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제로에너지빌딩 구현을 위한 발포 플라스틱 폼 단열재의 난연성에 관한 실험 연구
강재식(Kang Jae Sik),최경석(Choi Kyung Suk),최현중(Choi Hyun Jung),배민정(Bae Min Jung) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
This study was carried out to investigate flammability by self - extinguishing ability and flame retardancy by cone calorimeter test on foam plastic foam insulation (EPS, XPS, PUR, PF). The purpose of this study is to investigate insulation materials suitable for zero energy buildings. 1) As a result of horizontal and vertical combustion test by KS M ISO 9772 and UL 94 test method, horizontal burn ability showed low discriminative power and vertical burnability was found to be different according to the self - extinguishing and flammability characteristics of insulation. Therefore, it is considered that the test standard for the current horizontal flammability needs to be improved and improved. 2) Cone calorimeter test for EPS, XPS, PUR, PF insulation shows that the current self-extinguishing organic insulation is less than the performance of all samples tested. Even in the case of EPS core sandwich panels, the flame retardancy of the core EPS was inadequate in the entire sample. Therefore, it is very inadequate to evaluate the flame retardancy of the composite system with the total calorific value of the composite system without evaluating the flame retardancy of the core material in a large number of various composite materials and composite insulation systems, which are recently known to satisfy the semi-fire. It is very urgent to improve the systematic supplementation and management of the test report. 3) In the case of recently developed flame retardant EPS, the heat insulation performance was confirmed to be the flame retardant material or semi-fireproof material performance at the level satisfying the thermal conductivity performance of the foamed polystyrene insulation material of KS M 3808 bead method. Therefore, it can be used as an alternative technology to meet both energy performance and fire safety performance in the future zero energy architecture implementation.
[미발표] 전동차용 8mH급 철심형 필터리액터의 설계제작 및 특성평가
강재식(Jaesik Kang),이창영(Changyoung Lee),조정민(Jeongmin Jo),이진호(Jinho Lee),정현승(Hyunseung Jeong) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5
본 논문에서는 VVVF 추진 DC 전동차에 공급되는 전원의 품질 향상을 위하여 추진제어장치의 입력단에 설치되는 필터리액터의 경량화를 위한 설계제작 및 특성평가를 수행하였다. 기존에 사용되는 공심형 필터리액터를 대체하여 철심형 필터리액터에 대한 연구를 진행하였다. 요구 사항에 알맞은 구조 및 형상과 성능 조건을 만족하는 필터리액터를 설계하기 위해 유한요소해석 기법을 이용한 전자상 해석과 열 해석을 동시에 진행하였다. 또한 해석에 의한 설계 결과를 검증하기 위해 시작품을 제작하였고, 제시된 필터리액터의 요구 사양에 따른 성능시험을 실시하였다. 자연냉각 조건에서 8.0mH, 정격 DC 450A, DC 1500V를 만족하고, 절연열화시험과 온도상승시험을 진행하여 요구 사양을 만족시켰다. 따라서 510kg의 중량을 갖는 기존 공심형 필터리액터에서 19.6%가 감소된 약 410kg수준에서 제작이 가능하였다. In this paper, design and characteristic evaluation of the filter reactor (FL), which is installed on railway vehicle propulsion control system to maintain the improved power supply, was performed for weight reduction of VVVF DC railway vehicles. Iron-core type filter reactor was replaced a conventional air-core type filter reactor with in this research. In order to design the iron-core FL in a clear structure and proper conditions, the electromagnetic and thermal analysis was progressed by using finite element method (FEM). A prototype was fabricated to verify the result of the design, and some experiments were carried out with respect to certain conditions. With an air-cooled condition, the specifications were satisfied in the conditions of 8mH±10%, rated DC 450A, DC 1500V, and insulating degradation, temperature characteristics as well. As a result, it is possible to fabricate the iron-core type FL with about 410kg weight 19.6% lighter than the conventional air-core FL, which weighs 510kg.
재활용 폐지를 이용한 친환경 발포 단열재의 열물성 특성
강재식(Kang Jae-Sik),최경석(Choi Gyeong-Seok),정영선(Jeong Yeong-Seon),이승언(Lee Seung-Eon) 한국건축친환경설비학회 2007 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-
The main ingredients of the foam insulator, suggested in this study, are cellulose and starch. Cellulose comes from recycled paper, and starch is natural. Unlike other insulators, the foam is made according to the steam foaming technique which does not use foam gas. Accordingly, this foam insulator has little environmental load occurring in the production process, and is environmentally friendly from product distribution to scrapping. Foamed products show a vertical texture, but most cells are close types. It is low in absorptiveness, and high in moisture permeation resistance, i.e. 0.07 g/m3 hr ㎜Hg. This foam insulator can be easily processed at a density of 20 ㎏/m3~ 30 ㎏/m3, and the thermal conductivity at this time was 0.034 W/mK ~ 0.037 W/mK. Its tensile strength, compressive strength and absorptiveness are the same as those of existing plastic foam insulators. The greatest feature of this foam insulator is that it uses recycled paper as one of its main ingredients, and the excellent economy of recycling is its advantage.
제로에너지건물 구현을 위한 단열 파스너의 열 특성 및 실증에 관한 연구
강재식(Jae-Sik Kang),이호열(Ho-yeol Lee),최경석(Gyeong-Seok Choi),최현중(Hyun-Jung Choi) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Internal insulation systems are applied to the most buildings in Korea. However, due to the importance of building energy enhanced the interest of the external insulation systems. The external insulation systems have better thermal performance because the heat bridges through the structure are rarely formed. But heat bridges through the connectors and anchors between structure and external insulation decrease heat performance of the envelope system. In this paper, mock-up test and simulation was conducted. Heat Bridge-free Fastener was installed between two chambers of which indoor temperature was controlled. Heat Bridge-free Fastener reduced heat flow through the fastener.
강재식(Kang, Jae-Sik),최경석(Choi, Gyeong-Seok),최현중(Choi, Hyun-Jung) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
A Hanok is very weak to thermal insulation and airtightness because the main components, walls, floors, roofs, windows consist different materials and these parts are connected without insulation. In therms of energy efficiency, Hanok is vulnerable to insulation, airtightness, thermal bridge and condensation. This study aims to analysis of existing Hanok and new Hanok according to performance of thermal insulation, airtightness, condensation and energy. In order to provide a comfortable and healthy living environment with Hanok require the convergence of the energy, new technology, new materials and new method. The results of thermal Insulation and airtightness performance for new Hanok can significantly contribute to the improvement in energy efficiency maximization and well-being of Hanok.
강재식(Kang, Jae-Sik),배민정(Bae, Min-Jung),안호상(Ahn, Ho-Sang) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.2
This study conducted field-centered empirical tests on new technologies for fire/disaster evacuation facilities that use balcony railings, evaluated structural safety and weather resistance, and conducted simulations to predict evacuation safety when applied to various buildings. As a result of field experiments and simulations, it was found that in the case of an apartment complex, one person could be evacuated in about 20 seconds, a family of 4 could be evacuated in about 45 seconds, and in the case of an office, it was possible to evacuate 26 people in 35 seconds.