• Title/Summary/Keyword: Thermal insulation performance

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The study of in-situ measurement method for wall thermal performance diagnosis of existing apartment (기존 공동 주택의 벽체 열성능 현장 측정법에 관한 연구)

  • Kim, Seohoon;Kim, Jonghun;Yoo, Seunghwan;Jeong, Hakgeun;Song, Kyoodong
    • KIEAE Journal
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    • v.16 no.4
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    • pp.71-77
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    • 2016
  • Purpose : The energy saving in a residential building (apartment) sector is known as one of the effective solution of energy reduction. In South Korea, the government has recently reinforced regulations associated with the energy performance of buildings. However, there is a lack of research on the methods for the energy performance diagnosis that is used to analyze the wall thermal performance of the existing apartments. Because a reliable diagnosis is necessary to save the building energy, this study analyzed wall thermal performance of an existing apartment in Seoul. Method : This paper applied two methods for analysis of the thermal insulation performance; HFM(Heat Flow Meter) method and ASTR(Air-Surface Temperature Ratio) method. The HFM method is suggested by ISO9869-1 code to measure the thermal performance. The ASTR method is proposed by this study for the simplified In-situ measurement and it uses three temperature data (interior wall surface, interior and exterior air) and the overall heat transfer coefficient. This study conducted the experiment of an existing apartment in Seoul using these methods and analyzed the results. Furthermore, the energy simulation tool of the building was used to suggest retrofit of the building based on the results of measurements. Result : The error rate of HFM method and ASTR method was analyzed in about 17 to 20%. As the results of comparison between the initial design values of the wall and the measured values, the 26% degradation of insulation thermal performance was measured. Lastly, the energy simulation tool of the building shows 10.8% energy savings in accordance with the construction of suggested retrofit.

A Study on the Evaluation of Building Energy Rating considering the Insulation Performance of the Building Envelope (외피 열성능에 따른 건물에너지효율등급 분석 연구)

  • Kim, Chi-Hoon;Ahn, Byung-Lip;Kim, Ji-Yeon;Jang, Cheol-Yong
    • Journal of the Korean Solar Energy Society
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    • v.29 no.5
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    • pp.59-64
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    • 2009
  • According to the building regulation U-value limitation of window is $3.3W/m^2{\cdot}K$ in southern regions, while U-value limitation of wall is $0.35{\sim}0.58W/m^2{\cdot}K$. It means that the energy loss through windows is five times more than it through wall. Therefore, this study analyze how much it has affected building energy rating when the insulation performance of windows and walls is changed by building regulation. In conclusion, in order to obtain 2 rating thermal performance of windows is improved more than 10 percent of U-value limitation and it of wall is improved more than 20 percent. The thermal performance of windows is improved more than 20 percent of U-value limitation and it of wall is improved more than 30 percent to receive 1 rating.

A Study on the Evaluation of Building Energy Rating considering the Insulation Performance of the Window and Wall in Apartment Houses (창호 및 벽체의 단열성능에 따른 건물에너지효율등급 평가 연구 -공동주택을 중심으로-)

  • Kim, Chi-Hoon;Ahn, Byung-Lip;Kim, Ji-Yeun;Jang, Cheol-Yong
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.608-613
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    • 2009
  • According to the building regulation U-value limitation of window is $3.3W/m^2{\cdot}K$ in southern regions, while U-value limitation of wall is $0.35{\sim}0.58W/m^2{\cdot}K$. It means that the energy loss through windows is five times more than it through wall. Therefore, this study analyze how much it has affected building energy rating when the insulation performance of windows and walls is changed by building regulation. In conclusion, in order to obtain 2 rating thermal performance of windows is improved more than 10 percent of U-value limitation and it of wall is improved more than 20 percent. The thermal performance of windows is improved more than 20 percent of U-value limitation and it of wall is improved more than 30 percent to receive 1 rating.

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Characteristics of Low Density Fiberboards for Insulation Material with Different Adhesives (I) - Thermal Insulation Performance and Physical Properties - (다양한 접착제로 제조한 단열재용 저밀도섬유판의 특성(I) - 단열성능 및 물리적 성질 -)

  • Jang, Jae-Hyuk;Lee, Min;Kang, Eun-Chang;Lee, Sang-Min
    • Journal of the Korean Wood Science and Technology
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    • v.45 no.3
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    • pp.360-367
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    • 2017
  • This study was carried out to compare the characteristics of low density fiberboards (LDFs) manufactured with different adhesive types such as melamine urea formaldehyde (MUF), phenol formalehyde (PF), emulsified MDI (eMDI) and latexes resins. As results, hard LDFs were successfully manufactured by MUF, PF and eMDI resins. Thermal conductivities of all LDFs were significantly lower than commercial medium density fiberboard. Especially, all LDFs showed comparable thermal insulation performance with extruded polystyrene foam (XPS). LDF manufactured with eMDI resins showed the highest physical properties such as thickness/length swelling by water absorption and bending strength.

Development of Firefighters' Personal Protective Clothing with Nomex Honeycomb Fabric and its Protective and Comfort Evaluation (노멕스 허니콤 구조 직물을 적용한 소방관용 특수방화복 개발 및 이의 보호 쾌적 성능평가)

  • Jung, Jae-Yeon;Ku, Ponjun;Kim, Do Hyung;Kwon, Min-Jae;Kang, Sungwook;Choi, Jeong-Yoon;Lee, Joo-Young
    • Fashion & Textile Research Journal
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    • v.21 no.5
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    • pp.606-617
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    • 2019
  • The present study newly developed a firefighters' protective jacket and pants using a Nomex honeycomb structured layer (HPC) in cases of being exposed to flashover or flameover. This study evaluated the protective and comfort functions of an HPC compared to the current KFI firefighters' protective clothing (FPC). The results are as follows. First, thermal protective performance (TPP) of fabric layers was 2.75 times greater for HPC than FPC at $125kW/m^2$. Second, the predicted second and third degree burn areas were smaller for HPC than FPC when using a flame manikin. Third, thermal insulation using a thermal manikin was 0.2 clo greater for HPC than FPC. Fourth, there were no marked differences in maximal performance, mobility, and microclimate temperature/humidity between FPC and HPC through human wear trials. The thermal insulation of HPC was higher than that of FPC; however, any negative effect of HPC thermal insulation on the comfort functions for firefighters was not found. In conclusion, the newly-developed HPC provided more protection in reducing burn injuries from $125kW/m^2$, while no negative impact on maximal performance, mobility and thermal comfort functions of firefighters, which is appropriate for quick-evasive tactics at the flashover, flameover or back draft fires.

A Study on the Evaluation for Energy Characteristic of Absorber Floor Insulation of Apartment House (공동주택 층간단열 완충재의 열에너지 특성의 관한 연구)

  • Choi, Dong-Hyuk;Choi, Gyoung-Seok;Kang, Jae-Sik;Lee, Seung-Eon;Cho, Woo-Jin
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.712-717
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    • 2009
  • Ondol is a tradtional Korea heating system with a long history. The ondol heating system is a default in ordinary houses and high-rise apartment alike. But Intensified Architecture Law insulation standard can't satisfied standard insulation only light weight concrete in ondol. The between light weight concrete and slab apply EPS insulation is construct for generate a method of construction. The standard insulation for floor heating system is responsible but complicate construction thermal transmittance and absorber, deteriorate the cost and decreasing the performance insulation & impact floor sound. In study on the evaluation decrease heating-load of floor construction of the insulation & absorber that improvement floor a Apartment house.

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Temperature on structural steelworks insulated by inorganic intumescent coating

  • Choi, J. Yoon;Choi, Sengkwan
    • Steel and Composite Structures
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    • v.15 no.1
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    • pp.1-14
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    • 2013
  • Predicting the fire resistance of structures has been significantly advanced by full scale fire tests in conjunction with improved understanding of compartmental fire. Despite the progress, application of insulation is still required to parts of structural steelwork to achieve over 60 minutes of fire rating. It is now recognised that uncertainties on insulation properties hinder adaptation of performance based designs for different types of structures. Intumescent coating has recently appeared to be one of most popular insulation types for steel structures, but its design method remains to be confirmed by empirical data, as technical difficulties on the determination of the material properties at elevated temperatures exist. These need to take into account of further physiochemical transitions such as moving boundary and endothermic reaction. The impetus for this research is to investigate the applicability of the conventional differential equation solution which examines the temperature rise on coated steel members by an inorganic intumescent coating, provided that the temperature-dependent thermal/mechanical insulation properties are experimentally defined in lab scale tests.

Evaluation of Thermal Insulation Properties of Covering Materials to Protect Peach Trunks against Freezing Injury (복숭아 주간부 동해 예방을 위한 피복재의 보온성 평가)

  • Shin, Hyunsuk;Yun, Seok Kyu;Choi, In Myung;Kim, Sung Jong;Yun, Ik Koo;Nam, Eun Young;Kwon, Jung Hyun
    • Journal of Bio-Environment Control
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    • v.25 no.4
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    • pp.288-293
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    • 2016
  • The study was performed to evaluate thermal insulation covering materials (TICMs) to protect peach trunks against freezing temperatures in winter season by investigating thermo-physical properties and practical thermal insulation effect of the TICMs which was made of white non-woven fabrics, yellow paper sheets, and waterproof fabric pads. Among the three TICMs, Waterproof fabric pad (double layer) possessed the best performance about thermal insulation rate and thermal resistance among three kinds of TICMs. Day thermal insulation effects of waterproof fabric pad, which prevent from temperature rise on the bark tissues of trunks during the day time, were $14.09^{\circ}C$. Night thermal insulation effects of them, which prevent from temperature decline on the bark tissues of trunks at night time, were $7.23^{\circ}C$. Waterproof fabric pad showed the highest day and night thermal insulation effects. Thus our results suggest that development of TICMs using waterproof fabric pad might be helpful to protect the bark tissues of trunks from freezing injury.

Study on the Field Application of Insulation Performance Improvement Concrete (단열성능 향상 콘크리트의 현장 적용성 평가에 관한 연구)

  • Kang, Sung-Hyuk;Kim, Jung-Ho;Choo, Kyoung-Nam;Park, Young-Shin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.11a
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    • pp.17-18
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    • 2014
  • Recently, climate change have increased consumption of building heating and cooling energy. Therefore, various actions to reduce greenhouse gas and energy consumption have been prepared by world developed countries. The energy consumption by buildings approximately reaches 25% of total korea energy consumption. The greatest part in the buildings of the energy consumption is building facade. Especially the outer covering of the building has been made of concrete more than 70%. But a few research projects on concrete comprising more than 70% of outsider of buildings has been tried. This research is structural insulation concrete what improved insulation performance using Micro Form Admixture and Calcined Diatomite Powder and Lightweight Aggregate.

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Deflection Characteristics of Permanent Formwork Using Multi-layer Insulation (다층형 단열재를 사용한 영구거푸집의 처짐 특성)

  • Ryu, Hwa-Sung;Shin, Sang-Heon;Song, Sung-Yong;Kim, Deuck Mo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.11a
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    • pp.130-131
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    • 2019
  • As part of recent low-energy policies, thermal insulation standards for buildings are being tightened every year. In addition, the conventional styrofoam insulating material has a problem that the thickness of the heat insulating material to achieve a standard heat permeability is rapidly increased. Due to the thick insulation, there is a high risk of spreading vulnerable structures such as fire due to lack of space between buildings. On the other hand, the method of using the insulation as a formwork is known to be excellent cost saving effect through the reduction of the formwork usage and the simplification of the external insulation work. In order to solve this problem, this study aims to fabricate a multi-layered insulator that combines high-performance phenolic foam insulation and styrofoam insulation and evaluate the deflection characteristics for use as formwork.

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