• Title/Summary/Keyword: KS 표준

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Prediction of Explosion Risk for Natural Gas Facilities using Computational Fluid Dynamics (CFD) (전산유체역학시뮬레이션을 이용한 도시가스 설비의 폭발위험성 예측)

  • Han, Sangil;Lee, Dongwook;Hwang, Kyu-Suk
    • Journal of the Korean Applied Science and Technology
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    • v.35 no.3
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    • pp.606-611
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    • 2018
  • City natural gas is classified flammable hazardous gas and should be secured according to explosion risk assessment determined by Industrial Standard KS C IEC. In this study, leak size, ventilation grade and effectiveness were adopted to the KS C IEC for risk assessment in natural gas supply system. To evaluate the applicability of the computational fluid dynamics (CFD), the risk assessment was studied for four different conditions using hypothetical volume($V_z$) valuesfrom gas leak experiments, KS C IEC calculation, and CFD simulation.

Developing a Test Tool for Electronic Book Standard Conformance (전자책 표준 적합성 도구의 개발)

  • 김재경;손원성;임순범;김성혁;최윤철
    • The Journal of Society for e-Business Studies
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    • v.9 no.1
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    • pp.269-284
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    • 2004
  • EBKS(Electronic Book of Korea Standard) 1.0 which was established in July 2001 passed the industry standard deliberation of agency for technology and standards of Korea industry in July 2002. EBKS is now established as KS X6100 representing the Korea standard of electronic book of Korea. Therefore, Conformance test and certification procedure is required whether electronic books and documents which follow KS X 6100 are conform to specification of the standard. In the paper, we define conformance clause which is a basis for conformance test and standard electronic book schema. As a result, electronic book writers can produce more conformable documents to the specification and goal of electronic book standard by using the conformance clause, and service provider can effectively perform the conformance test by using standard electronic book schema.

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The study of method and verification that Surge protective devices connected to low-voltage power systems of the thermal stability test (전원용서지보호장치(Surge protective devices connected to low-voltage power systems)의 열안전성시험(Thermal stability test)의 방법 및 판단에 대한 고찰)

  • Choi, Gil;Park, Shin-Woo;Lim, Byung-Bae
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.1213-1214
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    • 2015
  • 서지보호장치(Surge Protective Device)가 국내에 본격적으로 설치된 것은 산업화의 발전으로 인해 현장 전력시스템의 복잡성과 다양성 및 급격히 변화하고 있는 우리나의 기후변화 때문일 것이다. 전원계통의 전원용서지보호장치(Poser Systems Surge Protective Devices) 및 통신계통의 통신용서지보호장치(Telecommunication Surge Protective Devices)의 설치는 해마다 증가하고 있다. 이에 따른 제품개발도 급속도로 이루어지고 있으며, 과거 몇년 전만해도 서지보호장치에 대한 표준과 시험설비의 이해와 부족으로 인해 표준에 의한 제품검증이 어려웠으나 2013년 제정된 KS 표준(KS C IEC 61643-11)으로 상당수 제조자가 관련인증을 취득하고 있다. 이 논문에서는 KS표준에서 정의하고 있는 열안전성시험에 대한 방법과 결과판정 및 새로운 기준을 제시하고자 한다.

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