EnergyPlus를 이용한 건물 부위별 목질제품 적용에 따른 건축물 에너지 절감 기여도 평가

서정기 ( Jungki Seo ),위승환 ( Seunghwan Wi ),김수민 ( Sumin Kim ) 한국목재공학회 2016 목재공학 Vol.44 No.5

최근, 전 세계적으로 온실 가스 증가에 따른 기후 변화에 대한 문제가 논의되고 있다. 그중, 건축물에서의 에너지소비량은 전체 에너지 소비량의 40%까지 증가할 것으로 예상된다. 따라서 건축물에서의 에너지 소비량 절감에 대한 노력이 필요한 실정이다. 본 연구에서는, 건물에너지 절감에 효과적으로 기여하는 재료 중 하나인 목재를 이용하여, 목질 제품 구성에 따른 중부지방과 남부지방의 난방에너지 요구량에 대하여 시뮬레이션을 통해 분석하였다. 시뮬레이션 도구는 미국 에너지부(Department of Energy)가 BLAST와 DOE-2의 장점을 결합해 만든 동적 에너지 해석 엔진인 EnergyPlus를 이용하였다. EnergyPlus는 다양한 건물 및 HVAC 시스템 구성요소(Object)에 대한 입력항목(Field)을 가지고 있으며, 특히 건물, 공조시스템, 열원기기 사이의 피드백을 통해 통합된 동시계산을 수행하며, ASHRAE Standard 140-2007 표준에 따라 상용 프로그램 간의 비교를 통해 검증된 프로그램이다. 시뮬레이션을 위한 기상데이터는 EnergyPlus에서 제공하는 IWEC 인천 지역과 광주 지역의 epw 형식 기상데이터를 이용하였다. 대상 모델은 한국농어 촌공사에서 제시한 2012년 농·어촌주택 표준설계도면 중 ‘농림-12-26-가’ 유형을 이용하였으며 총 10개의 실로 구성되어 있다. 시뮬레이션 분석 결과, 중부지방과 남부지방 별 목질 제품의 적용 범위를 실내마감재, 실외마감재, 창호, 목구조로 단계적으로 변경해 지역에 따라 각각 16 Case의 시뮬레이션을 수행한 결과 실내외의 마감재로 목재를 사용한 것만으로도 에너지 성능이 향상된 것을 확인할 수 있었다. Increasing green house gas and it consequent climate change problems are discussed as a global issue. Accordingly, future local green house gas emission will increase up to 40% of the entire local green house gas emission and therefore, efforts to reduce the emission in construction industry is urgently required. Therefore, in this study, heating energy demand was analyzed by using the EnergyPlus simulation according to wood material finishes configuration. EnergyPlus has the entry for a variety of buildings and heating, ventilation, air conditioning (HAVC) system components, in particular buildings, air conditioning systems, and performs simultaneous integrated calculated through the feedback between the heat source unit, a verification program according to the ASHRAE Standard 140-2007 to be. The climate data for the simulation we used the data IWEC in Incheon and Gwangju provided by EnergyPlus. The analysis of simulation model was farm and fishing house standard design drawings: 2012, presented at the Korea Rural Community Corporation. The results of simulation of central region and southern region were effected by wood products of simulation model into the interior finish, exterior finish, windows, wooden structure. Also, it was confirmed that the reduced heating energy demand.

목질 마감재 구성에 따른 주거용 건축물 부위별 열교 및 전열성능 분석

서정기 ( Jungki Seo ),정수광 ( Su-gwang Jeong ),김수민 ( Sumin Kim ) 한국목재공학회 2017 목재공학 Vol.45 No.3

건축물에서 사용되는 에너지를 줄이기 위하여 다양한 연구 및 정책이 진행되고 있으나 건축물에서 구조재 및 실내·외 마감재로 폭넓게 사용되는 목재의 열적 특성에 관한 연구는 미미한 실정이다. 이에 따라, 본 연구는 목질재료와 비 목질재료의 전열성능을 분석하기 위하여 목질재료가 주로 이용되는 주거용 건축물을 대상으로 열성능이 취약한(열교 발생) 부위를 선정하고, 각 부위별로 구조재와 마감재의 구성에 따라 총 16 Case에 대해 전열성능 분석을 실시하였다. 전열 해석 시뮬레이션 도구는 ISO 10211의 계산 방법을 따르는 Physibel Trisco를 이용하였다. 해석 부위의 모델링 역시 ISO 10211에서 제시된 기준에 의해 실시하였으며, 경계 온도 조건은 에너지절약설계기준에 따라 실내온도 20℃, 실외온도 -11.3℃(서울 기준)로 설정하였다. 구조는 콘크리트구조와 비 목질재료마감, 콘크리트구조와 목질재료마감 그리고 목구조에 목질재료마감의 경우에 따라 구분하였다. 부위는 벽체, 지붕, 층간바닥 및 최하층 바닥 등으로 구분하여 시뮬레이션을 진행하였다. 결과로서, 콘크리트구조의 경우 형상적 원인에 의해, 목구조의 경우 형상적인 원인에 재료적 원인이 더해져 다발적으로 열교가 발생함을 확인할 수 있었다. 추가적으로 콘크리트구조에서는 단열재의 불연속 부위에서 구조적인 열교가 발생하고 목구조에서는 구조적인 열교와 이질재료의 적용 부위에서 재료적 원인에 의한 열교가 발생하는 것을 확인할 수 있었다. 또한 콘크리트 구조에 목질 실내마감재를 적용하였을 경우에는 벽체의 선형 열관류율 값이 감소하는 것을 확인할 수 있었다. Many researches and policies have been carried out for saving energy in buildings. However, there are a few studies of thermal characteristics of wood-based materials that have been widely used as structural materials and finishing materials in buildings. In this study, thermal bridging areas were found to investigate thermal performance of residential building using non wood-based materials and wood-based materials. And heat transfer analysis of 16 case studies according to composition of structural materials and finishing materials was conducted. Also in this experiment, Physibel Trisco was used as the heat transfer analysis simulation tool, which conforms to the calculation method of ISO 10211. Analytical modeling was also carried out according to the ISO 10211, and the boundary temperature conditions were set at room temperature 20℃ and outdoor temperature -11.3℃ (Seoul standard) according to the energy saving design standard in South Korea. Applied structures are classified according to the cases of concrete structure with non wood-based finishing materials, concrete structure with wood-based finishing materials and wood structure. Analyzed building elements were divided into a wall, a roof, an interlayer floor and a bottom floor. As a result, it can be confirmed that the thermal bridge of the concrete structure and wood structure were caused by the geometrical and material causes. In addition, the structural thermal bridge was caused in the discontinuity of the insulation in the concrete structure. Also it was confirmed that the linear heat transfer coefficient of the wall decreases when the wood-based materials are applied to the concrete structure.

탄소나노재료를 이용한 목질마루 시공용 접착제의 열전도율 개선

서정기(Seo Jungki),김수민(Kim Sumin) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)

A flooring heating system is being used for the main method nationally, but the problem of the low thermal conductivity of the wood has come up with increasing the use of the wood floor finishing. Therefore, in order to improve the thermal conductivity of the floor system, xGnP (exfoliated graphite) is added into the epoxy resin used for constructing the floor finishing material in this research. After stirring the constructing resin with 0%, 1%, 2%, 3% of xGnP for 10 minutes, same size of samples were prepared and conducted to the thermal conductivity test and Single lap shear test to figure out change of the bond strength. As a result of the test, the thermal conductivity of the resin and the bond strength were increased, but the elongation was decreased.

학교폭력의 교육적 대안

서정기(Jungki Seo) 한국배움학회 2012 배움학 연구 Vol.4 No.1

교육 공동체로서 학교는 학생들의 바른 인격적 성장을 위한 공간이다. 학교는 학생들의 부적응 및 문제행동을 선도하고, 교육하는 책임을 가진다. 이를 위한 학교의 생활교육은 응보적(retributive) 패러다임에 입각해 이루어져 왔다. 그러나 이러한 처벌 중심의 생활교육이 교육문제의 실제적인 개선과 교육적 효과를 가지고 오지 못하고 처벌을 둘러싼 학교 구성원들의 갈등이 심화되면서 새로운 대안이 요구된다. 이에 잘못에 대해 상응하는 처벌을 부여하는 것에 초점을 둔 응보적 정의에 입각한 생활교육 대신에 공동체 구성원과 당사자가 함께 참여해 잘못으로 인한 폐해를 바로잡고 공동체와 개인의 피해회복에 초점을 두는 회복적 패러다임에 입각한 생활교육이 실천되고 있다. 이는 당사자의 참여를 통한 피해회복과 이를 위한 구체적 노력을 중시한다. 이러한 회복적 생활교육은 학생의 참여를 통해 자신의 잘못을 깨닫고 책임을 배우는 기회를 제공한다. 그리고 이러한 회복적 생활교육의 실천은 관리와 통제를 넘어 학생들 스스로가 자기훈육(self-discipline)의 능력을 가지는 배움의 기회를 제공할 것이다. Schools, as a learning community are supposed to be a place for educational growth of students. So, it is responsible of education for self-discipline that make them understand their wrong doings and behaviors and help make those right. Retributive way of discipline has been applied to for it. However, retributive disciplining of the matter that concludes a case through punishment does not meet the students' educational needs, and neither achieves the educational goal to support normal school life among students. It rather makes conflict worse among school members. Schools should not only resolve conflicts but also correct students' problem behaviors, and build safe educational environments through educational growth and development. For this, paradigm of discipline needs to be changed from retributive approach which focus on giving right punishment to restorative way which focus on making harms made by wrongdoings right. It will help for students face their own wrongdoing and understand responsibility of it, instead of blaming to authority and punishment given to them. In addition, it also will prepare more learning opportunities for self-discipline.

건축물 에너지 시뮬레이션 적용을 위한 목재 열전도율 데이터베이스 구축

서정기(Jungki Seo),강유진(Yujin Kang),김수민(Sumin Kim) 한국가구학회 2016 한국가구학회지 Vol.27 No.2

The increasing interest in the environment and climate change around the globe, while the importance of building energy saving is increasing. The building energy simulation program is used for evaluating of energy performance of buildings. However, an input value of wood thermal conductivity in the programs is different from each other. Therefore, in this study, wood thermal conductivity was measured according to species. Through construction database by species of wood, the error of simulation program are able be decreased. In addition, if used as a structural and interior of buildings, the thermal conductivity and moisture of the wood is difficult to apply to the program because they were changed according to the occupant’s lifestyle. In this paper, thermal conductivity and moisture content.of wood confirmed changes in the constant temperature and relative humidity (25°C, 50% R.H.) condition.

목질마루바닥재와 벽체용 재료를 이용한 평판열류계법과 MTPS (Modified Transient Plane Source)법의 열전도율 상관관계 분석

차정훈(Junghoon Cha),서정기(Jungki Seo),김수민(Sumin Kim) 한국가구학회 2011 한국가구학회지 Vol.22 No.2

These days global warming is the most important problem and the most important factor is high emission of carbon dioxide. The 23% of carbon dioxide emission for building construction must be reduced. Thermal conductivity is the most basic factor that can decrease the energy consumption especially insulation. Therefore, an accurate and continuous thermal conductivity measurement can be a way to save energy. In this paper, there are methods about how to investigate thermal conductivity measurements and comparing two methods which are the Heat Flow Meter 436 and TCi.

Click Profile형태, 결합강도와 국제특허를 중심으로 분석한 클릭형 강화마루의 특성

박윤(Yoon Park),서정기(Jungki Seo),김수민(Sumin Kim) 한국가구학회 2009 한국가구학회지 Vol.20 No.2

The objective of this work was to research click profile of laminate flooring by comparison of click and bonding laminate floorings, especially base on the click profile shape, bonding strength and international patents. Non-glue locking system has been used since laminate flooring was developed. For the reason of environment and saving installation time, the manufacturer in Europe and USA has developed click profile for laminate flooring. Each manufacturer has patent on each click profile. Although each click profile has good lock strength as shape, Berryand Unilin company’s click profile systems showed higher locking strength than others. Korean laminate flooring company pay the fee of patent for using European and American manufacturer’s click profile. From this work, we grope Korean style laminate flooring and click profile through research on the click profile shape, bonding strength and patents of European and American manufacturers.

주거건물의 에너지저감 축열재료 적용을 위한 xGnP가 혼합된 Composite PCM 개발 연구

전지수(Jeon Jisoo),서정기(Seo Jungki),정수광(Jeong Su-Gwang),김수민(Kim Sumin) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.3

Energy consumption for thermal comfort in buildings has grown a lot in few years because of increasing users demand for comfort conditions and the associated market penetration of more heating systems. In Korea, radiant floor heating system has been used in residential buildings traditionally. This type of residential buildings consume approximately 55% of the total residential building energy consumption in heating. Therefore, any decrease in heating energy consumption will significantly reduced total residential building energy consumption. Thermal energy storage is a useful tool for improving energy efficiency and increasing energy savings. In latent heat thermal energy storage systems, energy is stored during melting and recovered during freezing of a phase change material. In latent heat thermal energy storage systems (LHTES), energy is stored during melting and recovered during freezing of a phase change material (PCM). This study aimed to prepare the composite PCMs with low mass fraction of exfoliated graphite nanoplatelets (xGnP) to obtain applicable PCMs as building materials and to investigate the effect of xGnP addition on thermal conductivity, melting temperature and latent heat capacity of PCMs, in order to satisfy thermal comfort of residential building using radiant floor heating system with energy conservation.

HFM, LFA와 TCi를 이용한 건축 재료의 열전도율 측정과 상관관계 분석

차정훈(Cha Junghoon),서정기(Seo Jungki),김수민(Kim Sumin) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4

Nowdays the most critical problem is global warming and the most important reason is the high emition of carbondioxide. 23% of the use of carbondioxide is used in building and decreasing the use of it is very important. One of the biggest factor that can decrease the use of energy is developing the heat conducting ratio of the materials we use in building. Heat conducting ratio is the important factor in the use of reducing energy comsumation. In this research, there are methods about how to measure the heat conducting ratio, and the existing the representing measuring method which is Heat Flow Meter HFM 436, Laser Flash Analysis and find out about the TCi of the new method C-Therm and compare the results.

개질 그라파이트를 적용한 HDF의 열전도율 향상

박윤(Park Yoon),서정기(Seo Jungki),김수민(Kim Sumin) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)

The purpose of this study was to improve the thermal conductivity in floor base material (HDF, High Density Fiberboard). By adding 0.5~ 4% graphite into the HDF, we can improve the thermal conductivity but the internal bond of the HDF was reduced up to 50% in relation to the quantity of graphite added. And to improve IB(Internal Bonding), we have tried to increase resin content and press time but there were no improvement. But increasing melamine content from 12% to 20%, we have noticed that the IB has improved to the required level. Since graphite is reducing IB and making the HDF color darker, it is practical to reduce the graphite down to 0.5% and increasing melamine up to 20% to get 8.3% improvement on thermal conductivity.