선박오염방지에 관한 국내법률 제정안 제시

권영철,백철호,유영종,이찬재,Kwon, Young-Cheol,Baik, Cheol-Ho,Yoo, Young-Jong,Lee, Chan-Jae 선박안전기술공단 2010 선박안전 Vol.29 No.-

IMO에서는 MEPC58차, 59차 회기에서 선박평형수, 온실가스, 선박재활용 등 약 20종의 의제가 논의되었으며 이들 중에서 시급성을 요하는 NOx, SOx 강화기준, 유조선간 유류이송, IOPP증서 및 기름기록부의 양식변경 등에 관한 MARPOL 부속서6 및 1의 결의사항에 대하여 국내의 해양환경법에도 국제협약의 개정사항을 수용해야 한다. 또한, 정부에서는 현행의 해양 환경관리법에서 선박오염방지에 관한 법률을 분리제정하려는 동향이 있는 바 정부시책에 동참하는 선상에서 국제협약의 개정사항을 반영한 선박해양오염방지에 관한 법률 제정안을 선박검사 기관의 입장에서 제시한다.

고성능 진공단열재의 건축적인 적용에 관한 연구

권영철,김석,Kwon, Young Cheol,Kim, Suk 한국토지주택공사 토지주택연구원 2019 LHI journal of land, housing, and urban affairs Vol.10 No.3

현존하는 단열재 중 가장 열전도율이 낮은 진공단열재(VIP; Vacuum Insulation Panel)는 특수한 재질의 외피재(Envelope)와 외피재 내부의 심재(Core Material), 그리고 단열재 내부의 공기를 흡착하는 흡착제(Getter)로 구성되어 있고, 단열성능을 극대화하기 위해 내부를 진공처리한 제품이다. 진공단열재의 외피재는 알루미늄 박막 필름이 주로 사용되며, 진공단열재의 수명 및 신뢰성을 결정하는 중요한 소재이다. 본 연구를 통하여 불연성이 확보된 Fiber Glass 심재 진공단열재의 방화성능 및 단열성능 확인과 함께 건축적인 적용가능성을 검토하였으며 그 내용을 정리하면 다음과 같다. 1) 20mm 두께의 Fiber Glass 심재 진공단열재의 열전도율이 0.00177W/m·K로, 두께 20mm로 지역별, 부위별 강화된 단열기준을 모두 충족할 수 있음을 알 수 있었다. 2) 진공단열재에 대한 불연성능시험과 가스유해성시험 결과, 불연재료로 적합한 것으로 나타났다. 3) 불연 진공단열재의 장기내구성 시험결과, 25년이 지나더라도 스치로폼 및 유리섬유에 비해 10배 이상의 단열성능을 유지할 수 있음을 알 수 있었다. 4) 건물의 외벽 열관류율 0.12W/㎡K 이하를 만족하기 위해, 준불연성능이 확보된 단열재인 "가"등급의 비드법 보온판 2종 4호와 페놀폼을 사용한다면 각각 280mm, 170mm 이상을 써야하지만, 불연 진공단열재는 20mm 두께로 동일 단열기준을 만족할 수 있는 것으로 나타났다.5) 고성능 진공단열재는 열관류율 0.12W/㎡K 이하를 기준으로 가격경쟁력이 페놀폼 대비 약 1,500원/㎡ 뛰어난 것으로 나타났다. Vacuum Insulation Panel(VIP) has the lowest thermal conductivity among present insulations. It is composed of envelope, core material and getter. Aluminum film is usually used as the envelope of VIP, and it is important component to decide the useful life of VIP. In this research, the thermophysical properties of incombustible fiber glass core VIP were investigated with the possibility of its architectural applications. The results of this research can be summarized as follows: 1) The thermal conductivity of 20mm-thick fiber glass core VIP is resulted as 0.00177W/m·K, which means that 20mm-thick VIP can meet all the reinforced insulation guideline and it can be used in any envelope of any region in Korea. 2) As a result of the test of incombustion and gas toxicity, fiber glass core VIP was suitable for incombustible material. 3) As the test result for the long term thermal conductivity, fiber glass core VIP was found out that it would keep above 10 times insulating performance than polystyrene foam and glass fiber. 4) To meet the thermal transmittance of 0.12W/㎡K, limited-combustible insulation of expanded polystyrene foam and phenolic foam should be used respectively as thick as above 280mm and 170mm, incombustible VIP can meet the same insulation level with 20mm thickness. 5) The price competitiveness of incombustible VIP to meet the thermal transmittance of 0.12W/㎡·K was about 1,500won/㎡ higher than that of phenolic foam.

GPS를 이용한 서울-제천 지역의 대류층 천정 지연 평가

권영철,한욱,박필호,Kwon, Young-Cheol,Han, Uk,Park, Pil-Ho 한국지구과학회 2000 韓國地球科學會誌 Vol.21 No.4

이 연구는 GPS를 이용한 서울-제천지역에 대한 대류층 천정 지연 분석에 관한 것이다. 다양한 기상조건하에서 정확도를 보장하는 GPS 측위를 위하여 대류층 천정 지연과 GPS 정밀도와의 연관성을 분석하였다. Bernese 4.0소프트웨어로 산출한 대류층 천정 지연값의 증가시 GPS 측위 오차도 증가하였다. 대류층에 의한 오차는 평균 20 cm 였으며, 보정 모델 사용시 모두 5cm 범위내로 줄일 수 있었으며, 보정 모델 간에는 차이가 거의 없었다. GPS 측위오차와 대류층 천정 지연의 상관관계를 밝힘으로써 전선의 이동상황을 모니터링할 수 있으며 이는 GPS 기준망의 확장으로 가능할 것이다. The estimation of tropospheric zenith delay over the Seoul-Jecheon area using GPS is presented. Over the past ten years, the world-wide industrial nations have been intensively concerned over increasing GPS surveyings in the various fields of earth science. To preserve precise positioning under various weather conditions, relationships between tropospheric zenith delay and GPS accuracy are analyzed. GPS accuracies are compared with tropospheric zenith delay produced by Bernese 4.0 software. Errors of tropospheric delay are 20cm in mean and reduced up to 5cm when tropospheric correction models are used. Correlation between error of GPS and tropospheric zenith delay plays a positive role to monitor the migration of weather front in the established Korean GPS network.

반사형 단열재의 표면방사율에 따른 중공층의 열저항에 관한 연구

권영철(Kwon, Young-Cheol),주진갑(Joo, Jin-Gap),조희석(Jo, Hui-Seok),복진선(Bok, Jin-Seon),박창석(Park, Chang-Seok) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.2

Reflective insulation systems are fabricated from aluminum foils with a variety of backings, such as kraft paper, plastic film, polyethylene bubbles, or cardboard. Emittance (or emissivity) refers to the ability of a material’ surface to emit radiant energy. All materials have emissivities ranging from zero to one. The lower the emittance of a material, the lower the heat (infra-red radiant energy) radiated from its surface. Aluminum foil has a very low emittance, which explains its use in reflective insulation and radiant barriers. This study indicates the thermal resistance of the reflective air space in "building energy saving guideline" should be changed to reflect its realistic value which is 3 times higher that in the guideline. The surface emittance of reflective insulation should also be under 0.05, which is examined by authorized organizations or laboratories and checked by construction supervisors.

해수용 열교환기의 코팅 부식특성 실험연구

권영철(Kwon, Young-Chul),김기영(Kim, Ki-Young),허철(Huh, Cheol),조맹익(Cho, Meang-Ik),권정태(Kwon, Jeong-Tae) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.9

본 연구에서는 해수용 열교환기의 코팅에 따른 해수 부식특성을 조사하기 위해 실험이 수행되었다. 코팅은 테플론, 전착, 세라믹+실리콘 3종을 선정하였고, 코팅되지 않은 알루미늄 부식과 비교하였다. 해수부식을 가속시키기 위하여 70℃ 고온의 농도 3.5% 인공해수를 제작하여 9주 동안 침지부식을 시켰다. 침지기간에 따른 코팅의 부식특성 변화를 관찰하기 위하여 임피던스 분광법과 SEM을 이용하였다. Bode 선도에서 얻어진 분극저항으로부터 코팅재질의 내부식성을 확인하였다. 이중코팅은 4주 이후에도 코팅의 내부식성을 유지하였다. 또한 침지기간에 따라서 금속모재 와 점착된 코팅면 사이에 블리스터가 발생할 수 있음을 확인하였다. In the present study, coating corrosion characteristics of the heat exchanger for sea water are experimentally investigated. Coating types by a teflon, an electrodeposition and a ceramic+silicon were tested and compared with the corrosion characteristics of an aluminum. For the acceleration of corrosion by sea water, the temperature of sea water 70℃ and the concentration of salt 3.5% were considered. And the specimens were immersed in sea water during 9 weeks. Coating corrosion characteristics were measured by using the impedance method and SEM. Experimental results showed that polarization resistances obtained from Bode plot were related to the corrosion resistance of coating types, and the corrosion resistance of double coating were maintained during 4 weeks. From SEM photograph, we saw that blisters was generated on the interface between metal and coating.

준불연 저방사 복합 단열재 개발에 관한 연구

권영철(Kwon, Young-Cheol),박민수(Park, Min-Su) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.6

Non-combustible Low-Emissivity Hybrid Insulation has enclosed reflective air spaces between aluminum foils which have very low emissivity. The reflective air spaces are composed of optimum-sized air cells which are enclosed by fire-retarding polyethylene foam. The critical difference between Low-Emissivity Hybrid Insulation and conventional reflective insulations is the presence of a honey-comb structure formed from polyethylene that serves as the core material. Low-Emissivity Hybrid Insulation has foil surface emissivity of 0.03 with enclosed air cells between foils. Its core material is 35 times foamed fire-retarding polyethylene foam which is expanded to make air cells. The enclosed air cells with foil reduce convective and radiative heat transfer. To verify the high efficiency of Non-combustible Low-Emissivity Hybrid Insulation, it has been tested by an accredited laboratory designated by the Korean government. The purpose of this paper is to provide insulation design to meet the reinforced building insulation and fire safety standards. The result of this paper also presents non-combustible insulations which can be used as exterior insulations for the buildings above 6 stories. Non-combustible Glass wool 48K, Mineral wool, Phenol Foam and Low-Emissivity Hybrid Insulation for the exterior wall of apartment buildings in central region can be used as thick as 155mm, 180mm, 90mm and 100mm, respectively.

Low-E 단열재 적용에 따른 단열두께 절감 효과 분석

권영철(Kwon Young-Cheol),이재혁(Lee Jae-Hyuk),최원기(Choi Won-Ki) 한국건축친환경설비학회 2010 한국건축친환경설비학회 논문집 Vol.4 No.4

Great concern on the building energy saving and reinforced governmental energy policy have resulted in the revision of building energy regulation. To meet the energy saving requirement, buildings should be insulated much more thicker or super-insulation should be applied. In these respects, this study presents a new insulating method using low emissive and high reflective Low-E insulation through the comparative analysis of thermal performance of existing resistive insulation and Low-E insulation. To analyze those thermal performances. A unit of an apartment building was selected to calculate its thermal load depending on the alternative insulations. TRNSYS program was used for the simulation, and the results of the simulation are as follows. It was indicated that Low-E insulation could achieve the most excellent insulating performance with the thinnest structure. In case of reinforced super-insulation, the existing resistive insulation should be used as thick as 250 mm, but Low-E insulation could meet the same performance with half thickness of 120 mm. Thanks to the reduced thickness of insulation, Low-E insulation has the advantage in applying to high-rise buildings and it is believed to gather the interests of construction companies which have difficulty in solving the strick insulating problem. Based on the results of the simulation, in-situ tests on the thermal performance and workability will be followed to verify the excellence of Low-E insulation.

고효율 Low-E 단열재 개발에 관한 연구

권영철(Kwon Young-Cheol),김양오(Kim Yang-O) 한국건축친환경설비학회 2010 한국건축친환경설비학회 논문집 Vol.4 No.3

Reflective Insulation is a multilayer radiant barrier product with an intrinsic R-value. Comprised of layers of aluminum foil, nonwoven, and/or polyethylene, the insulation creates reflective airspaces within the cavity, thereby reducing radiant heat transfer and heat flow by convection. The use of aluminum foil as a reflective insulation ensures a minimum 95 to 97 percent reflectance of long-wave radiant heat. This study shows the process of development of a high-efficiency Low-E Insulation from normal reflective insulation and its possible application to the building envelop to satisfy the reinforced exterior wall insulating regulations. The configuration indicates the thickness of insulation could be reduced as half as that of existing mass insulation such as polystyrene foam board or glassfiber matt. The critical difference between Low-E insulation and the existing reflective insulation is whether it has self- reflective airspace or not. Low-E insulation has the self-reflective airspace between the aluminum foils.

학교시설 친환경인증 사례를 통한 에너지 평가항목에 대한 연구

권영철(Young-Cheol Kwon),곽문근(Moon-Geun Kwag),최창호(Chang-Ho Choi) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.12

With the increase in the demand for sustainable and environmentally-friendly development, Green Building Certification System came into force in 2002, Evaluation parts of Green Building Certification System are divided into land use and transportation, energy, ecological environment, and indoor environment. Alloted point for the part of energy is larger than other part, thus we can say that this part is very important to increase the green building performance. This study aims to analyze the present condition of design and construction for the part of energy in the certificated green school building. Total 40 certificated school buildings were selected and average scoring rate of each item was evaluated. Key particular to be considered were suggested to improve the item of energy consumption.

지하주거의 실내공기환경 실태조사와 CO₂ 조절기 및 타이머에 의한 환기팬 자동운전에 관한 연구

권영철(Kwon, Young Cheol),박진철(Park, Jin Chul) 한국생태환경건축학회 2008 한국생태환경건축학회 논문집 Vol.8 No.4