• Applied Chemistry for Engineering
• /
• v.27 no.1
• /
• pp.39-44
• /
• 2016

This study was to investigate the characteristics of combustion toxic gases of pinus rigida specimens treated with chemical additives such as pyrophosphoric acid (PP)/ammonuium ion ($NH_4{^+}$), methylenepiperazinomethyl-bis-phosphonic acid (PIPEABP) and $PIPEABP/NH_4{^+}$. Each pinus rigida plates was painted in three times with 15 wt% of each chemical additives in the aqueous solution. After drying these specimens at room temperature, the production of combustion gases and smoke was examined by the cone calorimeter (ISO 5660-1). As a result, the peak mass loss rate time (PMLR time) treated with chemicals was delayed upto 10.5~47.4% compared to that of using untreated specimen. In addition, the peak production of carbon monoxide ($CO\;_{peak}$) of 32.1~71.4% and total smoke release rate (TSRR) of 15.6~43.6% for test pieces treated with the chemical additive were higher than that of using the virgin plate. In particular, for the specimens treated with the chemical additive, the rate of smoke release (RSR) 29.4~41.5% was obtained higher than that of untreated plate except the specimen treated with $PP/4NH_4{^+}$. It can thus be concluded that the treatment using the chemical additive could partially increase the combustion-retardation properties of the species when compared to those of the virgin plate.

• Agrochemical news magazine
• /
• v.14 no.3 s.114
• /
• pp.74-75
• /
• 1993

• Proceedings of the Korean Nuclear Society Conference
• /
• 1996.05d
• /
• pp.543-548
• /
• 1996

국내 가압 경수형 원자력 발전소 주제이실의 바닥에 가장 적합한 화재 감지기 선정을 위하여 원전 심사, 검사시 적용한 국내·외 화재감지기 설계 및 설치에 관한 법규와 규제요건의 종합적인 검토를 수행하고 원전의 주제이실 바닥 환경을 최대로 모의한 시험장치를 이용하여 선형열감지기와 공기 표본 추출형 연기감지기의 동작 성능을 비교 시험하였다. 시험 결과 케이블 화재시 공기 표본 추출형 연기감지기가 감도 및 응답특성이 정온식 선형 감지기 보다 우수한 것으로 확인되었다.

• Journal of Korean Tunnelling and Underground Space Association
• /
• v.22 no.5
• /
• pp.563-574
• /
• 2020

Currently, road tunnels and railroad tunnels are building smoke control systems to emit toxic gases and smoke from fires. Among the various smoke control systems, the transverse smoke control system has the disadvantage that air supply or exhaust is performed on only half of the cross-section, rather than air supply or exhaust on the entire cross-section of the tunnel as air is supplied or exhausted by partitioning the wind path. Therefore, this study analyzed the effect of exhaustion through numerical analysis and scaled model tests on the zoning smoke control system, which improved the limitations of the transverse smoke control system. As a result of the scaled model test, the transverse ventilation system exhibited a 25.6% smoke control rate based on the state where no smoke was controled, and zoning smoke control system showed a smoke control rate of 40.8%. In addition, as a result of numerical analysis, it was found that transverse ventilation system did not control fire smoke spreading from the tunnel and continued to spread. On the other hand, zoning smoke control system was found to be smoke controled within a certain section due to the air curtain effect and the flue gas effect.

• The Monthly Technology and Standards
• /
• s.101
• /
• pp.22-23
• /
• 2010

미국 에너지스타 제도가 강화됨에 따라 기술표준원은 국내의 관련 업계와 단체의 전문가들로 T/F를 구성하고 대응방안을 논의하였다. 우선적으로 미국 정부에 시행연기를 요청하고, KOLAS(국내 시험소인정기구)가 인정한 국내 시험소에서도 에너지스타 성적서를 발급받을 수 있는 방안을 추진하기로 하였다.

• Proceedings of the Korea Contents Association Conference
• /
• 2018.05a
• /
• pp.311-312
• /
• 2018

신데렐라가 찾고 있는 잃어버린 신발은 현대인들이 추구하는 행복, 꿈, 무의식, 허구이며, 그 여정은 비가시적인 공간 속으로 길을 내고 찾는 여행이다. 동화 신데렐라 이야기의 각색, 구두의 이미지 변환과 역설적 표현으로 풀어나갔으며 본 작품은 제 12회 전국무용제에서 금상 및 최우수 연기상 수상작이다.

• Journal of Teachers' Pension
• /
• v.3
• /
• pp.11-67
• /
• 2018

본 연구는 공적 연기금인 사학연금기금의 책임투자 활성화 및 스튜어드십 코드의 이행을 위한 전략적 방향성을 제안한다. 책임투자와 스튜어드십 코드 도입의 의미와 논쟁, 해외 연기금의 사례, 사학연금기금의 현황 및 여건 등을 종합적으로 고려할 때, 다음과 같은 검토사항들을 도출하였다. (1) 책임투자 및 스튜어드십 코드 이행을 위한 정책 및 지침의 제·개정, (2) 내부 조직의 확대·개편, (3) 자체적인 ESG 평가 모형 구축과 다양한 외부 평가기관의 자료 확보·활용, (4) 외부 위탁운용사 평가 체계 개선, (5) 책임투자 및 주주권 행사 관련 공시 강화가 그것들이다. 본 연구는사학연금기금의 효과적인 위험관리와 중·장기적 수익의 안정성을 제고하기 위한 대안으로써 책임투자의 성공적 도입을 위한 제반 여건을 제시하는 실무적 시사점을 가질 것으로 기대된다.

• Applied Biological Chemistry
• /
• v.47 no.3
• /
• pp.332-338
• /
• 2004

An investigation in search of the best oxidizing agent for smoke generators using rice chaff as a combustible carrier was carried out. Smoke rods formulated with active ingredients (AIs) such as inorganic oxidizing agents, glue, and powdered rice chaff, showed constant and high burning rate and high smoking rate on 11 kinds of pesticides. Sodium chlorate was the most suitable oxidizing agent for smoke rod. Even though the sodium chlorate content of the formulation showing the highest smoking rate of AI was variable to pesticides, the smoking rate appeared to increase as the burning rate increased. Active ingredients in smoke generator using rice chaff as a combustible carrier were stable for 60 days when stored at $50^{\circ}C$. An apparatus designed for smoke trapping was useful to collect smoked active ingredients.

• Journal of the Korean Society of Propulsion Engineers
• /
• v.24 no.4
• /
• pp.41-47
• /
• 2020

This study aims to develop eco-friendly propellant that reduce the generation of harmful gases such as HCl gas and increase the emmision of nitrogen gas emissions. For this purpose, GUDN(N-Guanylurea dinitramide) and BTATz(3,6-bis(1H-1,2,3,4-tetrazol-5-ylamino)-1,2,4,5-tetrazine), which are low carbon high nitrogen materials, were used instead of AP(Ammonium Perchlorate) and Al(Aluminium), which are gernerally used in solid propellant. The prepared propellants were analyzed for mechanical properties and combustion characteristics, performance and AGARD smoke classification. Compared with AP/Al propellant, GUDN/BTATz propellant tended to decrease mechanical and combustion rate. Also, as a result of the static test after the production of the 4-inch motor, the performance of combustion of the GUDN/BTATz propellant decreased, but it was confirmed that the secondary smoke was improved by reducing harmful gases such as HCl gas.

• Fire Science and Engineering
• /
• v.12 no.4
• /
• pp.41-49
• /
• 1998

In this study, the thermal improvement of an isophthalic acid polyester resin by the incorporation of flame retardants has been investigated. Aluminium hydroxide, antimony oxide and alumina powder were used to formulate the flame retardant systems. The improvement of an isophthalic resin by incorporating aluminium hydroxide is dramatic(burning rate and smoke emission are reduced), although the mechanical property is decreased significantly. The addition of small amount(2.5 phr) of antimony oxide produces high char yield(31%) which acts as a protective layer on the surface of the resin.