• Title/Summary/Keyword: Transportation device

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Analysis of Transportation and Handling system for Advanced spent fuel management process (사용후핵연료 차세대관리공정 운반취급계통 분석)

  • 홍동희;윤지섭;정재후;김영환;박병석;박기용;진재현
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1438-1441
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    • 2003
  • The project for "Development of Advanced Spent Fuel Management Technology" has a plan of a demonstration for the Advanced Management Process in the hot cell of IMEF. The Advanced Management Process are being developed for efficient and safe management of spent fuels. For the demonstration, several devices which are used to safely transport and handle nuclear materials without scattering have been derived by analyzing the Advanced Management Process, object nuclear material and modules of process equipment and performing graphical simulation of transportation/handling by computers. For verification, powder transportation vessel and handling device have been designed and manufactured. And several tests such as transporting, grappling, rotating the vessel have been performed. Also, the design requirements of transportation/handling equipment have been analyzed based on test results and process studies. The developed design requirements in this research will be used as the design data for the Advanced Management Process.

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The study for improving a fruit of the railway R&D (철도연구개발 성과 향상방안 연구 -연구개발추진체계 중심으로-)

  • Park, Man-Soo;Lee, Hi-Sung;Moon, Dae-Seop
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1324-1332
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    • 2008
  • The change of the transportation circumstance related to the deep environmental pollution, escalation of the energy price, increasing social cost of the congestion and traffic accident, improving a income level, advanced social structure etc, is rapidly proceeded. For the corresponding this transportation circumstance, the role of the railway is being increased and that is friendly with environment, efficient for the energy, observed the time schedule and the transportation device which is high speed and safe mass transportation. In addition, government's R&D investment is being increased according to deeping a strength of the international competitiveness through the technical innovation. So railway's R&D investment is being increased. Accordingly, This study suggest improving a fruit of the R&D related to railway R&D system for a efficient R&D investment.

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A Technology for New Bi-Directional Converter for Battery Electric Power Storage Device (배터리 전력저장장치를 위한 새로운 양방향 컨버터에 대한 기술)

  • Park, Hae Chan;Oh, Sun Ho;Kim, Jae Woong;Kim, Il Song
    • Proceedings of the KIPE Conference
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    • 2015.07a
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    • pp.29-30
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    • 2015
  • 본 연구는 배터리 전력저장장치를 위한 새로운 양방향 컨버터에 대한 기술이다. 제안된 기술은 절연형 토플로지로 10배 이상의 높은 승/강압비, soft-switching 기능으로 대용량/저전압 배터리를 구성할 수 있다. 기존에 사용되던 DAB(Dual Active Bridge)의 단점은 배터리 충/방전 전류가 정전류(Constant Current)가 아닌 +/-가 반복되는 양방향의 불연속적인 파형이라는 것이다. 이것은 배터리 충/방전 제어명령이 정전류 형태의 상수 값이라는 것을 고려하면 그대로 사용하기에는 문제가 될 수 있다. 그러므로 Current-source type의 변형된 DAB 토플로지를 사용하여 전류원 형태의 정전류 제어가 가능하다는 것이 장점이 된다. 제안된 기술의 검증을 위해 컴퓨터 시뮬레이션과 실험을 통하여 그 성능을 입증하였다.

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Effect of Emission gas from Air craft to Ambient Air (항공기 배출가스가 대기환경에 미치는 영향)

  • 신찬기
    • Journal of environmental and Sanitary engineering
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    • v.10 no.3
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    • pp.124-130
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    • 1995
  • Air pollution problem by air craft was reviewed from emission gas components from air craft and pollutants amount generated in airport with the compareness of domestic transportation data by airplane and foreign data. It is reported that concentration of emission gas from air craft is lower than that of pollutants from automobile and factory. But transportation frequency is increasing rapidly in Korea. It is recommended that concerns should be taken on long- term of counterplan device about it.

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Response Characteristic Analysis using Modeling of Propulsion System for 8200 Electric Locomotive (8200호대 전기기관차 추진시스템 모델링을 이용한 응답특성분석)

  • Jung, No-Geon;Chang, Chin-Young;Yun, Cha-Jung;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.11
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    • pp.1640-1646
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    • 2013
  • Conventional power conversion unit that is a major part of the propulsion system has applied GTO thyristor as a switching semiconductor device of main circuit since introduction of the 8200 electric locomotive. But problem that quick maintenance is difficult and its cost is increasing occurs because major components of the power conversion unit are slowly discontinued. To solve these, in this paper, it was analyzed the response characteristic of the propulsion system modeling of the 8200 electric locomotive using IGBT which is applied recently to ensure propulsion control technology. As results of response for a Propulsion system modeling, it show that a power conversion unit is controlled by PLL(Phase-locked loop) and SVPWM(Space Voltage PWM) respectively.

A Study on RF Communication Stabilization of Security System for Oil Tank-Lorry Truck Based on IoT (IoT 기반의 유류 수송 차량 보안 시스템을 위한 RF 통신 안정화 개선 연구)

  • Kim, Min-Sung;Kim, Hie-Sik;Kim, Hae-Kyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.6
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    • pp.916-922
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    • 2017
  • Security systems for inland cargo truck transportation are mostly limited to route tracking for safe and efficient transportation. With this route tracking system, the status of cargo trucks can be monitored easily within inland boundaries. In case of oil transportation by land, however, security systems ensuring transportation of a designated quantity of products have been subject to extensive research since thefts and substitution by a similar product in the transportation process have emerged as a social problem. Security devices installed in an oil tank truck must meet the explosion-proof performance standards and be applicable to varying types of trucks. Accordingly, a wireless electronic seal with RF communication functions is considered to be the most appropriate method, but e-seals on moving vehicles require such levels of performance and reliability that can overcome certain challenges including changing radio waves and topographical impediments. Considering these characteristics of oil tank trucks, this study proposes an stabilization method to enhance the RF communication performance of e-seals, based on radio simulation and experiment findings.

Converter Control for APU of 8200 Series Electric Locomotive using Advanced Single Phase PLL Control Method (진보된 단상 PLL 제어방법을 이용한 8200호대 전기기관차 보조전원장치용 컨버터 제어)

  • Jung, No-Geon;Lee, Eul-Jae;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.1
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    • pp.211-215
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    • 2017
  • The APF (All Pass Filter) method that utilizes the computational power of the controller is most commonly used. However, since the calculation of the filter coefficient is complicated, the calculation is carried out in advance. It is difficult to apply it to the frequency fluctuation environment because the coefficient value is fixed. In this paper, a new control method of single phase PLL that can be usefully used in PWM converter device for electric railway was explained. Comparison and examination of similarities and differences between the conventional APF method PLL controller method and the newly proposed modified MA filter method PLL technique were performed. The possibility of implementation of the modified MA filter method through computer simulation was analyzed. In conclusion, the method proposed as the conclusion was applied to the APU(Auxiliary Power System) of 8200 Series Electric Locomotive and its usefulness was confirmed.

Comparison of Lane Curing Time using Natural Drying and Line Drying Device when Painting Pavements on Highways (고속도로에서 차선도색시 자연건조 및 열풍기 사용시의 차선 양생시간 비교)

  • Hong, Su-Jeong;Oh, Heung-Un
    • International Journal of Highway Engineering
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    • v.20 no.4
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    • pp.35-46
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    • 2018
  • PURPOSES : The purpose of this study is to compare the lane curing time of natural drying and a lane drying device when painting lines on a highway. METHODS : The painting process was carried out in July 2015 and September 2015, respectively, for the Gimcheon IC - Gimcheon JC. After the painting, measurements were obtained three times at six measurement points located at 20 m intervals on the shoulder line and the dividing line. The curing time was measured for natural drying and drying using a lane drying device, and compared for different pavement types (asphalt, concrete) and paint types (waterborne paint, methyl methacrylate paint). RESULTS : The results of the lane curing time comparison on the highway are as follows. The combination of asphalt and methyl methacrylate paint cured more rapidly during both the natural drying and drying using the lane drying device. Finally, it was cured at least 32.2% and 40.7% faster when using a drying device than in natural drying. CONCLUSIONS : The comparison of lane curing time of the highway showed that the combination of asphalt and methyl methacrylate paint cured more rapidly when using both natural drying and a lane drying device.

Welcome the Challenges and Imaging the Sky Town

  • Cheng, Jiang Huan
    • International Journal of High-Rise Buildings
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    • v.6 no.3
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    • pp.271-277
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    • 2017
  • Safety, livability, and efficiency are the three prominent problems of tall buildings, which are also the severe challenges to designers. We proposed the idea of building the sky town to solve these problems, which can be summarized in two sentences, one is tall building multi-storised, and another one is vertical facilities municipal-infrastructurised. The tall building can be horizontally cut into several multi-storey buildings by some large platforms. The platform extends a certain width to block the fire from spreading. Tall buildings are connected together as a group. One of them is a traffic core, which is used for vertical transportation and MEP. It connects to traffic center such as metro, while most of the other tall buildings' cores can be very much released, so as to achieve maximum efficiency of floor usable area and to give good traffic organization. By combining traffic core, platforms, and multi-storey buildings' inner traffic, a transportation network is formed. Finally, we refer to the design of Raffles City Chongqing to make a sketch of sky town.

Improvement of Overspeed Protection for Automatic Train Stop System (열차자동정지시스템(ATS)의 과속방지장치 개발)

  • Jeong, Rag-Gyo;Kim, Baek-Hyun;Kang, Seok-Won;Seo, Moon-Seog
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.1
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    • pp.61-67
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    • 2018
  • Automatic Train Stop (ATS) is a device that automatically stops or decelerates a train when the train exceeds the permitted speed limits or violates the signal regulations. The railway signaling system has been evolved to an automatic train control system (ATC), and is being developed into Distance-to-Go and Communication Based on Train Control (CBTC). In spite of that, the ATS system is currently being operated in Seoul Metro (line 1 and 2) and most of railway lines in Korea as well as overseas. In this study, we presents the technical methodology to prevent human errors in order to secure the safety in operation of the ATS system.