues on global warming and climate change have urged stringent expectation on new energy conversion devices for much higher thermal efficiency and carbon dioxide capture and sequestration. Considering the practicability and safety, multi-port burners are widely used in industry to achieve the purpose of safety and emission control. Therefore, in this study co-annular triple port burner was used to investigate the flame phenomenon. The flame phenomenon was observed by varying the velocity of oxidizer stream (mixture of N2 and O2) and oxygen concentration ratio in central In addition, the hysteresis of flame was also observed by means of adjusting flow velocities in the central tube. Flame images showed that the increase in the velocity of oxidizer stream can effectively inhibit the soot formation before the presence of the inverse diffusion flame.(IDF) The flame modes were classified into six types, namely normal diffusion flame, partially-premised flame, closed-tip inverse diffusion flame, opened-tip inverse diffusion flame, lifted-off edge flame and plume flame, respectively. Except for normal diffusion flame and partially-premixed flame, flames consist of two triple flame structures stemming from inner and outer annual tube, that is, inner triple flame and outer triple flame. Especially, the positions of rich-premixed branch for inner and outer triple flames were reverse because of the layout of the oxidizer stream and fuel stream. The rich-premixed branches for inner flame and outer flame were merged in the downstream and meanwhile trapped soot in flame. It explains the flame with opened-tip and bright flame.

       

      The visible flame appearances for Ω=60% with varying R (a) from 0 to 10 and (b) from 10 to 0.

       

      【2017】獲教育部 2017年全國能源科技創意實作競賽 【銀牌】

      【2019】  參加國際會議: 9th European Combustion Meeting, 地點: 里斯本,葡萄牙

      Effects of Diluent Addition on Combustion Characteristics of Methane/Nitrous Oxide Inverse Diffusion Flame 【海報報告】

      The purpose of this study was to examine the combustion characteristics of CH4 /N2O IDF with different dilution gases. In the experiment, a mixture of nitrous oxide and different dilution gases (Ar, He, CO2 ) were introduced through the central tube, the second port was introduced with methane fuel, and the outer port was introduced with a mixture of 33% O2 and 67% N2. To understand the effect of the initial addition of dilution gas on the combustion characteristics, CHEMKIN-PRO was used to conduct a more in-depth discussion on the flame structure, temperature, pollutant emission, and pollutant generation mechanism for the addition of dilution gas. With the addition of different dilution gases, there are several different flame features, that is, normal diffusion flame, closed-tip inverse diffusion flame, opened-tip inverse diffusion flame, liftoff flame. In the numerical simulation part, the thermal/diffusion effect dominated the rise of flame temperature with the addition of Ar conditions, while the inert effect and chemical effect dominated the flame temperature drop with the addition of Ar and CO2 as the diluent gas conditions.

    • 王彥儒

      博士生

      Email:wangyanru428@gmail.com

      研究領域:

      生質能源動力系統暨優化技術

      • 生質能源技術
      • Kriging 代理模型
      • 序列式建模

      ​碩士論文題目: 以序列式採樣建立代理模型以優化生質料焙燒條件

      The purpose of this research is to use the Kriging surrogate model and sequential sampling to optimize the torrefaction conditions of biomass, and to compare with the results of the Taguchi method. The empty fruit bunch (EFB) and palm kernel shell (PKS) were selected to torrefy under four torrefaction conditions, and the PA index was calculated. The PA index is an index established by proximate analysis, and its value reflects the flammability of the biochar or biomass. Through the surrogate model and sequential sampling to find the torrefaction condition of the maximal PA index with fewer experiments. The EFB case shows that the number of experiment surrogate model need for optimization can indeed be less than the number required by the Taguchi method, but because of the linear relationship between its PA index and parameters, the extreme value is located at the upper and lower limits of the parameter range, so the Taguchi method is used to optimize EFB cases can also find the best conditions in the whole parameter domain. In the case of PKS, it can be seen that the optimization result of the surrogate model is guaranteed to be the global solution in the whole parameter domain. If the Taguchi method is used to design factor levels with the same number of experiments, it will result in the optimization result of the Taguchi method is the local solution. The Taguchi method needs more experiments than the surrogate model to find the optimal conditions similar to the result of the surrogate model.

      研究成果:

      【2018】獲科技部107年度-補助國內研究生出席國際學術會議: 10th Int'l Conference on Applied Energy, 地點: 香港,中國

      Combustion Behavior of Australian Coal Blended with Torrefied Alee Trees 【口頭報告】

       Since the industrial revolution, the concentration of carbon dioxide in the atmosphere has been unprecedentedly rising. Burning of traditional fossil fuels for thermal and power generation results into the increase of greenhouse gases emission. In order to effectively achieve carbon dioxide abatement, the strategy of partially replacing coal with biomass as carbon neutral has become a trend globally. However, the solid fuel properties between raw materials and coal are very distinct. Torrefaction, considered as one of thermal degradation process, can effectively improve the grindability, hydrophobicity and heating value of solid fuel. In this study, Taguchi method was employed to probe the optimization parameters of Alee trees torrefaction process for maximizing the solid combustion, evaluating via the criterion of comprehensive combustion characteristics index (S Index) and the combination index derived from proximate analysis.

       

    • 古仁義

      博士生

      Email:sareddy.kullaireddy3173@gmail.com

      研究領域:

      基礎燃燒與火焰研究

      • 計算流體力學
      • 對沖預混火焰模擬與實驗分析
      • 雷射診測技術:PLIF、LII

      研究成果:

      【2017】 參加國際會議: 3rd Engineering Energy Alliance Forum, 地點: 曼谷,泰國

      Optimizing the Operating Parameters of Torrefaction Process on the Combustion Enhancement of Coal/Biochar Blended Fuels【口頭報告】

      Although the biomass is regarded as a suitable alternative fuel, its fuel property and combustion characteristics are much different from fossil fuel. Compared to fossil fuel, biomass is harmful to combustion due to its high moisture content, hygroscopic behavior, low energy density and low grindability. Accordingly, torrefaction was used to improve these disadvantages. However, operating parameters of torrefaction process are associated with the fuel property of biochar and coal/biochar co-combustion. Therefore, the Taguchi method was utilized to reduce the experimental runs and search for the optimum condition of torrefaction process. The produced biochar would blend with pulverized coal at 50% on gravimetric basis. Comparing the combustion behavior among the pulverized coal, biochar, and blended fuels, a thermogravimetric analyzer was used to observe weight loss of fuel from ambient temperature to high temperatures at fixed heating rate. Then, intersection method and fuel conversion were used to find the ignition temperature and burnout temperature. The results showed the ignition temperature and burnout temperature of blended fuel would occur earlier than pulverized coal. In addition, the fuels were compressed as pellets and carried out combustion experiment in a practical system. The blended fuel has longer volatile combustion due to more volatile matter contained, while pulverized coal contained more fixed carbon results in persisting longer time during char combustion. The results showed that the coal/biochar blended fuel can effectively enhance the fuel conversion rate and combustion characteristic index. Furthermore, the results can be applied to co-firing in large scale boilers in the future.

    • 林宏儒

      博士生

      Email:linrainbowsky000@gmail.com

      研究領域:

      研究成果:

    • 李天

      碩士生

      Email:gildas.mourot@ipsa.fr

      研究領域:

      研究成果:

    • Marion DENHAUT [李云]

      碩士生

      Email:marion.denhaut@ipsa.fr

      研究領域:

      Electric Propulsion : 

      • Pulsed Plasma Thruster
      • Plasma Measurement System
      • Miniaturizing Electric Propulsion System

      研究成果:

    • 劉勝文

      碩士生

      Email:cyliu59@gmail.com

      研究領域:

      電力式推進系統

      • 脈衝式電漿推進系統
      • 電漿量測
      • 電力推進系統微型化

      研究成果:

      【2019】參加國際會議: 4th Southeast Asia Workshop on Aerospace Engineering, 地點: 吉隆坡,馬來西亞

      Effect of Segment Electrodes on the Thruster Improvement of Pulsed Plasma Thruster System 【口頭報告】

      The development of micro pulsed plasma thruster (PPT) is used for the attitude control and position-keeping of cubic satellites or interplanetary expeditions. Characteristically, the pulsed plasma thruster features a high specific pulse and low power electric thruster. The pulsed plasma thruster capitalizes on the interaction of electric field and magnetic field to accelerate ion particles, resulting in thrust output. In the previous result, Teflon was used as a propellant in the PPT prototype, and pulse plasma plume was successfully generated and observed. In order to improve the thrust performance of the PPT, the second segmentation of the electrode set was incorporated in the PPT prototype, ensuing right after the first segment electrode. It is so-called dual-PPT. In order to install second segment electrode in the PPT, the design of igniter position and electrode deployment in dual-PPT was tailored accordingly. The purpose of this study is aimed to understand the effect of late ablative particle on the overall efficiency of PPT and delineate the influence of second segment electrode placement on the discharging process. Consequently, the effects of discharging time, power input and electrode configuration for second segment electrodes on overall performance of PPT were discussed in the study.

    • 干孝凱

      碩士生

      Email:kx4011223@gmail.com

      研究領域:

      生質炭/煤炭混燒火焰特性研究

      • 生質炭混燒的熱裂解對衝式淨煤燃燒爐
      • 粒子影像測速量測系統 

      研究成果:

      【2019】參加國際會議: 4th Southeast Asia Workshop on Aerospace Engineering, 地點: 吉隆坡,馬來西亞

      Effect of Electrode Resistance and Electrode Gap Distance on Discharge of Micro Vacuum Arc Thruster 【口頭報告】

      This study focused on the development of a vacuum cathode arc thruster (VAT), particularly on its design, manufacturing process, and demonstration. Characteristically, the proposed thruster does not require any additional propellant feeding system as the cathode electrode is simultaneously used as a propellant. In the ignition system, tiny spots are coated on the cathode surface to induce plasma flow. A “trigger-less” method with an inductor storage power system was used for generating the pulsed plasma. This discharge method can significantly reduce input power. However, the anode-cathode resistance and the gap between anode and cathode are associated with the nature of potential thruster failure. In order to delineate this feature, two rectangular electrodes on an alumina ceramic plate were used to analyze these parameters by checking VAT lifetime. In addition, a high-speed camera was used to capture the evolution of plasma generation.

    • 謝志鑫

      碩士生

      Email:jz2966@gmail.com

      研究領域:

      生質能源及其應用

      • 生質能源
      • 生質炭混燒技術
      • 流體化床燃燒技術
      • 廢棄物能源再利用

      研究成果:

      【2019】參加國際會議: 12th Asia-Pacific Conference on Combustion, 地點: 福岡,日本

      Combustion Behavior Optimization of Torrefied Woody Biomass with Proximate and Element Analysis Index 【口頭報告】

      Since the industrial revolution, the concentration of carbon dioxide in the atmosphere has been unprecedentedly rising. Burning of traditional fossil fuels for thermal and power generation results in the increase of greenhouse gases emission. In order to effectively achieve carbon dioxide abatement, the strategy of partially replacing coal with biomass as carbon neutral has become a trend globally. However, the solid fuel properties between raw materials and coal are very distinct. Torrefaction, considered as one of thermal degradation process, can effectively improve the grindability, hydrophobicity, and heating value of solid fuel. In this study, Taguchi method was employed to probe the optimization parameters of Alee trees torrefaction process for maximizing the solid combustion, evaluating via the criterion of the combination index derived from proximate analysis and element analysis. EFB is chosen as another material to validate the variability of the two developed indexe

    • 陳怡蒨

      碩士生

      Email:lucario7129@gmail.com

      研究領域:

      研究成果:

    • 許中豪

      碩士生

      Email:s0981661567@gmail.com

      研究領域:

      基礎火焰燃燒

      - 噴霧火焰燃燒

      - 生質燃油混摻燃燒

      碩士論文題目:水熱液化油混摻柴油燃燒之可行性分析與應用

      水熱液化油屬於碳中和燃料,其具有高熱值、低含氧量及低含水率之特性,優於傳統熱快速裂解油。若將水熱液化油添加於現行柴油並應用於柴油發電機,除可增加工業燃料多元化,亦可減少CO2的排放量。因此,計畫目標為架設一柴油燃燒試驗系統,進行柴油單獨燃燒及柴油與生質物水熱液化油 混燒試驗,觀察燃燒火焰結構,並測量污染物濃度,以得知其燃燒效率及排放特性,以做為未來水熱液化油替代柴油在工業上混燒應用之參考。

      研究成果:

      【2018】  參加國際會議: 4th International Conference on Green Technology and Sustainable Development, 地點: 胡志明市,越南

      Experimental studies on Heating and Burning of characterized Heavy fuel blended oil 【口頭報告】

      Heavy fuel oil (HFO) obtained from crude oil distillation is a widely used fuel in marine engines, industrial steam boiler, and power generation technologies. In the present study, the combustion characteristics and the corresponding efficiency of heavy oil are investigated. Further research on heavy oil is developed by adding the content of liquefaction bio-oil (LBO), because of its complex nature. So as to better understanding of the combustion characteristics and gas emission of HFO blended with liquefaction bio-oil,  TGA-FTIR, Single droplet, Gas Analyzer, and Spray Combustor was employed. All the required techniques were used to investigate heavy fuel blended oil (Mixture of HFOand LBO) combustion behavior with various LBO addition of 3%, 5%, and 10%. Single droplet and spray combustion experiments of HFO with LBO addition are used to investigate the evaporation rate, combustion behavior, and flue gas emission.  The single suspended droplet experiment is to investigate the effect of LBO addition in HFO on the fuel evaporation and assess the possibility of induced micro explosion. The experiment of HFO combustion was performed using the optimized-design Nozzle and combustor presented a lab-scale stable diffusion flame, which it is convenient to employ laser diagnostics and in-situ gas emission measurement.

    • 林俊憲

      碩士生

      Email:lin55946540@gmail.com

      研究領域:

       

      微型複合式電熱共生系統

      • 微動力系統設計
      • 微燃燒基礎火焰分析
      • 熱光電暨史特林引擎熱電聯產系統

       

      研究成果:

      [2019]  參加國際會議: 9th European Combustion Meeting, 地點: 里斯本,葡萄牙

      Combustion Characteristics of Diesel Blended with Sludge-Derived Hydrothermal Liquefaction Oil and Its Application [海報報告]

      Hydrothermal liquefaction oil is a carbon neutral fuel with high calorific value, low oxygen content and low water content, which is superior to traditional thermal fast cracking oil. If hydrothermal liquefaction oil is added to  diesel fuel and applied to diesel engines, it can increase the diversification of industrial fuels and reduce CO2 emissions. Therefore, the research objective is to set up a system for diesel and diesel blend with 5% sludge hydrothermal liquefaction bio-oil combustion test, observe the combustion flame structure, and measure the pollutant concentration to know its combustion efficiency and emission characteristics. As a reference for the future use of hydrothermal liquefaction oil instead of diesel in industrial co-firing applications.

    • 高孝瑄

      碩士生

      Email:a0917987743@gmail.com

      研究領域:

      微型燃燒系統

      • 微動力系統設計
      • 微燃燒基礎火焰分析
      • 計算流體力學模擬

      研究成果:

    • 翁瑋成

      碩士生

      Email:adsl60468@gmail.com

      研究領域:

      電力式推進系統

      • 脈衝式電漿推進系統
      • 電漿量測
      • 電力推進系統微型化

      研究成果:

    • 黃達言

      碩士生

      Email:darren0202999@gmail.com

      研究領域:

      電力式推進系統

      • 脈衝式電漿推進系統
      • 電漿量測
      • 電力推進系統微型化

      研究成果:

    • 梁晉維

      碩士生

      Email:kevin968512@gmail.com

      研究領域:

      研究成果:

    • 多亞立

      碩士生

      Email:ariezpurwanto@gmail.com

      研究領域:

      研究成果:

    • 林伯鴻

      碩士生

      Email:lwianyy@gmail.com

      研究領域:

      研究成果:

    • 莊博丞

      碩士生

      Email:heyyoha15@gmail.com

      研究領域:

      研究成果:

    • 黃丙翰

      碩士生

      Email:ha0408nkhank@gmail.com

      研究領域:

      研究成果:

    • 蔡文淵

      碩士生

      Email:wayne870604@gmail.com

      研究領域:

      研究成果:

  • 實習生

    • Romboon Sakulkarunaa 【2018】

      Email:rmbn@icloud.com

      實習期間:2018/06/01~2018/07/31

      國籍:Thailand

      研究主題:

      Combustion behavior of heavy oil blended with bio-oil

    • Luc JOURDAIN【2018】

      Email:luc.jourdain@ensta-bretagne.org

      實習期間:2018/06/18~2018/09/17

      國籍:France/法國

      研究主題:

      Optical temperature measurement: two-colour pyrometry

    • Nunthawat SINGCHAI 【2018】

      Email:nunthawatsingchai@gmail.com

      實習期間:2018/06/01~2018/07/31

      國籍:Thailand/泰國

      研究主題:

      Performance Testing of Micro Vacuum Cathode Arc Thruster

    • Chanapum SUBHAKORN 【2018】

      Email:sbk.palm@outlook.com

      實習期間:2018/11/17~2019/01/31

      國籍:Thailand/泰國

      研究主題:

      Design, Fabrication & Demonstration of Micro Vacuum Cathode Arc Thruster

    • Phoowis GIJSRIURAI 【2018】

      Email:phoowis@hotmail.com

      實習期間:2018/11/17~2019/01/31

      國籍:Thailand/泰國

      研究主題:

      Design, Fabrication & Demonstration of Micro Vacuum Cathode Arc Thruster

       

       

    • Antara MENZEL 【2018】

      Email:antara.barbara@gmail.com

      實習期間:2018/2/19~2018/8/19

      國籍:France/法國

      研究主題:

      Development of Micro-scale Pulsed Plasma Thruster for 3U CubeSAT

    • Damien MICHAUD【2018】

      Email:damien.michaud.31@gmail.com

      實習期間:2018/06/18~2018/09/08

      國籍:France/法國

      研究主題:

      Development of micro-scale gas-initiated pulse plasma thruster: design of gas propellant feeding system 

    • Etienne TESTARD 【2018】

      Email:etienne.testard@ensta-bretagne.org

      實習期間:2019/6/08 - 2019/8/30

      國籍:France

      研究主題:

    • Thammathada Wongnak

      Email:thammathada.w@ku.th

      實習期間:2019/12/6-2020/6/21

      國籍:Thailand/泰國

      研究主題:

      Development of Vacuum-Cathode-Arc-Ignited Pulsed Plasma Thruster

    • Nicolas PERZO【2016】

      Email:nicolas.perzo@ipsa.fr

      實習期間:2016/6/15~2016/9/15

      國籍:France/法國

      研究主題:

      Design the electrical/chemical duel -mode propulsion chamber

       

    • Poonyisa PANJATANSAK 【2018】

      Email:poonkus40@gmail.com

      實習期間:2018/11/17~2019/01/31

      國籍:Thailand/泰國

      研究主題:

      Design, Fabrication & Demonstration of Micro Vacuum Cathode Arc Thruster

    • Siridon CHANGKASIRI 【2018】

      Email:changkasiri.peter@gmail.com

      實習期間:2018/11/17~2019/01/31

      國籍:Thailand/泰國

      研究主題:

      Design, Fabrication & Demonstration of Micro Vacuum Cathode Arc Thruster

    • Amandine Lavaud 【2019】

      Email:amandine.lavaud@ipsa.fr

      實習期間:2019/6/10-2019/9/6

      國籍:France

      研究主題:

      The Effect of Nozzle Angle on the Plasma Proprogation in Pulsed Plasma Thruster

    • Nateekan JAREONSOOK【2017】

      Email:tong_kssc@hotmail.com

      實習期間:2017/1/15~2017/5/16

      國籍:Thailand/泰國

      研究主題:

      Smart Farming Unmanned Aerial Vehicle using Both Lithium-Polymer Battery and Solar Power

    • Thibault HENRY 【2018】

      Email:thibault.henry-greard@ensta-bretagne.org

      實習期間:2018/06/14~2018/08/24

      國籍:France/法國

      研究主題:

      Simluation of Inverse Diffuse Flame via STARTCCM+

    • Victor URBIETA【2017】

      Email:victor.urbieta-martin@ipsa.fr

      實習期間:2017/8/28~2017/9/22

      國籍:France/法國

      研究主題:

      Preliminary design of two-stage pulsed plasma thruster

       

    • Chandhawat BOONYARD【2017】

      Email:earthoz.pdn@gmail.com

      實習期間:2017/1/15~2017/5/16

      國籍:Thailand/泰國

      研究主題:

      Smart Farming Unmanned Aerial Vehicle using both lithium-polymer battery and solar power

    • Wattanakorn INTANON【2017】

      Email:inta495@gmail.com

      實習期間:2017/1/15~2017/5/16

      國籍:Thailand/泰國

      研究主題:

      Smart Farming Unmanned Aerial Vehicle using both lithium-polymer battery and solar power

    • 西原 琢矢【2019】

      Email:t151844@edu.tut.ac.jp

      實習期間:2019/01/07~2019/02/22

      國籍:Japan/日本

      研究主題:

      Design, Fabrication & Demonstration of Micro Combustion for Thermophotovolatic Power System

  • 前成員

    • 蕾蕾

      Email:royer.clem@gmail.com

      畢業日期:2018/7/31

      研究領域:

      電力式推進系統

      • 微型電力推進系統
      • 電漿量測系統
      • 微推力量測系統

      研究成果:

      【2017】 成功大學航空太空系實習報告, 地點: 台南,臺灣

      Development of Micro-Scale Plasma Thruster for CubeSAT 【實習報告

      CubeSATs are one of the fastest growing sectors in the soace industry, allowing for cheap access to space. ESA has funded a project involving Clyde Space Ltd, Mars Space Ltd and the university of Southampton to develop an adaptation of a two-stage PPT to perform drag compensation for a CubeSAT platform, with the aim of doubling the time needed for the CubeSAT to naturally de-orbit (hence doubling its lifetime). In this paper the mission requirements and the desifn process of this two-stage PPT will be presented.

      According to w-h diagram, w is selected as 1.5 cm and  h is selected as 2.7 cm.

       

      【2018】 成功大學航空太空系碩士論文   雙階脈波式電漿推進系統 

    • 席維廷

      Email:valentin.steichen@ipsa.fr

      畢業日期:2020/7/31

      研究領域:

      研究成果:

      【2020】 成功大學航空太空系碩士論文   應用陰極真空電弧觸發裝置於新型脈衝電漿推進器之研發 

      Pulsed Plasma Thruster (PPT) is a form of electric propulsion in which the plasma is accelerated by the interaction between pulsed current and self-induced magnetic fields to create thrust. PPT is one of the most promising electric propulsive thrusters for small satellites. As it is a low cost, simple in design, lightweight, and is consuming less power, it has excellent advantages for altitude control and station keeping. Nowadays, research is more focused on main aspects: optimization in geometry and feeding methods. In the frame of this study, a new type of PPT has been designed. This thruster used a new modified feeding and ignition system called a vacuum arc ignitor (VAI). This ignitor creates a plasma using the same mechanism as a vacuum arc thruster (VAT). The advantage of using the VAI is that it avoids a late-time ablation that reduces thruster performance and lifetime.

        The thruster was tested in high vacuum conditions (7X10^-5 Torr) with different electrical configurations. The results showed that depending on the voltage applied on the PPT electrodes, and its behavior is affected. It has been shown that over 1500 V, the time difference between the ignition and the primary discharge becomes more stable and consistent and leads to an improvement of the thruster reliability. In addition, using a high-speed camera and discharge current measurement, some hypotheses were raised regarding the physical process involved during the VAI−PPT pulse. 

    • 高瑋駿

      Email:kao0405@hotmail.com

      畢業日期:2017/7/31

      研究領域:

      太陽熱能及其應用

      • 太陽能熱水系統與其它節能產品結合設計
      • 熱泵系統
      • 暫態熱傳模擬與分析
      • 生命週期分析

      研究成果:

      【2017】 獲科技部106年度-補助國內研究生出席國際學術會議: 世界再生能源會議 地點:伯斯,澳大利亞

    • 楊宇婷

      Email:d798862007@gmail.com

      畢業日期:2019/8/31

      研究領域:

      太陽熱能及再生能源

      • 複合式太陽能熱水系統實驗與模擬
      • 計算流體力學 (TYNSYS、STAR CCM)

      研究成果:

      【2017】 參加國際會議: 2017 Solar World Congress, 地點: 阿布達比,阿拉伯聯合大公國

      The Study of Solar Combi-system Deployed in Aquatic Farm for Mitigating Hypothermia Damage Hypothermia Damage During Cold Stream Event 【口頭報告】

      Cold stream causes the death of fish and prawn in an aquatic farm due to hypothermia, and in the meantime results in the financial losses. In order to mitigate the economic loss from climate-related disasters, the concept of solar collectors and heat pump (HP) combi-system is employed in the aquatic farm to prevent the hypothermia of aquatic creature by maintaining the appropriate water temperature. However, it is unpractical to heat and maintain the total water temperature of the aquatic farm. Accordingly, providing a localized and appropriate water temperature zone in the water pool is a plausible solution in terms of technical and economic aspects, and aquatic creature would instinctively aggregate in the “survival zone”.  In this study, there are two software engaged, TRNSYS and FLUENT, respectively. FLUENT is employed to simulate the 3D temperature condition of aquatic farm in the extreme weather, and examine the distribution of survival zone in terms of heating location and capacity. TRNSYS 17 is used to optimize the combination of solar collector and heat pump under the required heating capacity.

      The temperature distibution of Case 2. ( left : y= -1.25m; right : y=-1m ; down : z=0m)

    • 蔡岳辰

      Email:wilymerchant@gmail.com

      畢業日期:2018/6/30

      研究領域:

      人工智慧與深度學習

      • 類神經網路
      • 監控診斷系統
      • 微渦輪扇發動機
      • MATLAB Toolbox

      碩士論文題目:運用人工智慧技術於微型燃氣渦輪發電機之錯誤與健康診斷模型

      生質能為全球第五大能源資源,相較於化石燃料的存量日益稀少,但價格確是飆漲。因此,使用生質燃氣於氣渦輪發電機組的方式日益普及。然而,氣渦輪發動機是一龐大且結構複雜之系統,在故障發生時,如何有效率地除錯是箇中關鍵。 傳統的故障診斷,只在故障發生後才能被識別,而PHM(Prognostics and Health Management)系統能夠預知分件或子系統的早期故障,並在這些故障發展擴大提前預警,提供採取有效措施的時間。有別於傳統PHM系統,本計畫將使用深度學習建立引擎的PHM系統,此系統可以監測生質燃氣微型渦輪發動機發電系統的運作狀態,並預測其剩餘有用壽命(remain usage life,RUL),可降低系統維修成本。

       

      研究成果:

          航空發動機在例行保養、修理和大修後,都必須經過地面試車台的驗證,而這些產生的大量數據對於描繪該具發動機的健康狀況是相當有價值的。為了更有效地使用記錄的發動機數據,本文評估了使用人工神經網絡(ANN)的主動式發動機診斷工具的可行性。以及闡述發動機健康監測並描述ANN背後的理論。

           任何發動機的性能都一定隨著操作時間而受到磨損的影響。其中有若干機制導致燃氣渦輪機的退化和潛在故障:如積聚污垢,腐蝕,氧化,異物損壞,磨損的軸承或密封,過大的葉片端部間隙,燃燒或翹曲的渦輪葉片或葉片,堵塞的燃料噴嘴,裂紋和翹曲的燃燒器,或裂化的轉子盤及葉片等等。

           過去以數學模型為主要依據的氣路分析法(Model-based Gaspath Analysis Method),一直是傳統監控發動機健康狀態與故障診斷的主要方法。然而,現有使用此方法的監控診斷軟體卻無法有效在日常修護中被普及使用。為此,本研究首先利用倒傳遞類神經網路法(Back-propagation Neural Network)來進行故障診斷技術的改善,並證實此網路的確提供了快速且有效的解決方法。其中用於網路訓練、測試的資料乃利用實際試車台上所蒐集並數據正規化的資料來做建模,發展出一套具有健康分類能力之監診系統應用於小推力渦輪風扇發動機。

       

      「神經網路」的圖片搜尋結果

    • 郭唯婕

      Email:betty1002006@gmail.com

      畢業日期:2019/6/30

      研究領域:

      生質能源及其應用

      • 生質能源
      • 生質炭混燒技術
      • 流體化床燃燒技術
      • 廢棄物能源再利用

      研究成果:

      【專題主題】提升生活固態廢棄物於能源領域的應用

      Since the industrial revolution, the concentration of carbon dioxide in the atmosphere has been unprecedentedly rising. Burning of traditional fossil fuels for thermal and power generation results into the increase of greenhouse gases. In order to effectively mitigate carbon dioxide emissions, the strategy of partially replace coal burning with nearly zero carbon emissions biomass has become a trend globally. However, the fuel properties between raw materials and coal are very distinct. Torrefaction can effectively improve fuel grindability, hydrophobicity and heating value. In this study, Taguchi method was employed to find out the optimization parameters of Alee trees torrefaction process for maximizing energy yield, heating value and comprehensive combustion characteristics index (S Index). The results show that torrefaction can raise heating value and enhance the ability to combustion.

      【2019】參加國際會議: 9th European Combustion Meeting, 地點: 里斯本,葡萄牙

      Combustion Behavior of Torrefied Biochar with Different Constitution of Cellulose Hemicellulose, and Lignin 【海報報告】

      Structural components differences of the biomass have an impact on the chemical reactivity. Different constitution of cellulose, hemicellulose, and lignin of the biomass will react differently towards thermal treatment. From previous research, temperature is the dominant factor regarding combustion behavior. However, the conversion of each fiber fraction remains unknown. The aim of this research is to study the influence of thermal pretreatment of biomass with different constitution of cellulose, hemicellulose, and lignin. Two biomass are chosen: alee tree (AT) and palm empty fruit bunch (EFB). Thermogravimetric Analyzer is used to investigate the complex transitions at different temperature. Proximate analysis and Ultimate analysis are discussed. Devolatilizing time, volatile burning time and char combustion time are determined through single pellet experiment. Those data are appropriate and informative for biochar-firing furnace.

    • 紀匱堯

      Email:guillaume.thiriet@ensta-bretagne.org

      畢業日期:

      研究領域:

      Development, measurements and simulation of a micro-combustor for bio-syngas combustion driven thermophotovoltaic power systems

      Abstract

      The main objective of this research project was to build a reliable numerical model of a new micro-combustor embedding a platinum plate as a catalyst in the middle. The catalytic and the gas-phase combustion reactions of the  mixture were investigated numerically using the CFD calculation software StarCCM+® while a micro-combustor was designed. Furthermore, the platinum plate was pierced in the middle in order to investigate the influence of the gas-exchanges between the two channels. The presence of a hole on the platinum plate allows the stabilisation of the flame acting as a flame hanger.

      The combustion reactions within the micro-combustor involve simultaneously homogeneous phase reactions in the channels as well as heterogeneous phase reactions over the platinum plate. Therefore, prior to build the micro-combustor numerical model, a literature review as well as a study of the main existing mechanisms was pursued in order to identify the more relevant ones as well as the appropriate set of parameters. First, the selected homogeneous phase reaction mechanism was validated reproducing the experimental results extracted from the Mrs. Ouimette Ph.D. Thesis in which different mechanisms for the /  homogeneous phase combustion reactions were evaluated and compared. Then, the selected heterogeneous phase reaction mechanism was validated reproducing the experimental results extracted from the Zheng et al. (2013) paper in which the catalytic oxidation of carbon monoxide over platinum was experimentally and numerically investigated. An ultimate validation of the two previous mechanisms was carried out by reproducing the experimental results extracted from the Ghermay et al. (2011) and the Schultze et al. (2015) paper about the oxidation reaction of CO in the presence of a H2/O2/N2 mixture under different conditions of equivalence ratio and pressure. The micro-combustor numerical model was finally built using the previously defined and validated mechanisms for the homogeneous and heterogeneous phase reactions as well as the associated hypothesis and parameters. The final model as well as the mesh convergence were finally detailed whereas the influence of the inlet mixture composition was numerically investigated.

      Along with this numerical study, a new micro-combustor based on the previously engineered one was designed and manufactured in order to solve the sealing defects encountered on the previous model. This new micro-combustor would then be submitted to experiments in order to determine its range of application as well as its efficiency.


      1.    State-of-the-art

      Thermophotovoltaics (TPVs) are a highly promising approach to convert heat into electricity via thermal infrared radiation. The heat to electricity conversion process is very close to the usual solar radiation to electricity one. The main difference between both processes relies on the fact that radiation is emitted from a heated body embedding in the TPV device in TPVs’ case [Cel – 2011] whereas radiation is emitted by the Sun in the case of a solar power generation device. In the case of TPVs, the emitter is placed very close to the photovoltaic (PV) cells so that the incoming radiation flux density and therefore the power density is close to that of solar PV cells [Zen – 1999] [Yan – 2002]. 

      A basic TPV device is made of:

      • A micro-combustor / micro-burner which produces heat via fuel combustion,
      • A thermal emitter which receives heat from the micro-combustor and converts it into radiation,
      • A photovoltaic diode cell which receives radiation coming from the thermal emitter and converts it into electricity.

      The band-pass filter showed in the figure n°1 is not compulsory to the proper functioning of the TPV device. However, it is highly recommended if a high TPV efficiency is to be reached. The IR band-pass filter transmits the useful radiant infrared energy that is in-band ( 1.7 µm to 0.65 µm) [Hor – 2002] emitted from the incandescent emitter to the PV-cells and reflects the remaining out-of-band radiation to the emitter which will then re-absorb it. The more the IR band-pass filter is efficient, the more it will reflect out-of-band radiation back to the thermal emitter. It is also compulsory to adapt the IR band-pass filter to the characteristics of the PV cells. In that respect, the PV cells only receive radiation whose wavelengths are distributed around the PV cell’s peak response which increases PV cells efficiency and deeply decreases energy losses by recycling radiation that PV cells cannot convert into electricity [Hor – 2002]. The use of a well appropriate IR band-pass filter as well as of an efficient design can considerably increase the TPV system efficiency till around 30 % yield which make them highly competitive power generation systems [Hor – 2002].

      The thermal emitter can be heated from several different ways. The most common and the one which is studied in this paper is the combustion of fossil fuels or syngas and bio-syngas. These fuels are easy of supply and allow stable and controllable heat sources with a very high energy density which also allow the conception of small-size devices [Kai – 2012] [Wu – 2016] [Yan – 2002]. Solar radiation and radioisotopes [Gri – 1965] can also act as heat-sources for the thermal emitter [Cel – 2011] [Zen – 1999] but they will not be considered here.

      However, TPVs’ efficiency-cost properties are still pretty weak compared to other power-generating technologies. TPVs are limited in their conversion efficiency by the Carnot efficiency law established in appendix n°6 but mostly by significant heat losses and radical terminations to the walls due to their high surface to volume ratio [Hor – 2002] [NPT – 2018] [Kim – 2006] [Li – 2012] [Yil – 2017]. Indeed, according to the cube-square law, as the size of the combustor is reduced by a factor 100, the surface and the volume will decrease respectively by four and six orders of magnitude respectively. Therefore, the surface to volume ratio will increase by a factor 100 which will considerably increase heat losses and thus the appearance of the quenching phenomenon [Yan – 2002]. In that respect, their fields of use are still limited to the world of research for an application to small-scale power generation systems for portable devices or to solar maintenance-free long term off grid power generation systems [Cel – 2011]. Moreover, usual thermal engines remain far more efficient than TPVs for the power supply of larger devices thanks to their low surface to volume ratio and therefore lower heat losses [Cel – 2011].

      The efficiency of a whole very simple TPV device without IR band-pass filter ranges from around 0.5 % to 2.2 % depending of the design of the TPVs as well as of the used materials, TPV cells, the presence of a catalyst… [Cel – 2011]. The performance of such a device relies heavily on the efficiency of the conversion of the radiative energy emitted by the thermal emitter into electricity via the use of PV cells. Usually, it is considered that the electrical conversion efficiency can reach 30 % for solar radiation whereas it only reaches 15% to 20% for the use of natural gas within a TPV device [Hor – 2002]. In that respect, George D. Cody et al. (1999) shows via fundamental calculations that for a black body thermal emitter temperature of 1200 K to 2500 K and  TPV cells, the maximum conversion efficiency varies from 30 % to 35 % and the power density from 5 to 80 W.cm-2. However, these results are overstated, and more reliable numerical models show that the efficiency as well as the power density should be around half of those got with the fundamental calculations [Cod – 1999]. These numerical results are corroborated by Matthias Zenker et al. (1999) for a black body thermal emitter at 1500 K and  TPV cells. In this study, an idealised model shows that the radiation conversion efficiency and the power density are 34 % and 2.2 W.cm-2 while a more realistic and reliable model shows that the radiation conversion efficiency and the power density value is 9.1 % and 1.2 W.cm-2 respectively [Zen – 1999]. In the same way, Lewis Fraas et al. (1999) shows via experiments that for a  (Syralmic 2000) thermal emitter temperature of 1723.15 K and  TPV cells, the radiation conversion efficiency and the power density reach 16.4 % and 2.5 W.cm-2 [Fra – 1999]. By the way, it was shown that the efficiency can be enhanced by increasing the temperature to reach about 21 % [Cel – 2011]. However, increasing the temperature also raises thermal stress and can lead to accelerated aging and then to the failure of the TPV device.

      These power densities must be compared with the current state of art of batteries. The table n°2 shows power densities of batteries assuming that they are functioning for one hour and that one of their dimensions (Length, width, depth) is 1 cm. It appears that TPVs have a power density about twice as large than the best Li-ion batteries.

      Moreover, batteries are also very bulky and heavy which make them quite inappropriate or inconvenient for many applications as low size batteries are not sufficient to supply small-scale devices with long time high density energy power. It can be added that batteries recharging time is pretty long while their operation time between recharging is quite small. In that respect, other sources of power need to be found and, in this context, the use of hydrocarbon fuels or syngas in combustion driven micro-power generation systems such as TPVs devices appears to be very promising [Yan – 2002] [Yan – 2010]. These latter can supply power while maintaining relatively small dimensions and are also easily and quickly refillable by changing the gas cartridges while their operation time remains comparable to that of batteries [Yan – 2010] [Kai – 2012]. From an ecological perspective, although batteries do not reject directly any green-house gases, they often do not last enough and are very difficult to recycle as they are made of heavy metals such as lithium or lead.

      By the way, TPVs appear to be very efficient for several classes of problem where standard engines are not usable because they are too expensive to be maintained in operation or not enough reliable [Cel – 2011]. In that respect, they are very interesting devices for long remote missions where highly reliable systems are necessary and in the same way, they are very encouraging devices for portable power-generation systems thanks to their high energy density and therefore their reduced weight and volume [Kai – 2012]. Furthermore, TPVs do not have moving parts [Li – 2013] [Wu – 2016] [Kai – 2012] [Li – 2009] [Yan – 2002] which make them relatively easy to manufacture and very quiet. Then, it also prevents the development of vibrations within the system, preserves the structural integrity and minimises heat dissipation through mechanical friction. In that respect, it considerably decreases the need of maintenance operations [Li – 2009] [Wu – 2016] [Kai – 2012]. Finally, although the electrical conversion of the radiative energy emitted from a thermal emitter heated by the combustion of methane, syngas or bio-syngas is lagged behind the electrical conversion of solar radiation (15-20% using gas combustion / 30% using solar radiation), TPV devices allow 24-hour operation which leads to better efficiency as well as extreme flexibility compared with the usual solar PV cells [Hor – 2002].

      In combustion-driven micro-power generation systems, the micro-combustor is with the thermal emitter and the PV cells, one of the main component of a micro-TPV device. In that respect, the efficiency of a TPV device is directly linked to the efficiency of the associated micro-combustor. However, considering the reduced size of the latter, several peculiar issues can appear and need to be solved in order to make micro-combustors and so on TPVs competitive [Lee – 2003]. Among others, the wall effects on the homogeneous phase mechanism are more pronounced due to heterogeneous reactions at the surface and the heat losses to the surrounding walls can also considerably decrease the efficiency of the micro-combustor leading to flame instability and then to thermal quenching [Lee – 2003].

      In that respect, considering the major issues that are ecology and power supply, the development, and the application of a micro-combustor for bio-syngas combustion driven portable thermophotovoltaic power system is a very interesting and relevant topic. Nowadays, it prevails to use biomass and urban waste to produce bio-syngas through gasification process as explain in appendix n°5.  and  are the two main components of bio-syngas far beyond  but these gases have inherently low heating value compared with the traditional  [Wal – 2001]. In that respect, the use of catalytic reactions is a feasible solution to enhance the efficiency of such gases and make them competitive with respect to traditional fuels and combustible gases.

      In this research project, the combustion characteristics, the flame behaviour as well as the contribution of the catalytic reaction within a micro-combustor embedding a platinum plate as a catalyst in the middle need to be experimentally and numerically studied. The platinum plate allows both heterogeneous and homogeneous combustion reactions and therefore the employment of syngas and bio-syngas for producing thermal energy for TPVs [Kai – 2012] [Sui – 2017]. It also has a hole in order to allow radical exchanges between both channels and then the flame stabilisation. Experimentally, the deployment of a  mixture within the micro-combustor is done varying the composition as well as the flow rate to study the combustion process using a direct optical method.

      The cylindrical micro-combustor for cylindrical thermophotovoltaic power generation devices was already studied extensively in previous years [Yan – 2002] [Yan – 2010] [Li – 2005] [Li – 2008] [Li – 2013]. This cylindrical design shows to be very limited in terms of modulization and the manufacturing as well as the assembly of the surrounding IR filter and PV cells face some difficulties [Yan – 2010]. In that respect, it is relevant to look after a more convenient design to decrease manufacturing costs and increase efficiency by enhancing modulization.

      To solve the issues and difficulties encountered with a cylindrical micro-combustor, a rectangular design embedding a platinum plate as a catalyst in the middle was imagined and engineered by the “ZAP Lab” combustion laboratory of Tainan, Taiwan.

      • From a pure scientific point of view, this new model of micro-combustor allows to study the efficiency of the rectangular design in comparison with the cylindrical one. As the rectangular design is easier to manufacture than the cylindrical one [Yan – 2010], it allows firstly to reduce manufacturing costs and thus operation costs. Then, it was also shown that rectangle micro-combustor has a much higher radiation efficiency than the micro-cylindrical combustor [Lee – 2003] [Yan – 2010]. This model of micro-combustor would allow to study the combustion reaction and its characteristics as well as the participation of the heterogeneous reactions and the influence of the radical exchanges through the hole on the central platinum plate.

       

      • From a technical point of view, this micro-combustor is intended to be used in series as showed in the figure n°4 to produce enough energy to power a complex mechanical system. This configuration consists in a series of rectangular micro-combustors, planar emitters, filters and PV cells and allows a maximum efficiency as each micro-combustor contributes to the heating of their neighbours, which considerably decreases the risk of flame instabilities as well as thermal quenching by slashing heat losses. The addition of the catalytic combustion as well as a heat recirculation system could also contribute to the enhancement of the micro-combustor performance by limiting the issues previously quoted. A simplified scheme of a rectangular micro-combustor is shown on the figure n°3. This design simplifies greatly the fabrication and assembly process of the whole TPV device while enhancing its efficiency and its flexibility as the adjustment to power requirements only necessitate the addition or the removal of some micro-TPV units.

      研究成果:

    • 馮椲程

      Email:stallinep@gmail.com

      畢業日期:2020/7/31

      研究領域:

      奈米金屬燃燒基礎研究

      • 奈米金屬燃燒特性分析
      • 雷射診測技術

      研究成果:

      【2019】參加國際會議: 12th Asia-Pacific Conference on Combustion, 地點: 福岡,日本

      Flame Structure of Metal Particle in Methane-Air Combustion 【口頭報告】

      Metal particle is one of the most promising alternative material to fossil fuel for future fuels since some particles have high energy densities and it is possible to recycle the particle. Fossil fuels are convenient but it produces carbon emission and causes the increase of greenhouse gas emission in atmosphere. Recently, there has been growing interest in exploring the potential of metal powders utilization in heat and power generation system due to recyclability and zero carbon emission. Compare to fossil fuel combustion, the product of metal particle combustion is solid, and it is possible to capture the product and reform back to original metal by using electrolysis process powered by renewable energy. Alternatively, it is regarded as one of energy storage fashions. In this research, the air and methane premixed mixture entered the co-axial burner and seeded with micron-sized atomized iron particle (diameter= 2–10 ). Metal particle seeded to the system using syringe with a vibration motor attached on its syringe tube. The equivalent ratio for methane and air was 1 (stoichiometric) and variation of metal particle concentration was being conducted. The objectives of this research are to analyze the physical and chemical properties of metal–particle–doped premixed methane-air for future clean and recyclable energy.

    • 吳建勳

      Email:eric05315@hotmail.com.tw

      畢業日期:2017/07/31

      研究領域:

      • 氣化合成氣燃燒現象探討
      • 純氧燃料燃燒技術
      • 化學動力學模擬

      研究成果:

      • 探討混合燃氣之拉伸極限影響火焰結構特性在空氣及純氧條件下利用實驗及模擬觀察其火焰特性。
      • 而藉由CHEMKIN Pro進行數值計算搭配GRI-mech3.0反應機構進行模擬分析。隨著氫氣混摻比例的增加,在空氣及純氧條件下,雖然絕熱火焰溫度增加幅度不明顯,但層流火焰速度卻有明顯的增加
      • 在空氣條件下,隨著氫氣混摻比例從0%增加至20%並在近拉伸極限下,發現除了整體主要物種濃度上升之外,自由基H及OH濃度明顯提升,但氫氣混摻濃度提升至20%時,自由基H及OH卻無明顯提高;而在純氧條件並在拉伸極限下,整體主要物種濃度隨著氫氣混摻比例提高,自由基H濃度也明顯隨著氫氣混摻比例提高而增加。
      • 氫氣混摻比例提高至10%且在近拉伸極限下(8450 s-1),火焰預熱區的主導反應則由R99變化為R46,而在火焰反應區的主導化學反應則由R38及R84因此拉伸極限的增加,是由化學物種與自由基的濃度變化,以及化學反應變化的轉變所造成的結果;接著氫氣混摻至20%在近拉伸極限條件下,R99反而被抑制,R3明顯提升,整體火焰反應區已是由R84所主導反應,由於在自由基濃度上並無明顯變化,此時的氫氣混摻比例以致擴展拉伸極限,是由化學反應變化所致。

    • 洪靖茹

      Email:dodo12081208@yahoo.com.tw

      畢業日期:2016/07/31

      研究領域:

      微型熱光電系統

      • 觸媒燃燒
      • 熱光電系統
      • 微動力系統

       

      研究成果:

      【2016】獲第26屆燃燒與能源學術研討會 學生論文競賽 第二名

      • 相較於傳統式燃燒器(主要利用背向式階梯穩駐機制將火焰穩駐於內部),本研究所設計的微孔式燃燒器,係在白金微管上貫穿數個微孔及搭配背向式階梯的穩焰機制,能使火焰有效地穩駐於微管道中,而石英管具有高透明性,能整合燃燒器內部所幅射出的火焰螢光及白金管受熱後所產生的幅射光,一同導入於熱光電板轉換成電能輸出。
      • 由於內外側皆置入氫氣/空氣時,其操作區間過小,因此將外部燃料改為甲烷並觀察其燃燒現象,經由實驗結果及數值模擬結果可發現:
        1. 內側置入之氫氣需提供足夠之熱才能誘發外部甲烷產生氣相反應。
        2. 在相同當量比及速度下,比較無孔式與微孔式燃燒器之差別,發現微孔式燃燒器內側的氫氣可經由微孔擴散至外側,且內側腔體中氫氣化學反應所產生的熱能除了從微管壁面熱傳至外側腔體外,亦可藉由氣流對流的方式通過微孔傳遞至外側腔體中,促使甲烷誘發氣相反應。
      • 本研究自行研發石英管披覆氧化鐵之輻射器其結果與預期有落差,其因燃燒器反應產生之光部分會被氧化鐵吸收導致其輻射之光通量低於石英管輻射器。
      • 內外皆使用氫氣作為燃料時其整體效率為0.04%,且此條件為其可操作區間之極限,因此將外側燃料改為甲烷,使其操作區間能擴增且整體效率能增加至0.22%。

    • 沈明學

      Email:uniecoaass@gmail.com

      畢業日期:

      研究領域:

      • 深太空探索之電漿推進系統
      • 電漿科學與技術
      • 微推進系統
      • 中高層大氣與電離層擾動

      研究成果:

          I have developed and designed a prototype electric propulsion system applied for miniature satellite especially CubeSat. Electron Cyclotron Resonance Ion Thruster (ECR Ion Thruster), providing a high-density plasma jet, is the promising candidate for the electric propulsion of miniature satellite. By using simulation software, the configuration of an ion thruster is under testing. This prototype system generates nearly 0.9 mN thrust and around 1025~3076 sec specific impulse.

          I also participate in the project of plasma diagnostics for turbulence-flame especially using MZI system. We would like to use MZI system to analyze a three-dimensional flame using tomography method. However, I'm currently a full-time research assistant in the Department of Earth Sciences. I'm doing the research about "ionospheric shock waves triggered by rockets launching and reentry process of spacecraft interact with upper atmosphere and ionosphere."

      ● Micro ECR Ion Thruster (TITAN10)

       

      ● CTID triggered by the launch of a SpaceX Falcon 9 Rocket
      (Charles C. H. Lin and M. H. Shen et al., Department of Earth Sciences)


      ↑ Shock Acoustic Wave (top row) and Concentric Travelling Ionospheric Disturbances.

       

      Lin, C. C. H.M.-H. ShenM.-Y. ChouC.-H. ChenJ. YueP.-C. Chen, and M. Matsumura (2017), Concentric traveling ionospheric disturbances triggered by the launch of a SpaceX Falcon 9 rocketGeophys. Res. Lett.44, doi:10.1002/2017GL074192.

       

    • 陳翔和

      Email:c.sss26@gmail.com

      畢業日期:2016/12/1

      研究領域:

      生質能源應用

      • 生質能源技術
      • 生質燃料前處理技術: 焙燒
      • 氣化合成氣燃燒
      • 經濟分析

      研究成果:

      • 氣化溫度對產氣中氫氣/一氧化碳的濃度比有明顯的影響,在680℃到780℃此溫度區間內,這個值可以相差至約50%。而其他因素的影響則相對較小,影響大小的排序為: 氣化溫度>氮氣流率>焙燒溫度>水氣流率。
      • 導致產氣成分比例依溫度不同的原因為化學平衡的不同。在溫度較低時,在氣化開始後以氣相反應為主。若為高溫氣化,異相反應的正反應趨勢則明顯強於氣相反應。
      • 氣化過程主要分為揮發分反應和焦炭反應兩部分。揮發分以生質物裂解所產生的甲烷為主,在甲烷逐漸消耗後,反應較慢的固態碳成為氣化反應的主要原料。揮發分反應可以產生高比例的氫氣,不過反應時間很短,大多數時間為焦炭反應。

    • 陳峙廷

      Email:m81i10k13e@yahoo.com.tw

      畢業日期:2017/07/31

      研究領域:

      • 電漿量測技術
      • 燃燒與熱傳
      • 微推進系統

      研究成果:

      【2017】 阿卜杜拉國王科技大學(KAUST)旅遊獎學金,補助參加國際會議: KAUST Research Conference: New Combustion Concepts, 地點: 圖沃,沙烏地阿拉伯

      • 利用Langmuir probe 量測電漿於火焰中的結構

    • 蕭楷潾

      Email:littlepig602@gmail.com

      畢業日期:2018/08/31

      研究領域:

      生質能源及其應用

      • 生質能源
      • 生質炭混燒技術
      • 流體化床燃燒技術
      • 生命週期分析

      ​Miniature Coal-fired Combustor 【Video】

      研究成果:

      【2016】 參加國際會議: 2nd Energy Engineering Alliance Forum地點: 胡志明市,越南

      Combustion Behaviors of Fuel Pellets from the Mixture of Coal and Miscanthus Biochar 口頭報告

      This study investigates the impact of biochar cofiring on the combustion characteristics of fuel in coal-fired burners. The study also involves pyrolysis experiments to determine the optimal conditions of producing Miscanthus biochar. The combustion behaviour of fuel pellets made from a mixture of pulverized Australian coal and miscanthus biochar was investigated through a series of experiments including thermogravimetric analysis (TGA) and pellet combustion in a single pellet burning furnace. Results from the pyrolysis experiments showed that biochar produced at 300°C has thermochemical properties almost similar to those of Australian coal. Fuel pellets produced at a blending ratio of 50% Miscanthus biochar and 50% coal demonstrated to have improved combustion characteristics.

      Primary thermal degradation - 200℃~ 400 ℃ & 400℃~ 650℃.

      【2017】 參加國際會議: 12th Int'l Symposium on Advanced Science and Technology in Experimental Mechanics, 地點: 金澤,日本

      Optimizing the Operating Parameters of Torrefaction Process on the Combustion Enhancement of Coal/Biochar Blended Fuels 【口頭報告】

      Although the biomass is regarded as a suitable alternative fuel, its fuel properity and combustion characteristics are much different from fossil fuel. Fossil fuel contains high energy density and low procurement cost.The biomass is harmful to combusiton due to its high moisture content, hygroscopic behavior, low energy density and low grindability. In order to cope with these problems, torrefaction was used to improve these disadvantages. However, operating parameters of torrefaction process are associated with the fuel property of biochar and coal/biochar co-combustion. Therefore, the Taguchi method was utilized to reduce the experimental runs and search for the optimum condition of torrefaction process. The produced biochar would blend with pulverized coal at 50% on gravimetric basis. Comparing the combustion behavior among the pulverized coal, biochar, and blended fuels, a thermogravimetric analyzer was used to observe weight loss of fuel from ambient temperature to high temperatures at fixed heating rate. Then, intersection method and fuel conversion were used to find the ignition temperature and burnout temperature. The results showed the ignition temperature and burnout temperature of blended fuel would occur earlier than pulverized coal. In addition, the fuels were compressed as pellets and carried out combustion experiment in a practical system. The blended fuel has longer volatile combustiondue to more volatile matter contained, while pulverized coal contained more fixed carbon results in persisting longer time during char combustion. The results showed that the coal/biochar blended fuel can effectively enhance the fuel conversion rate and combustion characteristic index. Furthermore, the results can be applied to co-firing in large scale boilers in the future.

      Combustion process of three solid fuels at a surrounding temperature of 600 °C.

    • 潘均祐

      Email:S124567213@yahoo.com.tw

      畢業日期:2019/01/31

      研究領域:

       電力式推進系統

      • 陰極電弧推進系統
      • 電漿量測系統 

      Vacuum Cathod Arc Thruster【Video】

      研究成果:

      【2017】 參加國際會議: 2nd Southeast Asia Workshop on Aerospace Engineering, 地點: 胡志明市,越南

      The Development and Design of Vacuum Cathode Arc Thruster 【口頭報告】

      The electric propulsion (EP) produces thrust by exhausting the plasma with high speed. In general, the propellant of EP is initially consumed and ionized via electric power system and it provides the plasma flow. Compared with the conventional chemical propulsion, the EP has high specific impulse, and it means high fuel conversion rate on propellant. This research focuses on the development of vacuum cathode arc (VCA) thruster. Characteristically, it does not need any extra feeding system of propellant because it uses the cathode electrode as propellant simultaneously. For the ignition, tiny spots coated on the surface of cathode are aimed to induce the plasma flow with advantages of size and weight reduction, which is suitable to apply in the microsatellites. In addition, a ‘trigger less’ method with inductor storage power system was used for generating pulsed plasma. This discharge method can significantly reduce input power. Thrust is mainly caused by high-speed exhaust velocities of metal ions in the plasma flow, namely, the ion density, ion velocity, and ion charge are important parameters.

      Illustration of the process of vacuum arc generation on the cathode surface.

      【2018】 參加國際會議: 3rd South East Asia Workshio in Aerospace Engineering, 地點: 曼谷,泰國

      The Development, Design and Demonstration of Vacuum Cathod Arc Thruster【口頭報告】

      The electric propulsion (EP) produces thrust by exhausting the plasma with high speed. In general, the propellant of EP is initially consumed and ionized via electric power system and it provides the plasma flow. Compared with the conventional chemical propulsion, the EP has high specific impulse, and it means high fuel conversion rate on propellant. This research focuses on the development of vacuum cathode arc thruster (VAT). Characteristically, it does not need any extra feeding system of propellant because it uses the cathode electrode as propellant simultaneously. For the ignition, tiny spots coated on the surface of cathode are aimed to induce the plasma flow with advantages of size and weight reduction, which is suitable to apply in the microsatellites. In addition, a ‘triggerless’ method with inductor storage power system was used for generating pulsed plasma. This discharging method can significantly reduce input power. Thrust is mainly caused by high-speed exhaust velocities of metal ions in the plasma flow, namely, the ion density, ion velocity, and ion charge. Those parameters are important. Instead of conventional power supplies, a battery was used to replace the power supply system for reducing the overall weight of VAT energy processing unit, in the meantime to estimate the energy required for a single pulse by measuring the change of discharge current and voltage.

      Discharge diagram of vacuum cathod arc thruster.

    • 孫宜平

      Email:Palagiri705@gmail.com

      畢業日期:2018/02/28

      研究領域:

      微型電力式推進系統

      • 脈衝式電漿推進器
      • 電漿量測

      研究成果:

      Two types of thruster prototypes are developed. One is a solid-fed pulse plasma thruster and the other is a gas-initiated pulsed plasma thruster. Solid-fed pulsed plasma was tested in high vacuum condition and the results showed that the impylse bit increases with the increasing energy and the maximum impulse bit seen was 257.98 μN-secat 25 J of energy. Gas-initiated pulsed plasma was also tested and discharged succeddfully but the maximum impulse bit seen was 1.54 μN-secat 76.5 J of energy because the discharge loop was very large.

                   Solid-fed PPT         Gas-initiated PPT     Modified solid fed

                            

      【2017】 參加國際會議: 2nd Southeast Asia Workshop on Aerospace Engineering, 地點: 胡志明市,越南

      Designing of Gas-Initiated Pulsed Plasma Thruster 【口頭報告】

      Pulsed Plasma Thruster is one of the most promising, simplest and was first form of electric propulsion device to be flown on board a real spacecraft zond2 in 1964. Since 1964 there has been a lot of research done on electrode configuration, propellant and initiator behaviour, which shows that the erosion of initiator leads to reduce the lifetime of thruster. The paper aims to present an approach to design a gas initiated pulsed plasma thruster (G-PPT) in which gas acts as both initiator as well as propellant which eliminates erosion issue. A rectangular breech fed G-PPT Prototype has been designed with argon as propellant and tested in vacuum condition at pressure 10^-4 torr with variable flow rates while the gap between the electrodes is maintained as 1mm and 3mm. The discharge was successful in all the conditions and the peak current reached at 1mm is 1.6KA and at 3mm it is 3 KA.

      Discharging of gas-initiated PPT at 1mm gap in vacuum.

    • 彭冠勛

      Email:padddy85218@gmail.com

      畢業日期:2020/7/31

      研究領域:

      微型燃燒系統

      • 微動力系統設計
      • 微燃燒基礎火焰分析
      • 計算流體力學模擬

      研究成果:

      【2019】 參加國際會議: 36th European Photovoltaic Solar energy Conference and Exhibition, 地點: 馬賽,法國

      A Thermophotovoltaic Micro-Combustor Using Selective Emitters【口頭報告】

      The ideal spectral shape of a TPV emitter requires a high emission with a moderate bandwidth at an energy that is slightly above the semiconductor diode bandgap. Long wavelength suppression is also essential to prevent the energy losses due to the transparency of the diode for photons with energy smaller than the semiconductor bandgap. The properly tailored spectral emission enhances the overall efficiency of a typical TPV system. While in recent years there have been many remarkable efforts in far-field TPV using various photonic nanostructures, here we used a simple planar emitter structure using indium tin oxide (ITO) on sapphire, which can achieve the desired emission characteristic as an ideal TPV emitter. In addition, we demonstrate a stainless-steal/quartz micro-combustor that can be used in conjunction with ITO/Sapphire selective emitter. The mixture of 1:1 CH4/H2 fuel in the micro-combustor leads to stable combustion. Additionally, when the exit temperature is >1000 K with bright white color anchored in the channel observed, we can infer that both hetero- and homogeneous reactions occur in the reactor. It is noted that catalytically induced flame can be anchored inside the micro channel, and flame luminosities in the micro reactor are apparently bright in equivalence ratio of 1.0 and 0.8.

    • 多翰嘉

      Email:dorn.killian@orange.fr

      畢業日期:2020/7/31

      研究領域:

      微型電力式推進系統

      • 脈衝式電漿推進器
      • 電漿量測

      碩士論文題目: 電極板夾角對脈衝電漿推進器性能之影響與優化

      本論文致力於發展具有不同的電極擴張角度,以及非對稱角度之微型脈衝式電漿推進器(簡稱PPT),選擇四個不同的電極夾角和非對稱配置設置,以檢測其電極結構參數對於推進器性能和可靠性之影響。PPT的原型機設計先前已經完成,本研究主要通過可拆卸和可更換的部件對推進器的推力性能進行改進。通過高速相機的使用已經觀察到並解釋未解決的電漿放電現象,並且提出假設模型。此外,採用田口方法來檢查設計參數對推進器性能和可靠性的影響。

      研究成果:

    • 劉邁丹

      Email:maxime.lenormand@ipsa.fr

      畢業日期:2019/7/31

      研究領域:

      微型電力式推進系統

      • 脈衝式電漿推進器
      • 電漿量測

      研究成果:

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