• 한국화재소방학회논문지
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• 제34권4호
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• pp.101-106
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• 2020

자체 제작된 니들 플레임을 이용하여 바닥재를 수직 연소시켰을 때의 화염의 성장 특성 및 탄화 패턴을 해석하였다. PVC 장판은 난연성이 있는 것으로 확인되었고, 직사 화염을 받은 곳은 안쪽으로 수축되는 패턴을 나타냈다. 수직 연소가 진행되면 하부에 망울 형태의 고형화가 발생하며, 그을음은 상부로 성장하는 패턴이 형성된다. 강화마루는 난연성이 없는 것으로 확인되었으며, 상부 표면인 라미네이트층의 소실과 불규칙적인 박리가 형성되는 것을 알 수 있다. 좌측면과 우측면의 탄화의 범위는 대칭적 구조를 나타내는 것으로 해석된다. 강화마루와 마찬가지로 카펫은 수직 연소 실험에서 난연성이 없는 것이 확인되었다. 카펫에 축열이 형성되면 화염은 상승기류를 형성하고, 주변에 가연성 물질이 있을 때 화염의 확산은 더욱 촉진하는 것을 알 수 있었다. 직사화염을 받은 카펫 표면의 탄화 패턴은 표면이 용융되어 흘러내렸을 뿐만 아니라 작은 구멍이 다수 발생되는 것을 알 수 있다.

• 한국환경복원기술학회지
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• 제2권4호
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• pp.16-26
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• 1999

Five soil mixture with seven turfgrass species when placed over a plastic sheet were evaluated for influence on covering rate, visual rating, visual color and sad development. The result were as follows. 1. The last covering rate was high on sand+bark and on Kentucky bluegrass, respectively while the early covering rate was high on sand+peat and on perennial ryegrass and tall fescue. respectively. 2. Both sand and sand+sandy loam caused poor effects on the covering rate and the visual rating. 3. The early growth was good on perennial ryegrass but the covering rate and the visual rating gradually turned poor because of summer drought. 4. Visual color was high on sand+bark and on Kentucky bluegrass, respectively. 5. Covering rate, visual rating and visual color was best evaluated on Kentucky bluegrass during winter. 6. Sad was highly developed on sand+bark and sand+peat as compared with on the other soil mixture. 7. The carpet-type sad was best developed on Kentucky bluegrass.

• 설비공학논문집
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• 제18권2호
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• pp.137-143
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• 2006

This study has been conducted to quantify the emissions of Volatile Organic Compounds (VOCs) in a conference room. The carpet has emitted a variety of VOCs, but in this study, 2 VOCs compounds have been considered: Ethylbenzene and 1, 2, 3-Trimethylbenzene. In this study, a three dimensional numerical analysis has been carried out to investigate the emission and behavior characteristics of Ethylbenzene and 1, 2, 3-Trimethylbenzene emitted from the carpet in the conference room. The mass diffusion coefficient and the initial concentrations of VOCs in the carpet have been obtained from experimental data with non-linear regression. It has been found that the concentrations and emission factors of VOCs have exponentially decayed with time and that the concentration gradients and emission factors of VOCs are different from each other for various components. This study may supply fundamental understandings for the emission and behavior characteristics of VOCs.

• 한국음향학회지
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• 제34권4호
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• pp.282-287
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• 2015

본 논문은 공연장에서 의자 설치 조건의 변화가 의자의 흡음특성에 미치는 영향에 관하여 실험적인 연구를 실시하였다. 실제 공연장 의자의 흡음특성을 재현한 1/10 스케일의 축소 의자와 인체모형을 이용하여 실험을 진행하였다. 실험변수로는 의자의 흡음정도, 의자 열 간격의 변화, 청중의 착석유무, 그리고 바닥의 카펫설치 유무로 제한하였다. 열 간격에 따른 청중의 착석 및 바닥의 카펫설치 유무의 영향을 평균적으로 분석하였을 때 의자의 흡음률이 낮을수록 즉, 카펫 혹은 청중 등의 부가적인 흡음력이 없을 때, 열 간격에 의한 흡음률 변화폭이 작게 나타났다. 의자 열 간격 평균 주파수 대역별 흡음률 증가 값에 따르면 주변 인자에 의한 흡음률의 변화는 주파수대역별로 다르게 나타났다.

• 복식문화학회:학술대회논문집
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• 복식문화학회 2006년도 Seoul The Costume Culture Association & Ars Textrina Joint International Conference
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• pp.55-55
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• 2006

• 건축사
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• 10호통권462호
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• pp.103-103
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• 2007

• 복식문화학회:학술대회논문집
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• 복식문화학회 2005년도 정기총회 및 춘계학술대회 Proceeding
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• pp.71-73
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• 2005

• 섬유기술과 산업
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• 제6권1_2호
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• pp.41-50
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• 2002

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 1996년도 학술발표회
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• pp.24-29
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• 1996

The objective of this research is to study on the formations of thermal stratification in a room in case of several furniture fires such as trashcan, chair, carpet, sofa, mattress and wardrobe as a fire starter in a residential room by performing the experimental studies. The uniformly distributed fire in case of carpet showed that the ignition and the initial growth period were relatively short while the fully developed period was considerably long. The concentrated fires such as the mattress and wardrobe showed that the ignitions and the initial growth periods were relatively long. When fire spread to only one direction, like the case for the trashcan with a regular shape, there was one peak of temperature profile, and for the irregular shaped furniture such as chair, sofa, mattress and wardrobe, there were two or more peaks. The interface heights for the furniture fires were around 1(m) mataining constant state. However, at the time of the maximum temperature, the interface height was lowered to 0.25(m)-0.75(m) from the floor

• 한국안전학회지
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• 제12권4호
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• pp.70-78
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• 1997

The objective of this research is to study on the upper and lower layer temperature, interface height and pressure in case of carpet, chair, trashcan and wardrobe fires in a residential room by performing the theoretical and experimental studies. The theoretical results of the upper and lower layer temperature, the interface height and the pressure were qualitatively well coincided with the experimental results. The uniformly distributed fire in case of carpet showed that the ignition and the initial growth period were relatively short while the fully developed period was considerably long. The concentrated fires such as the wardrobe showed that the ignitions and the initial growth periods were relatively long. The interface heights were around 1m as the steady state. However, at the time of the maximum temperature, the interface height was lowered to 0.5m from the floor. The pressure variation in the fire room ranged between 0.1mmAq and 0.4mmAq, and the temperature reached the highest while the pressure was maximum.