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한국신·재생에너지학회> 신재생에너지> 수소생산을 위한 태양열 이용 메탄 분해 반응기 개발

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수소생산을 위한 태양열 이용 메탄 분해 반응기 개발

Development of Methane Decomposition Reactor for Hydrogen Production Using Solar Thermal Energy

김하늘 ( Haneol Kim ) , 김종규 ( Jongkyu Kim )
  • : 한국신·재생에너지학회
  • : 신재생에너지 17권2호
  • : 연속간행물
  • : 2021년 06월
  • : 40-49(10pages)
신재생에너지

DOI


목차

Subscript
1. 서 론
2. 반응기 개발
3. 결 론
감사의 글
References

키워드 보기


초록 보기

This paper explains the development process of methane decomposition to hydrogen and carbon black using solar thermal energy. It also demonstrates the advantages and disadvantages of five different reactors for each development stage, including the reactor's experimental results. Starting with the initial direct heating type reactor, the indirect heating type reactor was developed through five modifications. The 40-kWth solar furnace installed at the Korea Institute of Energy Research was used for the experiment. In the experiment using the developed indirect heating reactor, an 89.0% methane to hydrogen conversion rate was achieved at a methane flow rate of 40 L/min, obtained at about twice the flow rate compared to previous advanced studies.

UCI(KEPA)

간행물정보

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


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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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1계시별 전기요금에서의 프로슈머와 소비자간 전력거래 가격추정

저자 : 이영준 ( Yungjoon Lee ) , 박수진 ( Soojin Park ) , 윤용범 ( Yongbeum Yoon )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 2호 발행 연도 : 2021 페이지 : pp. 1-8 (8 pages)

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We estimated the price range of electricity transactions under the prosumer system, considering the spread of renewable energy and the prospect of introducing a surplus power trading system between power consumers in Korea. The range (min/max) of power transaction prices was estimated by prosumers and consumers who could purchase electricity from utilities if needed. It is assumed that utilities purchased electricity from prosumers and consumers under a Time-of-Use (TOU) rate, trading at a monthly price. The range of available transaction prices according to the amount of power purchased from utilities and the amount of transaction power was also estimated. The price range that can be traded is expected to vary depending on variables such as the TOU rate, purchased and surplus power, levelized cost of electricity, etc.

KCI등재

2대규모 주민참여형 재생에너지 사업의 지역경제 활성화 평가지표 개발 연구

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

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 2호 발행 연도 : 2021 페이지 : pp. 9-23 (15 pages)

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In Korea, various community investment renewable project models are being implemented to increase community acceptance of renewable energy. An important factor for enhancing local acceptance is that renewable energy projects have a positive effect on revitalizing the local economy such as income increase or job creation for residents and local companies. To maximize the local economic effect of large-scale community investment renewable energy projects, this study developed an evaluation index for local economy activation, whose indicators are the local return on investment, local companies' participation, local job creation, regional cooperation, transparency, and governance. Analysis of existing evaluation indicators and current renewable projects, financial analysis, and expert interviews were used in this research. The pilot evaluation determined that, the local economic effect was high in the following order: a fund investment wind project (Gangwon), benefit-sharing wind project (Jeju), and general wind project. In particular, residents' investment amount, the number of participating residents, and the amount and transparency of the regional cooperation fund were key factors to expand the effect of local economy activation. This evaluation index could be used in public bidding for renewable energy projects such as offshore wind zoning areas of local government.

KCI등재

3Investigation of EVA Accelerated Degradation Test for Silicon Photovoltaic Modules

저자 : Jaeun Kim , Matheus Rabelo , Markus Holz , Eun-chel Cho , Junsin Yi

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 2호 발행 연도 : 2021 페이지 : pp. 24-31 (8 pages)

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Renewable energy has become more popular with the increase in the use of solar power. Consequently, the disposal of defective and old solar panels is gradually increasing giving rise to a new problem. Furthermore, the efficiency and power output decreases with aging. Researchers worldwide are engaged in solving this problem by developing eco-module technologies that restore and reuse the solar panels according to the defect types rather than simple disposal. The eco-module technology not only solves the environmental problem, but also has economic advantages, such as extending the module life. Replacement of encapsulants contributes to a major portion of the module maintenance plan, as the degradation of encapsulants accounts for 60% of the problems found in modules over the past years. However, the current International Electrotechnical Commission (IEC) standard testing was designed for the commercialization of solar modules. As the problem caused by long-term use is not considered, this method is not suitable for the quality assurance evaluation of the eco-module. Therefore, to design a new accelerated test, this paper provides an overview of EVA degradation and comparison with the IEC and accelerated tests.

KCI등재

4사무용 폐지에서 유래된 글루코오스를 이용한 레불린산 생산

저자 : 반세은 ( Se-eun Ban ) , 박윤 ( Yoon Park ) , 이성초 ( Sung-cho Yi ) , 임예은 ( Ye-eun Lim ) , 이재원 ( Jae-won Lee )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 2호 발행 연도 : 2021 페이지 : pp. 32-39 (8 pages)

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The optimal conditions for producing levulinic acid from office waste paper were investigated. Glucose was produced by enzymatic hydrolysis and its yield maximized by varying the soaking time of the substrate and amounts of enzyme and substrate. The optimal conditions to produce levulinic acid using the hydrolysate were determined by response surface methodology, with reaction temperature and catalyst (sulfuric acid) concentration as independent variables. The production model was assessed with an ANOVA regression analysis, and the results indicate its suitability for levulinic acid production (p, F, and lack-of-fit values were 0.003, 20.1, and 0.058, respectively). The optimal conditions were a reaction time of 56.27 min and catalyst concentration of 5.9% with a predicted yield of 2.588 g/L. We verified the findings under the same conditions and obtained 2.323 g/L of levulinic acid.

KCI등재

5수소생산을 위한 태양열 이용 메탄 분해 반응기 개발

저자 : 김하늘 ( Haneol Kim ) , 김종규 ( Jongkyu Kim )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 2호 발행 연도 : 2021 페이지 : pp. 40-49 (10 pages)

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This paper explains the development process of methane decomposition to hydrogen and carbon black using solar thermal energy. It also demonstrates the advantages and disadvantages of five different reactors for each development stage, including the reactor's experimental results. Starting with the initial direct heating type reactor, the indirect heating type reactor was developed through five modifications. The 40-kWth solar furnace installed at the Korea Institute of Energy Research was used for the experiment. In the experiment using the developed indirect heating reactor, an 89.0% methane to hydrogen conversion rate was achieved at a methane flow rate of 40 L/min, obtained at about twice the flow rate compared to previous advanced studies.

KCI등재

6대면적 분리판의 운전 환경 불균일성을 고려한 MEA 성능최적화 방법

저자 : 김성민 ( Sungmin Kim ) , 손영준 ( Young-jun Sohn ) , 우승희 ( Seunghee Woo ) , 박석희 ( Seok-hee Park ) , 정남기 ( Namgee Jung ) , 임성대 ( Sung-dae Yim )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 17권 2호 발행 연도 : 2021 페이지 : pp. 50-58 (9 pages)

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We proposed an MEA development methodology that accurately measures intrinsic MEA performance while considering the uneven reaction environments formed inside a large-area BP. To facilitate measurement of the inherent MEA performance, we miniaturized the active area of the MEA to 3 cm2, and prepared two MEAs with different ionomer contents of 0.65 and 0.80 (I/C). By simulating the operating conditions of a 100 cm2 BP at the inlet (I), center (C), and outlet (O), the oxygen concentration and relative humidity were determined to be 20.7, 13.8, 11.7%, and 50, 66.1, and 70.1% respectively. We measured the performance and electrochemical analysis of the prepared MEAs under the three simulated conditions. Based on the results of statistical analysis of the evaluated MEA performance data, I/C 0.65 MEA had a higher average performance and lower performance deviation than I/C 0.80 MEA. Hence, it can be concluded that an I/C 0.65 MEA is a more effective MEA for large-area BP. Based on the above research process, we confirmed the effectiveness of the proposed MEA development methodology.

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