• 한국가스학회지
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• 제7권1호
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• pp.24-27
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• 2003

본 연구에서는 국내 석유화학공장에서 운전되고 있는 CDU plant heater, NCC plant heater, CO plant Heater, aromatic plant heater 등 15개 plant heater를 대상으로 조사하였으며, 세부 내용으로는 heater 사고 예방을 위한 공정운전 표준, alarm 작동시 조치 및 setting 변경, 시운전 점검사항, interlock system 분석, interlock by-pass 운전현황, heater 주요 사고$\cdot$사례 등을 분석하였다. interlock 방지 및 시설개선 대책으로 실시간 monitoring 설치, local 압력계 및 온도계추가설치, 초기 운전시 점검방법, interlock by-pass 관리, 오작동 계기 sensor maker 변경, 운전 mode 변경시 주요 현장확인사항, DCS alarm 관리방법 등을 제시하였다. heater interlock에 관련되는 국내외 연구자료가 거의 없어서 주로 석유화학업체 운전 절차서, 공정trouble 일지, 부서장 및 현장 운전원의 의견을 반영하여 연구하였다. 연구의 결과에 따라 interlock 방지 및 시설개선 대책을 운전 절차서에 반영한다면 interlock으로 인한 사고를 크게 줄일 수 있을 것으로 기대된다.

• 한국가스학회지
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• 제5권4호
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• pp.62-69
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• 2001

가스안전기기는 가정집에서 일어나는 중대사고를 매우 효율적으로 방지할 수 있다. 안전기기는 가정용 가스기기에 소화안전장치 등이 부착되어 있고 배관에 퓨즈콕, 가스경보차단기 등이 설치되어 있다. 그러나 이와 같은 안전기기가 설치되어 있어도 매년 수 백건의 가스사고가 발생하고 있다. 본 연구에서는 국내 가정에서 발생한 5년간의 가스사고를 결함수목분석도(FTA)를 이용하여 체계적이고 세부적으로 분석하여 가정용 가스안전기기의 각각에 대한 실효성을 검정하고, 안전기기의 보급에 따라 가스사고가 정량적으로 감소함을 제시하였다. 769건의 가정에서 일어난 사고를 분석한 결과 안전기기의 실효성은 다기능가스안전계량 기(마이콤미터)가 가장 크고, 퓨즈콕, 가스누출경보기, 일산화탄소 경보기 순으로 나타났다. 위 안전기기를 가정집에 $100\%$ 보급하는 경우에는 현재 일어나고 있는 사고의 약 $59\%$를 방지할 수 있고, 또한 대부분의 인명피해를 동반하는 대형사고를 방지할 수 있다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권5호
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• pp.206-212
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• 2005

In this paper, criterion and algorithm for on-line dissolved gas of a Power transformer are studied. For the initial diagnosis of a power transformer, the on-line dissolved gas analysis is one of the most important and acceptable item to preventively diagnose a power transformer. But the criterion and algorithm of this item are not established yet in korea. In this paper, criterion and alarm level of the on-line dissolved gas analysis are based on the analysis of on-line data of operating transformers, Korea industrial standard and operation manual for a power transformer as well as accumulated data of the preventive diagnosis systems which have been operated at nine substations of Korea Electric Power Co.(KEPCO) since 1997, Therefore, the criterion and alarm level proposed in this paper are to be well suitable and are adaptable for the domestic operational environments and conditions of the power transformer. Considering that the conventional diagnosis system is capable only of accumulating and monitoring data of the power transformer operation, the criteria and the algorithms make it possible to accomplish an ultimate goal of the preventive diagnosis system. It is expected, therefore, that they will have a beneficial effect on broad applications of the preventive diagnosis system and the achievement of manless substation system in the future.

• 한국인공지능학회지
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• 제4권1호
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• pp.8-10
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• 2016

These days, citizens have a lot of ways to get access to IT. In the past, they tended to neglect IT that was thought to be difficult. But, currently, everyone can manufacture and get access not only software but also hardware when he has an idea. Arduino is used. Rinnai had recently released new product named Smart Sensor Range. Safe consumer who gave priority to the safety made new trend gave attention to fire prevention and smart sensor range. The ones who buy gas range prefer safety to economic advantage and/or fire power. The safety system does not always prevent fire accident. This study makes design and produces alarm that perceives temperature of pot when boiling. Not only temperature sensor but also alarm sensor was used to make alarm of boiling water and to give convenient living life. The arduino can be used at practical life to make products for various kinds of people. The invention can give convenience to housewives at kitchen, children and many persons making use of gas range. Another function can be added to develop. This arduino can develop a lot of products by using the study and other designs.

• 대한전자공학회논문지
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• 제25권4호
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• pp.407-416
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• 1988

Thick film city gas sensors were fabricated using \ulcornerFe2O3 and \ulcorner-Fe2O3 as raw materials. Their electrical properties and sensitivity characteristics were investigated and the surface conditions for various firing temperatures were analyzed. The fabricated devices exhibited high sensitivity to butane gas(75~80% n 1, 000ppm butane ambient). Also they showed good selectivity and long-term stability. A city gas alarm system using fabricated sensors was made for the practical application.

• 대한안전경영과학회지
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• 제12권2호
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• pp.75-82
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• 2010

Gas turbines for power generating operate in a very high temperature condition and use natural gas for fuel. For this reason, many cases of damage happen at hot gas parts which are severely affected by high temperature gas and many cases of explosion occur by fuel gas. So a lot of efforts should be made to prevent hot gas parts damage and gas explosion accidents. Though there are many damage cases and explosion accidents, it is very difficult to find out the root causes of hot gas parts damage caused by gas explosion due to gas leakage in the heat exchanger for air cooling and gas heating. To prevent gas turbine from damage caused by gas explosion, removal of leakage gas from gas turbine is inevitably required before firing the gas turbine and installing alarm systems is also required for detecting gas leakage at stop valve to turbine while shut down.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2010년도 춘계학술대회
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• pp.81-95
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• 2010

Gas turbines generating power operate in high temperature condition and use natural gas as fuel. For that reason, there are many cases where damage is done to the hot gas parts caused by the high temperature and many accidents occur like gas explosions, then various efforts are needed to maintain the hot gas parts and prevent accidents. It is difficult to find the root causes of damage to the hot gas parts from the gas explosion caused by gas leakage through rotor cooling air line from fuel gas heat exchanger during the shut down. To prevent gas turbine from damage, removal of gas leakage inside of gas turbine is required by purging the turbine before firing, improving the fuel gas heating system and installing alarm systems for detecting gas leakage from stop valve to turbine while the gas turbine has shut down.

• 한국전자통신학회논문지
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• 제13권6호
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• pp.1411-1416
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• 2018

현재 화학, 제조, 조선, 철강 등 대부분의 공업 지역에서는 가스와 관련된 작업을 진행하게 되는데 이러한 작업을 수행하는 담당자의 경우 가스 누출 등의 사고를 인지하지 못하고 질식하는 등의 위험을 안고 작업을 진행하게 된다. 그 예로 2015년 파주에서 질소 가스가 누출돼 2명이 사망하고 4명이 부상을 당하였고 2018년에는 포항에서 4명의 근로자가 질소가스에 질식하여 사망하는 사고가 발생하였다. 이러한 문제를 해결하고자 본 연구에서는 현장 작업자가 필수로 착용하여야 하는 안전모에 가스 센서와 통신모듈 등으로 구성된 IoT 장치를 장착하여 작업자가 가스의 누출을 즉각적으로 인지함과 동시에 안전담당자에게 상황을 전달할 수 있는 시스템을 구현하여 이를 통해 산업 현장에서 가스 누출에 대한 인명사고를 줄일 수 있기를 기대한다.

• International journal of advanced smart convergence
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• 제7권2호
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• pp.112-118
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• 2018

This paper describes the design and implementation of a vehicle internal alarm system using raspberry-pie and gas sensor. It provides a notification system for sleepiness during driving, a driving time notification system and a smoking detection system. We coded using 'Python'. And we use 'MySQL' and 'PHP' to build the necessary servers and web pages for gathering sensing data and monitoring. The developed system was tested by several methods. All experiments showed satisfactory response signals and detected with immediate responses.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2008년도 춘계학술 발표회
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• pp.217-222
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• 2008

In the last five years, 45 people died and 104 were wounded because of carbon monoxide poisoning accident. CO poisoning accident is higher than any other gas accident in the rate of deaths/incidents. Most of these CO poisoning accidents were caused by defective exhaust tube in the old gas boiler and multi-use facility. In this study, the spread of CO gas released from leakage hole of exhaust tube was analyzed by concentration measuring test. CO gas leaked form exhaust tube in a building was highest concentrated near the ceiling. Through these experiments, the reasonable installation location of CO alarm was made certain and suggested.