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한국신·재생에너지학회> 신재생에너지> 태양열 이용 바이오메탄 분해 해석연구

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태양열 이용 바이오메탄 분해 해석연구

Simulation Analysis of Bio-Methane Decomposition Using Solar Thermal Energy

김하늘 ( Haneol Kim ) , 이상남 ( Sangnam Lee ) , 이상직 ( Sang Jik Lee ) , 김종규 ( Jongkyu Kim )
  • : 한국신·재생에너지학회
  • : 신재생에너지 17권1호
  • : 연속간행물
  • : 2021년 03월
  • : 40-49(10pages)
신재생에너지

DOI


목차

1. 서 론
2. 메탄 분해반응 시스템
3. 해석방법
4. 해석결과
5. 결 론
감사의 글
References

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초록 보기

In this study, the optical properties, heat transfer capabilities and chemical reaction performance of a methane thermal decomposition reactor using solar heat as a heat source were numerically analyzed on the basis of the cavity shape. The optical properties were analyzed using TracePro, a Monte Carlo ray tracing-based program, and the heat transfer analysis was performed using Fluent, a CFD program. An indirect heating tubular reactor was rotated at a constant speed to prevent damage by the heat source in the solar furnace. The inside of the reactor was filled with a porous catalyst for methane decomposition, and the outside was insulated to reduce heat loss. The performance of the reactor, based on cavity shape, was calculated when solar heat was concentrated on the reactor surface and methane was supplied into the reactor in an environment with a solar irradiance of 700 W/㎡, a wind speed of 1 m/s, and an outdoor temperature of 25°C. Thus, it was confirmed that the heat loss of the full-cavity model decreased to 13% and the methane conversion rate increased by 33.5% when compared to the semi-cavity model.

UCI(KEPA)

간행물정보

  • : 공학분야  > 화학공학
  • : KCI등재
  • :
  • : 계간
  • : 1738-3935
  • : 2713-9999
  • : 학술지
  • : 연속간행물
  • : 2005-2021
  • : 523


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17권3호(2021년 09월) 수록논문
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KCI등재

1방음벽 PVT의 공기유로 설계를 위한 CFD 시뮬레이션 사전 분석 연구

저자 : 김유진 ( Yu-jin Kim ) , 김기봉 ( Ki-Bong Kim ) , 이의준 ( Euy-joon Lee ) , 강은철 ( Eun-chul Kang )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 3호 발행 연도 : 2021 페이지 : pp. 1-7 (7 pages)

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The Korean government announced various energy policies, such as the to reduce 37% of the business-as-usual (BAU) greenhouse gas emissions by 2030. The policies aim to increase the renewable electricity generation ratio to 20% by 2030. PVT is a hybrid technology, which combines photovoltaic (PV) and solar collectors. It is capable of generating electricity and thermal energy simultaneously. It has a great potential to be used as a renewable and clean solar energy. However, there exists a shortage of space for the installation of PVT systems in Korea. To overcome this, in this paper proposes four types of soundproof wall PVT air channels, which were designed and optimized, based on the CFD (Computation Fluid Dynamic) analysis results. The thermal energy generation for multiple PVT units connected in series and pressure drop sensitivity were analyzed, depending on inlet velocity.

KCI등재

2합성가스 발효에서 배지 내 Vitamin 농도의 에탄올 생산에 대한 영향

저자 : 임홍래 ( Hongrae Im ) , 안태광 ( Taegwang An ) , 박소은 ( Soeun Park ) , 김영기 ( Young-kee Kim )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 3호 발행 연도 : 2021 페이지 : pp. 8-15 (8 pages)

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In this study, we assessed the effect of vitamin components (such as biotin, thiamine-HCl, and folic acid) on microorganism microbial growth and ethanol production was examined to enhance increase the ethanol concentration in the Clostridium autoethanogenum culture process using syngas as a sole carbon source. Biotin and folic acid concentrations of 0.2, 2, 20, and 100 μg/L were used in the culture experiments at 0.2, 2, 20, and 100 μg/L concentrations. The maximum ethanol concentrations of 2.81 g/L and 3.12 g/L were obtained by adding at 0.2 μg/L biotin and folic acid, respectively. Moreover, Thiaminethiamine--HCl at concentrations of 0.5, 5, 50, and 250 μg/L were was examined evaluated to in the culture experiments. The maximum ethanol concentration of 2.84 g/L was observed at 0.5 μg/L of thiamine--HCl. As a resultThus, the optimized concentrations of biotin, thiamine--HCl, and folic acid were determined at 0.2, 0.5, and 0.2 μg/L, respectively, for enhancing increasing the ethanol production. In conclusion, the maximum ethanol production was obtained by adding the minimal concentration of vitamins in C. autoethanogenum culture.

KCI등재

3부유식 해상태양광 발전을 위한 단위 플랫폼 구조물의 실해역 성능평가

저자 : 나경원 ( Kyoung Won Na ) , 추진훈 ( Jinhun Choo ) , 이병준 ( Byung Jun Lee )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 3호 발행 연도 : 2021 페이지 : pp. 16-23 (8 pages)

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Recently, the Korean government announced a plan to activate renewable energies, with focus on clean energy sources such as solar and wind power as the core and the goal of achieving carbon neutrality by 2050. Unlike other photovoltaic (PV) systems, offshore PV installations are advantageous for large-scale expansion because of the ease of securing sites; they also enable lowering the power generation costs based on construction of large-scale power facilities of megawatt class or higher owing to low noise and landscape damage. However, any power generation should proceed with consideration of the special environmental conditions of the ocean. Above all, when installing large-scale facilities, it is important to reduce fluctuations of the structure and secure stability to actively respond to waves. This study is concerned with the development of a floating body technology that actively responds to waves so as to enable commercialization of offshore solar power. A unit platform for research and development on offshore PV generation was installed in the Saemangeum sea, and the structural fluctuations and stability were analyzed to ensure conformity with the major performance indicators.

KCI등재

4말도 인근 해상풍력발전에 대한 주민수용성 연구

저자 : 박재필 ( Jaepil Park ) , 이상혁 ( Sanghyuk Lee )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 3호 발행 연도 : 2021 페이지 : pp. 24-31 (8 pages)

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Through 'The Renewable Energy 3020 Implementation Plan' for carbon neutrality, the government promised to raise the proportion of renewable energy generation to 20% and renewable energy installation capacity to 63.8% by 2030. Therefore, we plan to test a 5.5 MW offshore wind turbine near Maldo, Gunsan. In this project, we measure the level of public acceptance and perform ordinary least squares (OLS) regression analysis to show the determinants of public acceptance. The regression results are as followed. First, it is judged that the closer the distance to the offshore wind turbine, the more the economic effects considered by residents. Second, especially in Maldo, the experience of being discriminated from the Saemangeum project, is understood to have caused distrust in the surrounding fishing villages chief/Fisheries Cooperatives, converted into a local community effect. Finally, the policy implications are as follows. First, a bottom-up problem-solving method is required to improve public acceptance, based on the Living Lab. Second, the island community may be indifferent to the briefings or forums of outsiders. Therefore, a gradual approach is required through (in)formal channels based on reliability from a long-term perspective with nearby universities and research institutes using SamsØ Energy Academy.

KCI등재

5암반 대수층에서 개방형 지열 시스템의 개발 및 적용

저자 : 심병완 ( Byoung Ohan Shim ) , 김성균 ( Seong-kyun Kim ) , 최한나 ( Hanna Choi ) , 이수형 ( Soo-hyoung Lee ) , 하규철 ( Kyoochul Ha ) , 김용철 ( Yongchul Kim )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 3호 발행 연도 : 2021 페이지 : pp. 32-41 (10 pages)

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A groundwater source heat pump (GWHP) was developed in this study by adapting a borehole heat exchanger with closed-loop and open-loop systems in a new building. In the pilot test building, the air-conditioning on the second floor was designed to employ a closed-loop system and that on the third floor had an open-loop system. The GWHP design is based on the feasibility of groundwater resources at the installation site. For the hydrogeological survey of the study site, pumping and injection tests were conducted, and the feasibility of GWHP installation was evaluated based on the air-conditioning load demand of the building. The site was found to be satisfactory for the design capacity of the thermal load and water quality. In addition, the effect of groundwater movement on the performance of the closed-loop system was tested under three different operational scenarios of groundwater pumping. The performance of the system was sustainable with groundwater flow but declined without appropriate groundwater flow. From long-term observations of the operation, the aquifer temperature change was less than 2℃ at the observation well and 5℃ at the injection well with respect to the initial groundwater temperature. This pilot study is expected to be of guidance for developing GWHPs at fractured rock aquifers.

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1고효율 태양전지 적용을 위한 저온 투명전극 소재 연구현황 리뷰

저자 : 박형식 ( Hyeongsik Park ) , 김영국 ( Youngkuk Kim ) , 오동현 ( Donghyun Oh ) , 팜뒤퐁 ( Duy Phong Pham ) , 송재천 ( Jaechun Song ) , 이준신 ( Junsin Yi )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 1-6 (6 pages)

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Transparent conducting oxide (TCO) films have been widely used in optoelectronic devices, such as OLEDs, TFTs, and solar cells. However, thin films of indium tin oxide (ITO) have few disadvantages pertaining to process parameters such as substrate temperature and sputtering power. In this study, we investigated the requirements for using TCO films in silicon-based solar cells and the best alternative TCO materials to improve their efficiency. Moreover, we discussed the current status of high-efficiency solar cells using low-temperature TCO films such as indium zinc oxide and Zr-doped indium oxide.

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2서울시 미니태양광 설치 과정에서 시장 행위자 역할 이해와 활성화 방안: 실천이론 관점을 바탕으로

저자 : 하지훈 ( Jihun Ha ) , 황보은영 ( Eunyoung Hwangbo ) , 안주영 ( Juyoung Ahn ) , 윤순진 ( Sun-jin Yun )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 7-18 (12 pages)

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This study analyzes the role of market actors in the energy transition process and the interaction between them and ordinary citizens, primarily focusing on the mini-PV project in Seoul. The study also proposes measures to harness market actors' activities and successfully implement the distribution of mini-PV systems in Seoul. In this study, practice theory is used as a theoretical resource to analyze the interaction between market actors and civil society actors and to help understand how market actors influence the decisions of regular citizens in installing mini-PV at their properties. After conducting surveys and hosting in-depth interviews with ordinary citizens and market actors, it was found that to further promote the role of market actors, the Seoul Metropolitan Government should actively support and monitor the public relations activities of market actors, while concurrently managing selected companies and establishing relevant administrative systems for continued effective use post-installation of mini-PV systems. In future studies of the energy transition process, market actors should also be recognized as key players, along with government and civil society actors, and their roles should be studied in a balanced way.

KCI등재

3A Review on Degradation of Silicon Photovoltaic Modules

저자 : Hasnain Yousuf , Muhammad Quddamah Khokhar , Muhammad Aleem Zahid , Jaeun Kim , Youngkuk Kim , Sung Bae Cho , Young Hyun Cho , Eun-chel Cho , Junsin Yi

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 19-32 (14 pages)

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Photovoltaic (PV) panels are generally treated as the most dependable components of PV systems; therefore, investigations are necessary to understand and emphasize the degradation of PV cells. In almost all specific deprivation models, humidity and temperature are the two major factors that are responsible for PV module degradation. However, even if the degradation mode of a PV module is determined, it is challenging to research them in practice. Long-term response experiments should thus be conducted to investigate the influences of the incidence, rates of change, and different degradation methods of PV modules on energy production; such models can help avoid lengthy experiments to investigate the degradation of PV panels under actual working conditions. From the review, it was found that the degradation rate of PV modules in climates where the annual average ambient temperature remained low was -1.05% to -1.16% per year, and the degree of deterioration of PV modules in climates with high average annual ambient temperatures was -1.35% to -1.46% per year; however, PV manufacturers currently claim degradation rates of up to -0.5% per year.

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4실내 에너지저장시스템 공조시스템의 열적 거동에 관한 연구

저자 : 김준영 ( Junyoung Kim ) , 최낙삼 ( Naksam Choi ) , 김진택 ( Jintaek Kim )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 33-39 (7 pages)

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The energy use is increasing as the quality of human life improves. and research on the efficient use of energy in ESS (Energy Storage System) is ongoing. An air conditioner is required for the efficient use of an ESS, as are data on the distribution of the temperature of the latter based on the capacity of the air conditioner. In the absence of an air conditioner, the battery of the ESS reaches its maximum temperature of 40℃ after 2 h. When an air conditioner is present, the temperature of the battery stabilizes as the capacity of the former increases.

KCI등재

5태양열 이용 바이오메탄 분해 해석연구

저자 : 김하늘 ( Haneol Kim ) , 이상남 ( Sangnam Lee ) , 이상직 ( Sang Jik Lee ) , 김종규 ( Jongkyu Kim )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 40-49 (10 pages)

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In this study, the optical properties, heat transfer capabilities and chemical reaction performance of a methane thermal decomposition reactor using solar heat as a heat source were numerically analyzed on the basis of the cavity shape. The optical properties were analyzed using TracePro, a Monte Carlo ray tracing-based program, and the heat transfer analysis was performed using Fluent, a CFD program. An indirect heating tubular reactor was rotated at a constant speed to prevent damage by the heat source in the solar furnace. The inside of the reactor was filled with a porous catalyst for methane decomposition, and the outside was insulated to reduce heat loss. The performance of the reactor, based on cavity shape, was calculated when solar heat was concentrated on the reactor surface and methane was supplied into the reactor in an environment with a solar irradiance of 700 W/㎡, a wind speed of 1 m/s, and an outdoor temperature of 25°C. Thus, it was confirmed that the heat loss of the full-cavity model decreased to 13% and the methane conversion rate increased by 33.5% when compared to the semi-cavity model.

KCI등재

6지속가능한 산림바이오매스 정책개발을 위한 영국사례 연구

저자 : 이승록 ( Seung-rok Lee ) , 한규성 ( Gyu-seong Han )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 50-60 (11 pages)

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This study investigated the reference case in the UK where legality and sustainability were systematically established for forest biomass represented by wood pellets. The UK is the country that best utilizes the trade value of wood pellets based on sustainability, with bioenergy accounting for 31% of total renewable energy production. The UK imported wood pellet, estimated 8,697 thousand tons in 2019. The UK government has continuously improved the renewable generation policy system to ensure the sustainability of wood pellets. The weighted average greenhouse gas emissions of a UK biomass power plant that received a Renewable Obligation Certificate (ROC) in 2018-19 was 26.71 gCO2e/MJ. These power plants are expected to meet the upper limit of 72.2 gCO2e/MJ by 2025. To issue an ROC, the biomass power plant must demonstrate that 70% of its total biofuel usage is sustainable. The UK uses the Sustainable Biomass Program (SBP) certification system, which is gradually expanding to other European countries, to prove the sustainability of biomass energy fuels. Global wood pellet production with SBP certification in 2019 was 10.5 Mt. This trend has significant implications for introducing additional sustainability into the wood pellet policy of South Korea.

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7주민참여형 재생에너지 개발의 지역경제 기여효과: 주민소득과 지역기업 매출을 중심으로

저자 : 김윤성 ( Yunsoung Kim ) , 윤성권 ( Seonggwon Yun ) , 임현지 ( Hyunji Im ) , 윤태환 ( Taewhan Yun )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 1호 발행 연도 : 2021 페이지 : pp. 61-75 (15 pages)

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Power generation using solar PV and wind power are more feasible to compete with fossil fuel power generation. However, residential acceptance is still a big challenge in the deployment of renewable energy. The Korean government has implemented various policies to support the development of renewable energy in which communities invest. However, there are very few cases of the commercial operation of community-invested renewable energy power plants. Renewable energy has attracted attention in the reduction of greenhouse gasses (GHG) effects and economic feasibility. However, it is also necessary to focus on socio-economic effects to overcome the economic recession while reducing greenhouse emissions. Community-invested renewable energy development projects can positively revitalize the local economy in many aspects, such as resident income, job creation, and the growth of local businesses. This study analyzes the local economic impact of renewable energy development projects on residents' income and job creation. It increased local companies' sales through community-invested development projects in Korea.

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