• 한국수소및신에너지학회논문집
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• 제33권4호
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• pp.383-390
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• 2022

Appropriate explosion proof electrical equipment should be installed in hazardous areas. In areas where hydrogen is handled, explosion proof electrical equipment adjacent to the hydrogen handing facility must be reviewed for selection of gas group IIC (or IIB+H₂) equipment. When selecting explosion proof electrical equipment for the flammable substance handling facility in areas where hydrogen and flammable substance are handled, the method to avoid gas group IIC (or IIB+H₂) equipment has been suggested by using the operating pressure of the hydrogen handling facility. When the operating pressure of the outdoor hydrogen handling facility is 1.065 MPa or less, it has been confirmed that there is no need to install gas group IIC (or IIB+H₂) equipment for the flammable substance handling facility adjacent to the hydrogen handling facility. And the method of selecting explosion proof electrical equipment for the flammable substance handling facility has been suggested as a flowchart, so it will be able to be utilized when selecting appropriate explosion proof electrical equipment.

• 한국안전학회지
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• 제35권2호
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• pp.8-16
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• 2020

In Article 311 of the Regulation on Occupational Safety and Health Standards requires the use of Korean Industrial Standards Act in accordance with the Industrial Standardization Act. However, the classification, inspection, maintenance, design, selection, and installation of explosion hazard locations for explosion and explosion prevention and internalization of 'safety' in the performance maintenance phase of electrical machinery and equipment There is no technical and institutional management plan for remodeling and alteration. Analysis of actual conditions and problems related to the installation, use, and maintenance of explosion-proof equipment, comparative analysis of domestic and international technical standards and systems, technical, institutional and administrative systems and systems related to installation, use, and maintenance of explosion-proof equipment, technical personnel and qualifications, etc. It is to propose legislation, system improvement, and technical standard establishment related to the maintenance of explosion-proof facility performance through improvement of the necessity and feasibility study for establishment of the legal status of the management site and management plan. As technical measures, KS standard revision (draft), KOSHA guide (draft) and explosion-proof facility performance maintenance manual were presented. In addition, the institutional management plan proposed the revised rule on occupational safety and health standards, the revised rule on the restriction of employment of hazardous work, and the manpower training program related to the maintenance of explosion-proof facilities and the qualification plan. Enhance safety at the installation, use, and maintenance stage of explosion-proof structured electrical machinery. It is expected to be used to classify explosion hazards, select related equipment, and to update and standardize standards related to installation, use and maintenance.

• 한국안전학회지
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• 제35권1호
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• pp.1-11
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• 2020

Article 325 (Prevention of Fire Explosion due to Electrostatic) of the Rule for Occupational Safety and Health Standard specifies that in order to prevent the risk of disasters caused by static electricity, fire, explosion and static electricity in the production process, However, in order to do this, it is absolutely necessary to use a pre-detection technology and a detector for antistatic discharge prediction, which is a precautionary measure by static electricity in a fire / explosion hazard place, but in Korea, And there is no technical standard for the application of the technology of the explosion proof structure of the related equipment. Research methods include domestic and overseas electrostatic discharge detection technology and literature investigation of related equipment explosion proofing technology, domestic and foreign electrostatic discharge detection device production and use situation investigation, advanced foreign technology data analysis and benchmarking. In particular, we sought to verify the results of empirical experiments using electrostatic discharge detection technology through sample purchase and analysis of related major products, development of optimization technology through prototype production, evaluation, and supplementation, and expert knowledge through expert consultation. The results of this study were developed and fabricated two prototypes of electrostatic discharge detector based on the technology / standard related to electrostatic discharge detection technology in Korea and abroad through development of electrostatic discharge detection technology and development and production of detector. In addition, based on the development of electrostatic discharge detection technology, we developed an intrinsic safety explosion proof ib class explosion proof technology applicable to the process of using and handling flammable gas and flammable liquid vapor and combustible dust. In the case of the over voltage and minimum voltage are supplied to the explosion-proof structure ESD detector, check the state of the circuit and the transient and transient currents generated by the coil and capacitor elements during the input and standby of the signal pulse voltage. Explosion-proof equipment-Part 11: Intrinsically safe explosion proof structure The comparative evaluation with the reference curve in Annex A of "i" confirms that the characteristics of the intrinsically safe explosion protection structure are met.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2018년도 공동국제학술발표회
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• pp.178-178
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• 2018

• 한국안전학회지
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• 제26권5호
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• pp.33-40
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• 2011

In the hazardous areas where explosive liquids, vapors and gases exist, electrical apparatus/equipment should have explosion-proof construction. The consuming of liquefied natural gas(LNG) has markedly increased in the industrial field, especially in aspect of some thermoprocessing equipment, boiler, dryer, furnace, annealer, kiln, regenerative thermal oxidizer(RTO) and so on. Because it has many merits, clean fuel, safety, no transportation/storage facility and so on. It is strongly recommend that the classification of hazards has to be decided to prevent and protect explosion which may occur in thermoprocessing equipment. In this paper, the operated thermoprocessing equipments in industrial area investigated and explosion risk assessment about LNG leakage from its facilities was performed through numerical calculation and computer simulation. Finally, we suggest the systemic/technical approach for safety assessments of thermoprocessing equipments consumed LNG fuel which are specially subjected to classification of hazardous area.

• 한국가스학회지
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• 제22권1호
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• pp.78-85
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• 2018

본 연구를 통하여 반도체 FPD 제조설비 및 클린룸에 관련한 설비의 위험성분석과 그에 대한 근원적인 안전대책을 연구하고, 설비 및 환경의 특수성을 고려한 방폭 설계 모델링화를 검토하여 관련 설비의 설계 및 제작에 기술적인 기준과 근거로 활용하고자 하며, 아래와 같은 성과로서 향후 반도체 FPD 산업의 기술적 기준 수립 및 관련 산업에 기여할 것으로 생각한다. 1) 관련 국제 기술규격과 법령, 설비의 특성을 반영한 FAB 장비의 최적화된 폭발위험장소의 모델링 도출 2) FAB 장비 및 클린 룸의 특성을 고려한 위험설비의 안전성 확보 (Fool-Proof와 Fail Safe)를 위한 안전시스템 구축방안과 안전기준 및 대책 도출 3) 향후 FAB 장비의 방폭 설계에 대한 가장 효율적인 기준 적용을 통한 신규 FAB 장비의 방폭 성능의 유연성 확보하고 수립된 안전기준을 통한 설비와 안전시스템의 신뢰성 검증 절차 운영을 위한 "안전인증제도"의 자율적 향상화.

• 한국가스학회지
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• 제19권6호
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• pp.105-109
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• 2015

본 연구는 해상 유류오염사고가 발생한 경우 효율적인 방재 작업을 수행하기 위하여 개발된 오일 회수장치로서, 오일 회수장치를 통하여 해상에 유출된 기름을 높은 회수율로 신속하게 처리하는 것을 목표로 한다. 오일 회수장치는 기존의 흡착포 및 유류처리제를 이용한 정화 방식에서 발생하는 2차 오염을 방지할 수 있으며 오일 회수율 또한 우수한 특징을 가진다. 또한 유증기에 의한 폭발 방지 기구를 채택하여 오일 회수 작업시 발생할 수 있는 위험 요소를 제거 하였다.

• 한국전자통신학회논문지
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• 제15권2호
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• pp.267-272
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• 2020

현재 석유화학산업단지는 폭발성 가스와 가연성 가스로인하여 언제나 폭발 위험성이 상존하고 있다. 이러한 폭발을 방지하고자 제어기 및 제어기 패널을 포함한 모든 설비에 방폭을 요구하고 있다. 방폭용으로 현재 사용하고 있는 제어기 패널은 패널의 내부와 외부의 압력(양압)과 온도를 일정하게 유지를 위해 외부에서 수동으로 공기를 주입하는 방식을 사용하고 있다. 이에 본 논문은 자동으로 압력과 온도를 제어할 수 있는 방폭형 패널의 통합 제어기 설계를 제안한다.

• 한국수소및신에너지학회논문집
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• 제34권6호
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• pp.734-740
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• 2023

Hydrogen emphasis on safety management due to its high potential for accidents from wide explosive limits and low ignition energy. To prevent accidents, appropriate explosion-proof electrical equipment with installed to safe management of ignition sources. However, designing all facilities with explosion-proof structures can significantly increase costs and impose limitations. In this study, we optimize the barrier to effectively control the initial momentum in case of hydrogen release and form the control room as a non-hazardous area. We employed response surface method (RSM), the barrier distance, width and height of the barrier were set as variables. The Box-Behnken design method the selection of 15 cases, and FLACS assessed the presence of hazardous area. Analysis of variance (ANOVA) analysis resulting in an optimized barrier area. Through this methodology, the workplace can optimize the barrier according to the actual workplace conditions and classify reasonable hazardous area, which is believed to secure safety in hydrogen facilities and minimize economic burden.

• 한국가스학회지
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• 제26권1호
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• pp.27-33
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• 2022

가스 취급 및 저장시설의 확충과 더불어 폭발의 규모가 다양해짐에 따라 사고를 대비한 방폭 설비 관련 연구가 활발하게 이루어지고 있다. 방폭 인증시험 대상 설비 중 하나인 가스차단문은 폭풍파나 내부 화재로 인한 팽창압력을 차단하는 동시에 내부의 인원과 장비를 보호하는 역할을 한다. 현재 사용되는 가스차단문은 방폭성능 인증시험 대상 설비임에도 방폭 설계 관련 규정이 명확히 제시되지 않고 있으며 해당 설비의 폭발압력저항성능평가에 관한 연구는 미비한 실정이다. 이에 본 연구에서는 미국재료시험협회(ASTM)에서 제시하는 가스차단문 규격에 관한 규정(ASTM F-1069-87, F-1068-90)을 참고하여 가스차단문을 3D 형상으로 모델링하고 ANSYS Explicit Dynamics 해석을 통해 기준 대비 가스차단문의 영구적 변형량을 비교하였다. 또한, 방폭 설비 관련 연구에서 사용되고 있는 회전연성도·변위연성도 계산을 통한 방폭성능 평가 방법을 함께 고려하여 가스차단문의 수치해석적 폭발압력저항 성능평가를 수행하였다.