• Title, Summary, Keyword: 단열성능

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Changes in Insulation Performance of Organic Insulating Materials for Building Construction by Accelerated Durability Test Conditions (가속내구성 조건에 따른 건축용 유기계 단열재의 단열성능 변화)

  • Lim, Soon-Hyun;Lee, Gun-Cheol
    • Journal of the Korea Institute of Building Construction
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    • v.16 no.6
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    • pp.595-601
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    • 2016
  • The insulation performance of the insulation currently used in building structures is reflected only during design based on initial performance and the reduction in heat insulation performance due to the degradation of long-term durability is not reflected. This study reviewed the degradation of heat insulation performance due to the durability degradation of insulating materials through the accelerated durability test. The study findings showed that the foamed polystyrene insulation bead method did not show performance degradation due to aging in the standard environmental condition and laboratory accelerated test condition but the performance is degraded in the freeze-thaw test condition. On the other hand, in the case of the extrusion method, the degradation of the heat insulation performance was less in the freeze-thaw test condition, but the rapid performance degradation was caused by the release of the internal gas at the beginning of aging. In addition, the hard polyurethane foam insulation showed better initial insulation performance than other insulation materials, but the performance was found to be degraded somewhat under laboratory accelerated test conditions and freeze-thaw test conditions.

Finite Element Analysis of Adiabatic Properties for the Wall System in Wood Frame House (유한요소법을 이용한 벽체의 단열 성능 분석)

  • Shim, Kug-Bo;Lee, Jun-Jae
    • Journal of the Korean Wood Science and Technology
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    • v.23 no.3
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    • pp.48-57
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    • 1995
  • 본 연구에서는 경골 목조 주택 (2${\times}$4 주택, 2${\times}$6 주택), 통나무 주택 및 콘크리트 주택(내단열, 중단열, 외단열) 벽체에 대하여 유한 요소 해석으로 단열 성능을 평가하였고, 표면 결로 현상을 분석하여 다음과 같은 결론을 얻었다. 1. 벽체의 단열 성능은 정량 골조 2${\times}$6를 사용한 주택이 가장 우수하였고, 경량 골조 2${\times}$4 주택, 통나무 주택, 콘크리트 주택의 순으로 감소하는 것으로 나타났다. 2. 콘크리트 벽체의 내단열, 중단열, 외단열의 벽체 구성법에 따른 단열 성능의 차이는 없었으며, 콘크리트 주택에서 단열재의 사용이 필수적이었다. 3. 내부 결로의 경우 콘크리트 벽체의 외단열이 가장 우수한 결로 예방성을 보였다. 이는 외부에 설치된 단열층이 외부의 낮은 온도를 차단해 벽체 전체의 온도를 높게 유지하기 때문이었다. 표면 결로는 모든 벽체에서 나타나지 않았지만, 실내 습도가 높아진다면 콘크리트 주택의 벽체에서 발생할 가능성이 가장 높았다. 본 연구는 벽체내의 단열 성능에 관하여만 분석을 하였고, 열전달 외에 축열성능 등에 관한 고려는 하지 않았으므로 추후에는 여러 가지 복합적인 열적 성능에 관한 연구가 수행되어야 하리라고 생각한다.

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Thermal Insulation Performance of Composite Waterproofing Method of Thermal Supplement Type (단열 보완형 복합방수공법의 단열성능에 관한 연구)

  • Choi, Sung-Min
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.18 no.4
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    • pp.59-66
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    • 2014
  • Insulation of rooftop is one of the major performance to energy-saving construction. Further, waterproofing performance is also important. For such a reason, it is need to develop waterproofing method containing thermal insulation property. This study was wanted to evaluate thermal insulation performance about the composite waterproofing method of thermal supplement type that is developed recently. As a result of waterproofing performance test, every test item was showed over the performance standards of KS (Korean (Industrial) Standards). And the result of thermal insulation performance test, the highest temperature in the styrofoam box was $25.91^{\circ}C$, the bubble sheet box was $17.28^{\circ}C$, the insulation sheet box was $15.47^{\circ}C$ and the waterproofing sheet box of thermal supplement type was $24.11^{\circ}C$. In observations of thermal bridges of sheet's joint, thermal bridges was not identified at the sheet's joint. As a result, composite waterproofing method of thermal supplement type is interpreted to have thermal insulation performance.

Comparative Performance Evaluation by Winter Apartment Temperature on the Outer Surface of the Insulation (동계 아파트 외표면 온도에 의한 단열성능 비교평가)

  • Park, Jung-Hun;Kim, Bong-Joo
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.17 no.4
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    • pp.91-100
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    • 2013
  • This research is to measure and analyze the thermal performance of the apartment structure and to evaluate and establish standards of thermal insulation defect in order to make the basic data necessary for determining the degree of the thermal performance degradation and for repairing and reinforcing the exterior wall of the existing apartment. Furthermore, it is to predict the part of occurrence of the thermal bridge and condensation at the apartment building structure. On the other one hand, it is also to analyze the degree of thermal insulation performance according to the standards of thermal insulation and elapsed time, through the analysis by the workability of concrete.

진공단열재의 단열성능을 개선을 위한 Glass Fiber 수평 배열(다층구조) 기술 개발

  • Han, Jeong-Pil;Hwang, Seung-Seok;Jeon, Seung-Min;Min, Byeong-Hun
    • Proceedings of the Korean Vacuum Society Conference
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    • pp.207-207
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    • 2012
  • 진공단열재는 폴리우레탄 폼 대비 10배 이상의 단열성능을 갖는 고효율 단열재로서 고차단성 필름 봉투 내부에 무기 소재를 진공감압시켜 대류에 의한 열전달을 최소화시킨 차세대 단열재이다. 특히 진공단열재에 있어 열전달의 경로는 전도에 의한 효과가 가장 크므로, 진공단열재 내부의 Glass Fiber 심재의 최적화 설계에 따라 단열 성능을 극대화 시킬 수 있다. 이에, 본 연구에서 GLass Fiber의 배열에 따른 성능 비교 평가를 통해, 전도의 특성을 최소화 시킬 수 있는 Glass Fiber의 배열 및 다층 적층 구조를 통해 성능 개선 효과를 고찰 하였다.

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A Study on the Insulation Performance of Composite Multilayer Insulation by Applciation of Heat Storage Tank (축열조용 복합 다층 단열재의 단열 성능 연구)

  • Choi, Gyuhong;Hwang, Seung Sik;Shin, Donghoon;Park, Woo Sung;Park, Dae Woong;Son, Seung Kil;Chung, Tae Yong
    • Journal of Energy Engineering
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    • v.23 no.3
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    • pp.82-87
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    • 2014
  • MLI(Multi-layer Insulation) is widely used to get highly insulating on cryogenic system in order to reduce heat loads. MLI for satellites thermal performance is changed by materials and laminated method. In this study, a composite multilayer insulation by application of heat stroage tank performance were compared with materials and laminated to change the way. Experimental methods of the KS C 9805 was used, the composite multilayer insulation and EPS was compared with the insulation performance. A method for analysis of experimental results is the equivalent thickness about CMI and the insulation performance were used to compare thermal conductance. As a results, the equivalnet thickenss and the thermal conductance of the composite multilayer insulation were smaller than the EPS and the thermal performance are more excellent. In addition, the configuration of the composite multilayer insulation materials and laminated method varies depending on the overall heat transfer coefficient was confirmed.

Comparative Studies of Thermal Insulation Performance of Life Vests by Numerical Analysis and Experiment (보온 재료에 따른 구명 조끼 별 단열성능의 비교 실험 및 해석)

  • Kim, Sung-Chan;Lee, Kyung-Hoon;Hwang, Se-Yun;Jang, Ho-Sang;Lee, Jang-Hyun
    • Journal of Navigation and Port Research
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    • v.40 no.1
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    • pp.7-14
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    • 2016
  • Although the life jacket can provide the buoyance with the drowner, heat loss can make the drowned individual be subject to the hypothermia. In this study, The thermal insulation of two types life jacket including inflatable and foam type were evaluate by both experiments and numerical analysis. To estimate the thermal resistance of the jackets, experiments on the heat flux were conducted by the thermal manikin exposed to cold water. Heat flux loss on the surface of thermal manikin were measured for both foam and inflatable type life jacket. Also, finite element method is applied to a body section in order to understand the level of hypothermia of each life jacket. The segmental of human thigh is represented by a multi-layered section which considers the heat conduction within tissue, bone and fat. As a result, the thermal resistance and hypothermia time of each jackets have been compared based on the finite element analysis. It was found that the insulation ability of suggested life jackets is better than that of conventional type.

Invention Methodology of High Strength Insulated Steel Stud using TRIZ (강도향상형 단열스터드 개발을 위한 트리즈 기법 활용방안)

  • Cho, Bong-Ho;Kim, Sun-Sook;Kwak, Chai-Eun
    • Korean Journal of Construction Engineering and Management
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    • v.14 no.3
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    • pp.33-41
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    • 2013
  • This study used TRIZ methodology to develop a new steel stud for load bearing or non-load bearing walls. Technical contradiction of high strength with high insulation performance can be solved by TRIZ. We suppose a new shape of high-strength insulated (HSI) Stud. This study showed TRIZ can be usefully applied to the development of new construction materials by solving technical contradictions. Insulation performance of HSI stud can be improved approximately 12% compared to the standard KS stud. Although up to 3.9% of the flexural strength degradation is expected, compressive strength of HSI studs are improved from 4.1% to 8%. In conclusion, improved thermal performance and higher strength can be expected for the HSI stud developed using TRIZ.

Durability of Concrete Using Insulation Performance Improvement Materials (단열성능 향상 재료를 사용한 콘크리트의 내구성에 관한 연구)

  • Park, Young-Shin;Kim, Jung-Ho;Kim, Se-Hwan;Kim, Sang-Heon;Jeon, Hyun-Kyu
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.19 no.3
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    • pp.22-29
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    • 2015
  • In this study, we tested to develop and apply structural insulation performance improvement concrete to field, which had compressive strength in 24 MPa and thermal conductivity twice as much as normal concrete. After experiment about slump and air contents, combination product of Plain and calcined diatomite powder showed reduction of slump and air contents and combination product with micro foam cell admixture, we cannot find result of slump and air contents reduction. Unit weight of combination product with insulation performance improvement materials decreased more than that of Plain. In the test of compressive strength, compressive strength of insulation performance improvement concrete decreased more than that of Plain but was content with 24 MPa. thermal conductivity of insulation performance improvement concrete tended to decrease. Freezing and thawing resistance of insulation performance improvement concrete was similar to that of Plain. In carbonation resistance test, combination product with calcined diatomite powder showed the result which was similar to that of Plain. In carbonation resistance test, combination product with micro foam cell admixture showed a increase compared to that of Plain and length variation of combination product generally increased.

삼성 조립식 주택 부재 및 공법의 성능향상에 관한 연구

  • 조동우;양관섭;이윤구;장재희;이세현
    • 월간 기계설비
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    • pp.74-84
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    • 1994
  • 본 연구원에서는 삼성건설에서 생산시공되고 있는 조립식주택 부재에 대하여 공업화주택 성능인정 기준과 관련된 항목중 단열, 차음, 내화성능등의 성능을 분석$\cdot$평가하여 PC조립식부재에 대한 기술자료를 마련하고자 하였다. 또한, 기존 조립식주택을 대상으로 주거환경과 직접적인 영향을 미치는 벽체 및 적합부의 단열 및 결로, 공간차음성능, 바닥충격음 차단성능, 급배수설비 소음 성능등에 대한 실물실험 및 현장실측조사를 통해 파악함으로써 조립식주택의 주건환경을 분석$\cdot$평가하였다. 각 항목별 성능에 대한 종합적인 분석결과, PC아파트의 기존의 현장타설 RC아파트는 주거성능 측면에서 별다른 차이를 보이지 않았으며, 단열성능 등 몇가지 요소에서 PC아파트가 상대적으로 우수한 것으로 분석$\cdot$평가되었다.

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