• Clean Technology
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• v.18 no.1
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• pp.14-21
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• 2012

The pros and cons of green building thermal insulation materials and systems have been reviewed from traditional thermal insulation materials such as mineral wool and polyurethane to new thermal insulation materials like VIP and aerogel and future insulating VIM and DIM. VIPs and aerogels with very low thermal conductivity can use for green buildings to significantly increase residential area by reducing energy consumption. Aerogels can be produced as not only opaque and but also translucent forms, thus enabling a wide range of possible building application. For building applications, there are many properties to consider like building site adaptability and mechanical strength, fire protection, cost and environmental impact.

• Fire Science and Engineering
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• v.26 no.3
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• pp.106-111
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• 2012

In this study, EIFS (Exterior insulation finish system) of exterior cladding was applied Cone calorimeter test to confirm the effect of flame retardant. As a results, the initial ignition points in accordance with the coated form and concentration of the flame retardant was delayed. But flame resistant treatment of EIFS cladding to control the fire will not affect confirmed that. In addition, EIFS that uses high-density and low-density due to difference in the density of the impact of the fire was no difference. The exterior of the ignition experiment occurred before and after 40 seconds, heat release rate to 100 seconds appears to occur about 90 % compared with the other exterior wall materials, the initial fire spread very fast was confirmed. EIFS cladding in order to prevent the spread of fire in the application of EIFS legally use is limited by the use of the building. And flame spread can be prevented, such as a vertical outer wall compartment measures are urgently needed.

• The Magazine for Energy Service Companies
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• s.64
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• pp.14-17
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• 2010

친환경 건축물은 자연친화적인 건물을 실현해 사용에너지를 최소화하고 탄소배출을 줄이는 것을 목표로 한다. 에너지사용을 먼저 줄인 후 그 다음 신재생에너지로 필요한 에너지를 충당해야 한다는 것. 때문에 친환경 건축 설계기법으로 최적향 선택과 에너지효율화를 높일 수 있는 외피시스템, 고성능 단열재, 고 단열 창호, 폐열회수환기시스템 등이 거론되고 있다. 친환경 건축의 바른 길을 위해 숙지해야 할 요소를 짚어보았다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.495-498
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• 2004

대전시 유성구 한국원자력연구소 부근 지역의 심부 단열대 확인을 위해 BHTV 검층, 일정구간별 정압 주입시험을 실시하였다. BHTV 조사 결과 A Zone(100m～120m)과 B Zone(250m～280m)이 연결되었다고 판단되며, 일정구간별 정압주입시험을 통해 B Zone(250m～280m)과 C Zone(400～420m)의 연결성을 추측할 수 있었다. 또한, 시추공의 심도별 지하수위 자료를 통해 지하 250m 부근에서 그 상부와 하부의 지하수 시스템이 연속되지 않은 독립된 시스템을 갖는다고 추측된다. 이러한 결론은 MP system이 설치된 시추공의 구간별 압력변화 결과에 의해서도 확인된다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.758-761
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• 2010

본 연구에서는 원전격납구조물과 같이 고품질의 대형 매스콘크리트의 설계, 시공, 품질예측 및 관리에 필요한 구조물 건전성 평가시스템 구축의 일환으로 수화열 예측 프로그램을 개발하였다. 개발된 수화열 예측 프로그램은 국내에서 생산된 시멘트 및 결합재의 화학조성성분, 분말도와 같은 기초정보 및 배합정보를 입력하여 경시변화에 따른 수화발열량을 계산하는 방식으로서 기존의 연구결과를 바탕으로 개발되었다. 개발된 프로그램은 배합환경조건을 고려하여 초기배합온도 3종류(10, 20, $30^{\circ}C$)로 실험한 단열온도상승 실험 결과와 비교해 보았으며, 좋은 상관성을 나타냄을 확인할 수 있었다.

• Journal of Advanced Marine Engineering and Technology
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• v.36 no.8
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• pp.1097-1103
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• 2012

There are many fish farms being cultivated in the southwestern cost of South Korea. Because the farms cultivating use the basic method that inflow and circulate sea-water, slight negligence and bad design cause major negative impact on fish deaths. Also, the optimal temperature for each specie of fishes has already been proven to differ on each specie. Maintaining this environment, regardless of seasons, is very difficult and that requires research to develop. In this paper, basic characteristics of heat and mechanism of heat transfer are studied. Based on this, Open-end water vessel is designed and constructed using sandwich-insulation panels and simulated to store the heat in certain isolated space. This study confirmed that it is possible to keep constant temperature by this method, in large areas of water where it is insulated by heat insulator. and equipped with heater in Open-end water vessel where the other part is heated. The AC power controller maintains the constant temperature required and the temperature controller detects and displays the temperature by using the micro-processor.

• 월간 기계설비
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• s.306
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• pp.87-93
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• 2016

중소기업청은 지난 해 12월 30일 '중소기업자간 경쟁제품 지정내역 및 공사용 자재 직접구매 대상품목'을 개정하고 올해 1월 1일부터 3년(2018.12.31)간 적용에 들어갔다. 개정된 공사용 자재 직접구매 대상품목 중 그동안 대한기계설비건설협회(회장 이상일)가 지정 제외를 위해 총력을 기울였던 고무발포단열재가 기존 공사용자재 직접구매 대상품목 중에서 유일하게 제외됐다. 새로 개정된 공사용 자재 직접구매 대상품목은 고무발포단열재, 애자, 공기살균기, 플라스틱포대 등 4개 품목이 빠지고 신규 지정을 신청한 12개 품목 중 8개(커튼, 차양, 볼라드, 잡석, 데이터 포트장치, 디지털영상 정보 안내시스템, 막구조물, 포설형 탄성 포장재)만 채택돼 총 127개 품목으로 확정됐다. 고무발포단열재가 공사용 자재 직접구매 대상품목에서 제외됨으로써 앞으로 기계설비건설업계의 매출 신장과 생산성 향상에 크게 기여할 것으로 기대되고 있다.

• Journal of Aerospace System Engineering
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• v.18 no.3
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• pp.70-75
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• 2024

The insulation performance of a common bulkhead propellant tank for small launch vehicles with variations in insulation thickness was analyzed. The common bulkhead propellant tank composed of a single part allows for lightweight design, as it eliminates the need for tank connections. However, problems such as propellant loss and ignition delay due to heat transfer caused by temperature differences between oxidizer and fuel may arise. Therefore, it is essential to verify the insulation performance of the common bulkhead structure that separates the oxidizer tank and fuel tank. In this study, transient heat transfer analysis was conducted for propellant tanks with insulation thicknesses of (50, 55, 60, 65, and 70) mm to analyze the insulation performance using boil-off mass. Subsequently, the boil-off mass of the oxidizer generated during the first-stage flight time of the propellant tank was determined. The results confirmed that increasing the insulation thickness reduces the boil-off mass, thereby improving the insulation performance.

• Tunnel and Underground Space
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• v.16 no.4 s.63
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• pp.307-312
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• 2006

Radionuclide released from corroded container migrates through groundwater flow pathway in the underground rock. Therefore it is important to study the groundwater flow analysis for total system performance assessment of a HLW repository. In this study assuming a geological change of underground rock in future, the two dimensional groundwater flow analysis is done by the NAMMU, the assessment code for groundwater flow in porous media. Assuming the hypothetical repository with the reactivation of fault in the vicinity of it, the effect of change in aperture and permeability by reactivation of fault around a repository on groundwater pathway is studied.

• Fire Science and Engineering
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• v.27 no.3
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• pp.60-65
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• 2013

EIFS system has the merit of low construction cost and shortening of construction period by easy-to-construct. For such reasons as mentioned above, it has been using across the board such as residential building, school, officetel, building remodeling and so on. It, however, has a drawback of generating plenty of combustible gases from styrofoam which is main material of it. In this regard, measures to prevent losses of life from combustible gases are needed urgently as fires on residential buildings applied EIFS caused human casualties resulted from combustible gases. With respect to the above, this study will analyze the risk of fires on residential facilities, such as multi-family apartment houses, schools and other buildings, applied EIFS which is the most frequently used as material of exterior wall and suggest countermeasure of it.