• 산업공학
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• 제18권3호
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• pp.277-287
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• 2005

In this paper, we deal with a new techno-economic modeling and analysis for optical access networks. In deploying the fiber-to-the-home (FTTH) architecture, network planner needs to consider the following techno-economic issues: when do we need to upgrade existing local access network to FTTH network? how much do we invest to maximize profit? In order to answer these techno-economic questions, we need to consider the impact of emerging technologies and business environment. Toward this end, we develop a new techno-economic modeling to deal with the inherent complexity of technology evolution and cost economics. In particular, the new modeling approach provides us with an techno-economic analysis of technology alternatives such as ethernet passive optical network (E-PON) and wavelength division multiplex passive optical network (WDM-PON). In this analysis, we focus on the impact of critical factors such as the cost characteristic of proposed architecture and digital subscriber line (DSL) subscriber's churn-in to FTTH service and churn-out. We develop mixed integer-programming models for finding the evolution path of local access networks to broadband network architectures.

• Journal of Electrical Engineering and Technology
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• 제9권5호
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• pp.1501-1510
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• 2014

Low voltage direct current (LVDC) distribution system is a suitable techno-economic candidate which can create an innovative solution for distribution network development with respect to rural electrification. This research focuses on the use of LVDC distribution system to replace some of KEPCO's existing traditional medium voltage alternating current (MVAC) distribution network for rural electrification in South Korea. Considering the technical and economic risks and benefits involved in such project, a comparative techno-economic analysis on the LVDC and the MVAC distribution networks is conducted using economic assessment method such as the net present value (NPV) on a discounted cash flow (DCF) basis as well as the sensitivity analysis technique. Each would play a role in an economic performance indicator and a measure of uncertainty and risk involved in the project. In this work, a simulation model and a computational tool are concurrently developed and employed to aid the techno-economic analysis, evaluation, and estimation of the various systems efficiency and/or performance.

• 한국경영과학회지
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• 제28권1호
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• pp.115-129
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• 2003

This paper Is concerned with a new techno-economic model Ing of ATM based h19h-speed networks. Coupled with advances of technology, the rapid development of new telecommunication services significantly increases the magnitude of risk in making an Investment decision. Naturally, the success of techno-economic modeling depends on how effectively we manage underlying risk factors such as cost and technology To deal with risk factors, we need to rely on modern decision and risk analysis while Implementing mathematical optimization for solving a complex capacity expansion problem of telecommunication systems during the planning period. We provide a case study that will enhance our understanding of the techno-economic analysis for emerging telecommunication systems.

• Advances in Energy Research
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• 제3권3호
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• pp.167-179
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• 2015

This paper presents a techno-economic analysis of a partial repowering scheme for an existing 210 MW coal fired power plant by integrating a gas turbine and by employing waste heat recovery. In this repowering scheme, one of the four operating coal mills is taken out and a new natural gas fired gas turbine (GT) block is considered to be integrated, whose exhaust is fed to the furnace of the existing boiler. Feedwater heating is proposed through the utilization of waste heat of the boiler exhaust gas. From the thermodynamic analysis it is seen that the proposed repowering scheme helps to increase the plant capacity by about 28% and the overall efficiency by 27%. It also results in 21% reduction in the plant heat rate and 29% reduction in the specific $CO_2$ emissions. The economic analysis reveals that the partial repowering scheme is cost effective resulting in a reduction of the unit cost of electricity (UCOE) by 8.4%. The economic analysis further shows that the UCOE of the repowered plant is lower than that of a new green-field power plant of similar capacity.

• 공업화학
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• 제29권2호
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• pp.209-214
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• 2018

본 논문에서는 $300m^3\;h^{-1}$급 수소 생산을 위한 글리세롤 수증기 개질반응에 대해 기술 경제성 평가를 수행하였다. 상업용 공정 설계 프로그램인 Aspen $HYSYS^{(R)}$를 이용하여 글리세롤 수증기 개질반응에 대한 공정을 설계하였으며, 반응온도에 따른 수소 생산량의 차이를 비교 분석하였다. 또한, 항목별 경제성 평가, 민감도 분석, 현금흐름도를 통하여 경제성 평가를 진행하였으며, $300m^3\;h^{-1}$급 글리세롤 수증기 개질반응에서의 수소 생산 단가는 5.10 $ ${kgH_2}^{-1}$로 계산되었다. 수소 생산 단가에 영향을 끼치는 주요 인자를 파악하기 위해 민감도 분석을 실시하였으며, 수소 판매 단가에 따른 현금흐름도 분석을 통해 순현재가치, 할인회수기간, 현재가치율과 같은 다양한 경제성 인자를 파악하였다.

• 한국통신학회논문지
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• 제27권10C호
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• pp.921-932
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• 2002

이 연구는 통신시스템 운용대안을 평가하는 방법론을 개발한다. 제안하는 방법론은 계층요소 분석 기법과 의사 결정 분석 기법을 기반으로 개발되었고, PSTN 시스템에 적용해서 방법론의 효용을 평가한다. 운용대안 계층요소 분석은 시스템 운용 요소를 파악하고 요소 중요도를 분석하는 모형이다. 요소와 대안 사이 중요도 관계를 이용하여 대안 중요도를 구한다. 또한 의사결정 기법은 시스템 운용 비용요소를 파악하고, 비강요소별 불확실성 관계를 분석한다. 여기서 비용요소는 운용비, 유지비, 연구개발비로 나누고 비용값 변화에 따라 확률분석을 한다. 두 방법론을 적용하여 중요도와 비용을 기준으로 대안이 갖는 특성을 평가한다. 끝으로 요소 변화에 따른 민감도 분석을 수행하여 최적 대안 변화를 분석한다.

• 한국수소및신에너지학회논문집
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• 제32권5호
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• pp.417-429
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• 2021

Due to fossil fuel depletion and environmental pollution, H2 production from organic waste has received an increased attention. In this study, we present an integrated process for the H2 production from biogas and evaluate the economic feasibility and sustainability via rigorous techno-economic analysis (TEA) and life-cycle assessment (LCA). Through the TEA, we determine the minimum H2 selling price using discounted cash flow analysis and investigate the main cost drivers. The environmental impact of the proposed process is quantified via LCA.

• 한국가스학회지
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• 제24권5호
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• pp.65-73
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• 2020

본 연구에서는 재생에너지원의 에너지저장기술(Power to gas, P2G)로써 활용되는 수전해기의 가동률 향상과 산소 이용 극대화를 통해 경제성을 확보하기 위해서 수전해기에서 배출되는 산소를 바이오매스 가스화 공정에 공급하여 추가적인 수소 생산을 통해 수소 원가를 감소시키고, 재생에너지원의 출력 감소 시 수전해기를 바이오매스 가스화 공정의 산소 제조/공급 장치로 활용하는 공정을 제안하고, 이에 대한 정량적인 효율 분석과 경제성 분석을 수행하였다.

• Korean Journal of Chemical Engineering
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• 제35권12호
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• pp.2348-2354
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• 2018

We designed a conceptual model of the 2.3-BDO dehydration process using a hydroxyapatite-alumina catalyst and estimated its economic feasibility to predict the appropriate range of the purchase price of 2,3-BDO on commercial scale. The conceptual design and economic analysis can offer valuable information for the industrial application of 2,3-BDO because the most relevant studies have limitation in laboratory scale. Furthermore, the adequate range of 2,3-BDO price, in which the process has profitability, was investigated with the current market prices of 1,3-BD. The investigated price in terms of 2,3-BDO dehydration can pertain to estimation of the economic feasibility in 2,3-BDO production process.

• Advances in nano research
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• 제14권1호
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• pp.67-80
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• 2023

Economic investigation is one of the main issues regarding the design and production of small-scale structures. This paper concerns the creation, implementation, and economic aspects of the cross-section profile of small-scale structures regarding the dynamic response of the free and forced vibration behavior of spinning nanoscale beams based on big data analysis. According to the financial analysis, the three practical non-uniform functions of cross-sections are compared to the uniform beam in the same weight and the equal material used. The previous studies reported that the uniform beams are more stable and contain a better frequency response based on the mechanical analysis. Still, concerning the economic investigation, which means the considered structures should have equal length and have the same weight in the aspect of material used, the conclusion can be different from the mechanical aspect. Consequently, in the current paper, the dynamic response along with computer technology as well as the big data analysis of the free and forced vibration of the nanobeam regarding the economic shape of the cross-section is scrutinized.