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수록정보
수록범위 : 1권1호(2005)~18권1호(2022) |수록논문 수 : 531
신재생에너지
18권1호(2022년 03월) 수록논문
최근 권호 논문
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KCI등재

1제주 동복·북촌 풍력발전단지의 바람환경 특성분석

저자 : 정형세 ( Hyeong-se Jeong ) , 김연희 ( Yeon-hee Kim ) , 최희욱 ( Hee-wook Choi )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 18권 1호 발행 연도 : 2022 페이지 : pp. 1-16 (16 pages)

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Climatic characteristics were described using the LiDAR (Light Detection and Ranging) and the met-mast on Dongbok·Bukchon region. The influences of meteorological conditions on the power performance of wind turbines were presented using the data of Supervisory Control And Data Acquisition (SCADA) and met-mast of the Dongbok·Bukchon Wind Farm (DBWF) located in Jeju Island. The stability was categorized into three parameters (Richardson number, Turbulence intensity, and Wind shear exponent). DBWF was dominant in unstable atmospheric conditions. At wind speeds of 14 m/s or more, the proportion of slightly unstable conditions accounted for more than 50%. A clear difference in the power output of the wind turbine was exhibited in the category of atmospheric stability and turbulence intensity (TI). Particularly, a more sensitive difference in power performance was showed in the rated wind speeds of the wind turbine and wind regime with high TI. When the flow had a high turbulence at low wind speeds and a low turbulence at rated wind speeds, a higher wind energy potential was produced than that in other conditions. Finally, the high-efficiency of the wind farm was confirmed in the slightly unstable atmospheric stability. However, when the unstable state become stronger, the wind farm efficiency was lower than that in the stable state.

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2Effective markov transition matrix를 이용한 풍속예측 및 MCP 모델과 비교

저자 : 강민상 ( Minsang Kang ) , 손은국 ( Eunkuk Son ) , 이진재 ( Jinjae Lee ) , 강승진 ( Seungjin Kang )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 18권 1호 발행 연도 : 2022 페이지 : pp. 17-28 (12 pages)

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This paper presents an effective Markov transition matrix (EMTM), which will be used to calculate the wind speed at the target site in a wind farm to accurately predict wind energy production. The existing MTS prediction method using a Markov transition matrix (MTM) exhibits a limitation where significant prediction variations are observed owing to random selection errors and its bin width. The proposed method selects the effective states of the MTM and refines its bin width to reduce the error of random selection during a gap filling procedure in MTS. The EMTM reduces the level of variation in the repeated prediction of wind speed by using the coefficient of variations and range of variations. In a case study, MTS exhibited better performance than other MCP models when EMTM was applied to estimate a one-day wind speed, by using mean relative and root mean square errors.

KCI등재

3고효율 TOPCon 태양전지의 SiOX/poly-Si박막 형성 기법과 passivating contact 특성

저자 : 김성헌 ( Sungheon Kim ) , 김태용 ( Taeyong Kim ) , 정성진 ( Sungjin Jeong ) , 차예원 ( Yewon Cha ) , 김홍래 ( Hongrae Kim ) , 박소민 ( Somin Park ) , 주민규 ( Minkyu Ju ) , 이준신 ( Junsin Yi )

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 18권 1호 발행 연도 : 2022 페이지 : pp. 29-34 (6 pages)

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The most prevalent cause of solar cell efficiency loss is reduced recombination at the metal electrode and silicon junction. To boost efficiency, a a SiOX/poly-Si passivating interface is being developed. Poly-Si for passivating contact is formed by various deposition methods (sputtering, PECVD, LPCVD, HWCVD) where the ploy-Si characterization depends on the deposition method. The sputtering process forms a dense Si film at a low deposition rate of 2.6 nm/min and develops a low passivation characteristic of 690 mV. The PECVD process offers a deposition rate of 28 nm/min with satisfactory passivation characteristics. The LPCVD process is the slowest with a deposition rate of 1.4 nm/min, and can prevent blistering if deposited at high temperatures. The HWCVD process has the fastest deposition rate at 150 nm/min with excellent passivation characteristics. However, the uniformity of the deposited film decreases as the area increases. Also, the best passivation characteristics are obtained at high doping. Thus, it is necessary to optimize the doping process depending on the deposition method.

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4Feasibility Study of the Introduction of Hydrogen System and Plus DR on Campus MG

저자 : Gyuha Woo , Soojin Park , Yongbeum Yoon

발행기관 : 한국신·재생에너지학회 간행물 : 신재생에너지 18권 1호 발행 연도 : 2022 페이지 : pp. 35-45 (11 pages)

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The renewable energy based MG is becoming one of the prominent solutions for greenhouse gas and constructing less power lines. However, how to procure the economics of MG considering the CO2 emission and utility network impact is one of major issues as the proportion of renewable resource increases. This paper proposes the feasibility study scheme of campus MG and shows that the LCOE and CO2 emission can be reduced by utilizing the excess power and introducing hydrogen system and plus DR. For this, the three cases: (a) adding the PV and selling excess power to utility, (b) producing and selling hydrogen using excess power, and (c) participating in plus DR are considered. For each case, not only the topology and component capacity of MG to secure economic feasibility, but also CO2 emission and utility network effects are derived. If an electrolyzer with a capacity of 400 kW participates in plus DR for 3,730hours/year, the economic feasibility is securable if plus DR settlement and hydrogen sale price are more than 7.08¢/kWh and 8.3USD/kg or 6.25¢/kWh and 8.6USD/kg, respectively. For this end, continuous technical development and policy support for hydrogen system and plus DR are required.

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