다층적 관점에서 바라본 에너지경관의 변동: 태양광 모듈 탄소인증제를 사례로

장근용 ( Geunyong Jang ) 한국경제지리학회 2021 한국경제지리학회지 Vol.24 No.4

This study examined changes in the energy landscape, focusing on the photovoltaic module carbon certification system. As the global photovoltaic market has been reorganized around Chinese companies, the South Korean government has pushed to strengthen the competitiveness of the nation’s photovoltaic industry. However, a limitation remains in that the government-led effort was not sufficient to bring about dynamic changes in the energy landscape. Against this backdrop, this study explored the stages leading to the multi-level perspectives of “macro-environment, socio-technical regime, and niche” to track the process of the government and domestic photovoltaic companies as part of a socio-technical regime responding to global market changes. In particular, this study raised an issue with the conceptual discussion of multi-level perspective, which placed a particular emphasis on the rate of change at each level and the niche in which innovative experiments take place, and thus attempted to fill this gap by tracking the energy landscape that varies differently from space. These spatial discussions can track different carbon emissions coefficients and industrial characteristics for each country, and have a higher level of explanatory power for the system thus constructed. In addition, through discussions on the problems and implications of the government-led introduction of renewable energy policies, this study suggests the need to create and implement a field-oriented system.

회원작품 - 세 상자

방재웅,장근용,권혁철,Bang, Jaewoong,Jang, Geunyong,Kwon, Hyukchul 대한건축사협회 2022 建築士 Vol.637 No.-

회원작품 - 공흥리 근린생활시설 '젠가'

방재웅,장근용,권혁철,Bang, Jaewoong,Jang, GeunYong,Kwon, Hyukchul 대한건축사협회 2024 建築士 Vol.661 No.-

지역산업 경로창출의 장소의존성: 태양광산업 선도기업의 충청북도 솔라밸리 입지 과정을 중심으로

이재열,장근용 한국지리학회 2020 한국지리학회지 Vol.9 No.1

충청북도는 지난 10여 년 동안 솔라밸리라는 명칭의 우리나라 최대의 태양광 셀 및 모듈 생산 지역으로 거듭났다. 이러한 새로운 지역산업 ‘경로창출’에서 현대에너지솔루션, 신성이엔지, 한화솔루션을 비롯한 태양광산업 선도기업의 입지가 중요한 역할을 하였다. 이를 배경으로 태양광산업 선도기업의 솔라밸리 입지 과정에 주목하며 지역산업 경로창출의 장소의존적 성격을 살폈다. 경로창출에 대한 개념적 논의에서는 역사적 ‘우연성’과 지리적 ‘임의성’에만 주목했던 지리경제학과 캘리포니아학파의 관점에 문제를 제기하며, 경제지리사(地理史)와 지역 주체들의 전략적 행위에 주목하여 ‘장소의존성’을 강조하고 인과적 설명을 추구하는 진화경제지리학의 관점을 수용했다. 충북 지역에서 분공장경제 발전 궤적의 지리사와 최근의 정책적 프로그램과 전략이 선도기업 유치와 솔라밸리 형성의 중추적 원동력으로 파악됐기 때문이다. 이에 대한 상세한 기술과 함께 본 논문에서는 이런 형식의 ‘기업가적’ 지역산업 정책의 잠재적 문제점과 함의에 대한 토론도 제시한다. The Province of Chungbuk has risen to the largest photovoltaic industry region, which is called Solar Valley and specialized in solar cells and modules, in South Korea for a decade now. Crucial to the path creation of a new regional industry is attracting and locating industry lead firms including Hyundai Energy Solution, Shinsung E&G, and Hanwha Solution. Against this backdrop, this study examines the place-dependent nature of the new regional path creation in Chungbuk from an evolutionary economic geography perspective focused on such place-dependent processes as economic geohistories and purposeful strategic actions in the region, critiquing geographical economics and California School approaches centered on historical ‘accident’ and geographical ‘randomness’ in their explication of regional path creation. Particular attention is paid to how the geohistorical trajectory of branch plant economy and the unfolding of proactive policy strategies condition and contextualize the formation of Solar Valley. Coupled with detailed explications on the issues, this paper also offers a discussion of potential problems rising from such an ‘entrepreneurial’ mode of regional policy-making, as well as a reflection on the study’s policy implications.

회원작품 - 도곡리 단독주택 '다정(多庭)'

방재웅,장근용,권혁철,Bang, Jaewoong,Jang, GeunYong,Kwon, Hyukchul 대한건축사협회 2023 建築士 Vol.657 No.-

회원작품 - 더 라움 서울

방재웅,장근용,Bang, Jaewoong,Jang, Geunyong 대한건축사협회 2022 建築士 Vol.634 No.-

태양광 폐실리콘 웨이퍼 회수 실리콘을 활용한 탄화규소 분말 합성

이윤주,권오규,선주형,장근용,최준철,권우택 한국자원리싸이클링학회 2022 資源 리싸이클링 Vol.31 No.5

Silicon carbide powder was prepared from carbon black and silicon recovered from waste solar panels. In the solar power generation market, the number of crystalline silicon modules exceeds 90%. As the expiration date of a photovoltaic module arrives, the development of technology for recovering and utilizing silicon is very important from an environmental and economic point of view. In this study, silicon was recovered as silicon carbide from waste solar panels: 99.99% silicon powder was recovered through purification from a 95.74% purity waste silicon wafer. To examine the synthesis characteristics of SiC powder, purified 99.99% silicon powder and carbon powder were mixed and heat-treated (1,300, 1,400 and 1,500 °C) in an Ar atmosphere. The characteristics of silicon and silicon carbide powders were analyzed using particle size distribution analyzer, XRD, SEM, ICP, FT-IR, and Raman analysis. 태양광 폐실리콘 웨이퍼에서 회수한 실리콘과 카본블랙을 활용하여 탄화규소 분말을 제조하였다. 태양광 발전시장에서 결정질 실리콘 모듈이 90% 이상을 차지한다. 태양광 모듈의 사용기한이 도래함에 따라 환경과 경제적인 측면에서 실리콘을 회수하고 활용하는 기술은 매우 중요하다. 본 연구에서는 태양광 폐패널에서 회수한 실리콘을 탄화규소 원료로 활용하기 위하여, 순도 95.74% 폐실리콘 웨이퍼로부터 정제과정을 거쳐 99.99% 실리콘 분말을 회수하였다. 탄화규소 분말 합성특성을 살펴보기 위하여, 정제된 99.99% 실리콘 분말과탄소분말을 혼합한 후, Ar 분위기에서 열처리(1,300℃, 1,400℃, 1,500℃)과정을 수행하였다. 실리콘과 탄화규소 분말의 특성을 입도분포, XRD, SEM, ICP, FT-IR 및 Raman 분석기를 사용하여 분석하였다.

메커니컬 실 제조공정에서 폐패널 실리콘 재활용의 전과정 평가

신병철 ( Byung-chul Shin ),장근용 ( Geun-yong Jang ),최준철 ( Joon-chul Choi ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.1

In this study, an environmental evaluation of a mechanical seal manufacturing process involving recycled silicon from end-of-life PV panels was conducted using the life cycle assessment (LCA) approach. The β-phase silicon carbide (β-SiC), which was synthesized from recycled silicon and carbon through a direct carbonization method, exhibited a high crystallite size range of 18 ~ 21 μm and purity of 99.9%, suggesting its suitability as a raw material for the manufacture of mechanical seals. The wet method of fine grinding and mixing of raw materials was improved to a dry method without using a solvent. Global warming emissions and photochemical oxidants were decreased from 40 to 27.6 kg-CO₂/kg-SiC and 2.23 to 0.124 kg-C₂H₄/kg-SiC, corresponding to decreasing rates of 31.1 and 94.5%, respectively, following the mixing of ground SiC with carbon (C) and the improvement of β-SiC granulation using a dry method. Whereas recycling Si of end-of-life PV panels reduced the resource depletion- and global warming-associated environmental impacts by 61.9 and 64.1%, respectively. On the other hand, weight analysis showed a reduction of the overall environmental impacts by 54.3%, while those related to resource depletion, global warming, and photochemical oxidant formation were reduced by 40.8, 35.7, and 19.4%, respectively, even though only the global warming potential (GWP) exhibited very high values in the characterization results. The obtained results demonstrated the contributions of electricity consumption during the β-SiC synthesis process and high-temperature calcination to global warming. Moreover, SiC chunk results in resource depletion and global warming, while hydrogen peroxide generates photochemical oxidants. The LCA analysis was useful in this study for quantitatively assessing the effects of the improved environmental impacts. Recycling SiC from end-of-life PV panels could be a valuable approach to ensuring sustainable development due to the low carbonization and clean manufacturing process.

태양광 폐모듈 실리콘을 재활용한 메커니컬 실 제조공정의 환경성평가

신병철,신지원,권우택,최준철,선주형,장근용 한국청정기술학회 2022 청정기술 Vol.28 No.3

An environmental evaluation was conducted by employing LCA methodology for a mechanical seal manufacturing process that uses recycled silicon recovered from end-of-cycle PV modules. The recycled silicon was purified and reacted with carbon to synthesize β-SiC particles. Then the particles underwent compression molding, calcination and heat treatment to produce a product. Field data were collected and the potential environmental impacts of each stage were calculated using the LCI DB of the Ministry of Environment. The assessment was based on 6 categories, which were abiotic resource depletion, acidification, eutrophication, global warming, ozone depletion and photochemical oxidant creation. The environmental impacts by category were 45 kg CO2 for global warming and 2.23 kg C2H4 for photochemical oxide creation, and the overall environmental impact by photochemical oxide creation, resource depletion and global warming had a high contribution of 98.7% based on weighted analysis. The wet process of fine grinding and mixing the raw silicon and carbon, and SiC granulation were major factors that caused the environmental impacts. These impacts need to be reduced by converting to a dry process and using a system to recover and reuse the solvent emitted to the atmosphere. It was analyzed that the environmental impacts of resource depletion and global warming decreased by 53.9% and 60.7%, respectively, by recycling silicon from end-of-cycle PV modules. Weighted analysis showed that the overall environmental impact decreased by 27%, and the LCA analysis confirmed that recycling waste modules could be a major means of resource saving and realizing carbon neutrality. 본 연구에서는 태양광 폐모듈 해체과정에서 회수한 실리콘을 재활용하여 기계구조용 메커니컬 실을 제조하는 공정에 대해 전과정평가 방법에 의한 환경성평가를 수행하였다. 재활용 실리콘은 고순도 정제 후 탄소와 반응시켜 β-SiC 입자로 합성하고 압축 성형, 소결 및 열처리를 거쳐 제품을 생산한다. 현장 데이터 수집 및 환경부 LCI DB를 활용하여 각 단계별로 자원고갈, 산성화, 부영양화, 지구온난화, 오존층파괴, 광화학산화물 등 6개 영역의 환경영향을 산정하였다. 영향범주 별 환경영향은 지구온난화 45 kg CO2, 광화학산화물 2.23 kg C2H4으로 크게 나타났으며 가중화 분석결과 광화학산화물, 자원고갈 및 지구온난화에 의한 환경영향이 98.7%로 높은 기여도를 차지하였다. 원료 실리콘과 탄소를 미분쇄 혼합하는 습식공정과 β-SiC 과립화공정이 주요한 환경영향 유발요인이므로 건식공정으로 전환 및 대기 배출되는 용매는 회수하여 재이용하는 시스템으로 개선이 필요하다. 폐모듈 실리콘의 재활용에 의해 자원고갈의 영향은 53.9%, 지구온난화는 60.7% 감소하며 가중화 결과 전체적인 환경영향이 27% 감소하는 것으로 분석되어 폐모듈 재활용은 자원절약과 탄소중립 실현의 주요 수단이 될 수 있음을 LCA 분석으로 확인하였다.

태양광 폐패널 회수 실리콘을 활용한 탄화규소 분말 합성

권우택(Wooteck Kwon),권오규(Oh-Kyu Kwon),최준철(Joon-Chul Choi),장근용(Geun-Yong Jang) 한국환경에너지공학회 2022 한국열환경공학회 학술대회지 Vol.2022 No.2

Silicon carbide powder was prepared using carbon black and silicon recovered from the solar waste panel. In the solar power generation market, crystalline silicon modules are more than 90%. As the expiration date of the photovoltaic module arrives, technology for recovering and utilizing silicon from an environmental and economic point of view is very important. In this study, in order to use silicon recovered from a solar waste panel as a silicon carbide raw material, 99.99% silicon powder was recovered through a purification process from a 95.74% purity waste silicon wafer. To examine the synthesis characteristics of silicon carbide powder, the purified 99.99% silicon powder and carbon powder were mixed, and then heat treatment (l,300° C, 1,400° C, 1,500° C) was performed in an Ar atmosphere. The characteristics of silicon and silicon carbide powder were analyzed using particle size distribution. XRD, SEM, ICP, FT-IR, and Raman analyzer.