• Title/Summary/Keyword: 리셉터클

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The Basic Position Tracking Technology of Power Connector Receptacle based on the Image Recognition (영상인식 기반 파워 컨넥터 리셉터클의 위치 확인을 위한 기초 연구)

  • Ko, Yun-Seok
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.2
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    • pp.309-314
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    • 2017
  • Recently, the fields such as the service robot, the autonomous driving electric car, and the torpedo ladle cars operated autonomously to enhance the efficiency of management of the steel mill are receiving great attention. But development of automatic power supply that doesn't need human intervention be a problem. In this paper, a position tracking technology of power connector receptacle based on the computer vision is studied which can recognize and identify the position of the power connector receptacle, and finally its possibility is verified using OpenCV program.

A Study on the Durability Performance of a Receptacle for CNG Vehicles (천연가스 차량용 리셉터클의 내구성능에 관한 연구)

  • Choi, Young;Kim, Young-Min;Lee, Yong-Gyu;Lee, Jang-Hee
    • Journal of the Korean Institute of Gas
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    • v.14 no.6
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    • pp.15-20
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    • 2010
  • Compressed Natural Gas (CNG) buses have been supplied since the year 2000 in order to resolve severe atmospheric pollution in metropolitan area and contributed on the improvement of urban atmospheric environment. However, it is indispensible to take an adequate measure to guarantee the safety of CNG vehicles because of the possibility of huge fire accident. A receptacle, connecting device between high pressure fuel supply tank and fuel line, plays an important role in CNG supply system. In recent, leakage of CNG from receptacles has been reported. So, the concern about the security and reliability of receptacles has been arisen. Therefore, a lot of efforts to prevent leakage are invested among researchers and the durability of this component should be guaranteed despite repeated operation. This research has performed durability tests of a CNG receptacle regarding the repeated usage, extreme chattering, and continuous full flow test. Although a receptacle used for CNG vehicle satisfies validation requirements in the test results, it has been found that failure in the function of leakage prevention in a receptacle could take place in the case of prolonged exposure to high supply pressure in common quick charging environment on site.

Analysis of Flow Performance According to Actuator Geometry of Receptacle for Hydrogen Charging System with Filter Applied (필터가 장착된 수소충전시스템용 리셉터클의 작동부 형상에 따른 유동 성능 분석)

  • JU HWAN CHOI; GU HO KIM;JAE KWANG KIM;YONG KI KIM;HYUN KYU SUH
    • Transactions of the Korean hydrogen and new energy society
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    • v.34 no.1
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    • pp.17-25
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    • 2023
  • The purpose of this study was to propose a design that shows optimal performance by changing the geometry of the internal flow path of the receptacle in order to prevent the decrease in flow rate and differential pressure performance due to the application of the receptacle in the hydrogen charging system. To achieve this, 3D computational fluid dynamics simulation was performed for the receptacle, according to the geometry of the flow path inside the receptacle. The pressure results at the inlet and outlet were measured the same as both of N and H2 in the experiment, and the flow rate of H2 was 3.75 times higher than that of N2. In addition, since the flow performance of the receptacle improved under conditions where the flow path was widened, it was confirmed that reducing the diameter of the poppet and the width of the guide are advantageous for improving performance.

A Numerical Analysis of Pressure Distribution and Pressure Drop in Receptacle for Hydrogen Charging System (수소 충전 시스템용 리셉터클의 내부 압력 분포와 압력 강하에 관한 수치적 연구)

  • YUANGANG WANG;SEUNGHYEOK LEE;CHAE HOON SOHN;SEDONG LEE;HYUNBOK LEE
    • Transactions of the Korean hydrogen and new energy society
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    • v.34 no.5
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    • pp.497-504
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    • 2023
  • This study analyzes pressure distribution and pressure drop in the receptacle used in charging system of hydrogen fuel cell vehicles. The objective is to minimize receptacle-induced pressure drop by redesigning internal flow channels. Through numerical simulations, three receptacle variants are compared with a baseline case. Results show reduced pressure drop in the filter section. However, the check valve section exhibits higher pressure drop, requiring further improvement. By increasing throat diameter, pressure drop is decreased by 28% between inlet and outlet of the receptacle. This study shows the relationship between dynamic pressure and pressure drop, providing a guideline for receptacle performance optimization. The redesigned receptacle offers potential for enhancing hydrogen charging efficiency.

Pressure Drop Analysis on Filling of Hydrogen Fuel Cell Vehicles (수소연료전지 차량 충전에서의 압력강하 분석)

  • Hyo Min Seo;Byung Heung Park
    • Journal of the Korean Institute of Gas
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    • v.27 no.1
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    • pp.38-47
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    • 2023
  • In the hydrogen filling process, hydrogen flows by the pressure difference between the supply pressure at a filling station and a storage tank in the vehicle, and the flow rate depends on the pressure difference. Therefore, it is essential to consider the pressure drop of hydrogen occurring during the filling process, and the efficiency of the hydrogen filling process can be improved through its analysis. In this study, the pressure drop was analyzed for a hose, a nozzle/receptacle coupling, a pipe, and a valve in a filling line. The pressure drops through hose and pipe, the nozzle,receptacle coupling, and the valve were calculated by using a equation for a straight conduit, a flow nozzle formula, and a gas flow respectively. In addition, as a result of comprehensive analysis of the pressure drop effect occurring in each component, it was found that the factor that has the greatest influence on the pressure drop in the entire filling line is the pressure drop through the valve. This study can be used to develop a model of the hydrogen filling process by analyzing hydrogen flow including hydrogen filling in the future.

4-Nonylphenol Increased NO Synthesis via a Non-genomic Action in GH3 Cells (뇌하수체 세포인 GH3세포에서 non-genomic action을 통한 Nonylphenol의 nitric oxide 증진효과)

  • Lee Kyung-Jin;Choi Chul-Yung;Sohn Hyun-Jung;Jeong Back-Jin;Moon So-Hee;Lee Hwanghee;Lee Jong-Bin
    • Environmental Analysis Health and Toxicology
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    • v.18 no.4
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    • pp.249-254
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    • 2003
  • 본 연구는 환경호르몬(endocrine disruptors)으로 분류되었으며, 에스트로젠 화합물의 특성을 지닌 4-Nonylphenol (NP)이 설치류 Pituitary 세포 중 성장호르몬을 분비하는 GH3 세포의 Nitric oxide(NO)을 증가시키는 작용기전을 규명코자 수행되었다 먼저 GH3세포에 NP처리 농도에 따른 NO의 생성을 측정한 결과 NP처리농도 의존적으로 증가시켰다. 이러한 NO의 증가가 genomic action인지를 확인하기 위해 GH3세포의 NO를 증가시키는 효소인 neuronal oxide synthase의 단백질량을 측정한 결과 GH3세포에서 NP에 의한 nNOS의 단백질의 변화는 없었다. 에스트로젠 화합물인 NP가 에스트로젠 리셉터 (ER)와의 관계를 조사하기 위해 ER억제제(ICI 168,780)클 처리한 경우 NP에 의해 증가한 NO가 감소하였다. 또한 유전자 전사억제제인 actinomycin D 및 단백질 발현 억제제인 cycloheximide을 처리한 경우는 NP에 의한 NO 증가억제효과가 없었다. 이러한 결과를 종합해 볼 때 GH3 세포에서 NP는 ER을 매개한 non-genomic action에 의해 NO를 증가키는 것으로 사료된다.