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

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

• 한국기후변화학회지
• /
• 제7권2호
• /
• pp.111-120
• /
• 2016

In this study, Techno-economic evaluation model for carbon capture & sequestration (CCS) technologies are reviewed. Based on a key parameters of Korea's electricity market, performance data of 10 MW-scale post-combustion $CO_2$ capture pilot plant in Boryong station, the cost of $CO_2$ avoided was evaluated followed by international guideline suggested by IEA CCS costing methods task force. The result showed that Korea's Electricity cost including CAPEX & OPEX of reference power plant is relatively low compared to OECD nations which lead to a lower CCS cost ($33USD\;t/CO_2$). And future work using newly evaluated CAPEX & OPEX data of power plant with/without CCS is recommended.

• KEPCO Journal on Electric Power and Energy
• /
• 제2권1호
• /
• pp.109-113
• /
• 2016

Techno-economic evaluation of Non-Capture $CO_2$ Utilization (NCCU) technology for the production of high-value-added products using greenhouse gas ($CO_2$) was performed. The general scheme of NCCU process is composed of $CO_2$ carbonation and brine electrolysis process. Through a carbonation reaction with sodium hydroxide that is generated from brine electrolysis and $CO_2$ of the flue gas, it is possible to get high-value-added products such as sodium bicarbonate, sodium hydroxide, hydrogen & chloride and also to reduce the $CO_2$ emission simultaneously. For the techno-economic study on NCCU technology, continuous operation of bench-scale facility which could treat $2kgCO_2/day$ was performed. and based on the key performance data evaluated, the economic evaluation analysis targeted on the commercial chemical plant, which could treat 6 tons $CO_2$ per day, was performed using the net present value (NPV) metrics. The results showed that the net profit obtained during the whole plant operation was about 7,890 mKRW (million Korean Won) on NPV metrics and annual $CO_2$ reduction was estimated as about $2,000tCO_2$. Also it was found that the energy consumption of brine electrolysis is one of the key factors which affect the plant operation cost (ex. electricity consumption) and the net profit of the plant. Based on these results, it could be deduced that NCCU technology of this study could be one of the cost-effective $CO_2$ utilization technology options.

• 산업경영시스템학회지
• /
• 제28권1호
• /
• pp.147-157
• /
• 2005

The purpose of this study is to develope the model of economy analysis and evaluation to justify the effect of economic feasibility for constructing ERP system in the company. Since the results for the evaluation of alternatives are influenced by the nature of capital and the circumstances, it is very difficult to evaluate the alternatives and it takes too much time to apply it in the field on account of many alternatives. This study suggests establishment and application of the model on economic analysis and evaluation regarding the nature of capital by using excel spread sheets.

• 수산해양기술연구
• /
• 제31권3호
• /
• pp.287-295
• /
• 1995

fishing boat is a specialized vessel which is intended to perform certain well defined tasks. Its size, deck-layout, carrying capacity and equipment are all related to its function in carrying out its planned operations. Therefore the process of fishing boat design is inherently combined with optimization of the design variables called the economic optimization criteria. Optimization then is a process in which minimum value of weight or cost is established through evaluation of consecutive designs in which one or more design parameters are varied. This paper is to study the basic-design of Stow-net fishing vessel in the Mok-Po region. The main task is developed the preliminary design model of engineering economic system in order to use optimization techniques from operation research the design problem needs to be expressed in terms of objective function and numerous constrains like : speed, fish hold capacity, fishing range, displacement and weight, ratio of main dimensions, etc. The objective function represents the criterion which is NPV such as the ratio of revene/cost. When using computers of limited capacity like P/C, the developed basic-design model of the economic optimization procedure must be simplified to V, Cb, L/B, Dv, Db and less than 15 constraint equations. The main conclusions of this study have attempted to show that economic considerations are essential in Stow-net fishing vessel basic design and operations, and that techno-economic evaluation is an important tool for the design of Stow-net fishing vessel in 69ton and 79ton.

• 공업화학
• /
• 제27권2호
• /
• pp.171-178
• /
• 2016

세계 각국은 석유자원의 고갈로 인한 고유가, 지구온난화 등의 환경문제를 해결하기 위하여 많은 노력을 하고 있다. 그중 기존 화석연료를 대체할 수 있는 재생 가능한 청정 에너지원으로 바이오 연료가 주목받고 있다. 그러나 기존의 바이오연료 생산기술은 식량자원인 사탕수수, 옥수수 등을 사용하므로 이를 대체하는 기술개발이 요구되고 있다. 이에 본 연구에서는 식량자원을 대체할 폐기물의 가스화와 혼합 알코올 합성공정이 연계된 간접 알코올 전환 공정의 기술 경제성 평가를 수행하였다. 국내에서 공급되는 바이오매스 폐기물 자원량을 고려한 2000톤/일 급의 전환 공정에서 매일 533000 L의 연료용 에탄올을 생산한다고 가정하였고 이를 위해 필요한 경제성 자료는 기발표된 자료들로부터 계산되어 경제성 분석에 이용되었다. 경제성 분석은 원금회수기간과 내부수익률(internal rate of return, IRR) 및 순현재가치(Net Present Value, NPV)로 진행되었으며, 원료비용과 초기 투자비, 주요 공정비용 및 에탄올 가격 변화, 운용비용의 민감도 분석을 진행하여 각 항목별 민감도를 고찰하였다.

• 한국경제지리학회지
• /
• 제12권1호
• /
• pp.19-37
• /
• 2009

우리나라의 테크노파크 조성사업은 지역의 기술혁신촉진, 산업구조 고도화 등을 위한 기업지원 플랫폼으로서 시작되었다. 1997년 6개를 시범사업으로 시작된 테크노파크는 현재 전국 15개 시도에 17개가 지정되어 창업보육, 시험생산, 교육 훈련 등의 다양한 기업지원서비스를 제공하고 있다. 지역혁신사업 추진체계의 개편과 "산업기술단지지원에 관한 특례법" 개정, 2단계 테크노파크 조성사업 추진은 테크노파크가 지역의 기술혁신거점기능을 수행하고, 기술기업을 육성하는데 있어 핵심적인 정책 제도 사업적 기반으로 작용하고 있다. 앞으로 테크노파크가 지역에서 기술혁신거점기능을 강화하고 기술 기업육성의 중심기관으로 자리 잡기 위해서는 산 학 연 관과의 네트워크 활성화, 지역산업육성의 기획기능 강화, 지역 중소기업 지원의 단일창구 역할정립 등의 과제해결이 필요하다.

• Advances in nano research
• /
• 제16권3호
• /
• pp.303-311
• /
• 2024

This paper conducts a thorough economic evaluation of integrating nanoparticles into concrete structures within the construction industry, aiming to elevate the material properties of concrete. Employing the Halpin-Tsai micromechanics theory for deriving the effective material properties of the nanocomposite concrete structure, the research investigates the nuanced impact of nanoparticles on various mechanical properties, including the modulus of elasticity, compressive strength, and their indirect effects on the percentage of reinforcement. Implementing the Euler theory to formulate the governing equation based on Hamilton's principle, the study delves into the pricing dynamics of nanoparticles and their influence on the overall cost structure of concrete structures. Notably, the findings reveal that a measured increase in the volume percentage of nanoparticles, up to 1%, results in a remarkable 78% improvement in elastic modulus and a substantial 142% reduction in armature percentage. Remarkably, from an economic perspective, the incremental cost associated with the integration of nanoparticles is relatively modest (around $1 per ton of concrete), considering the substantial enhancements in mechanical properties achieved.

• 산업공학
• /
• 제20권3호
• /
• pp.387-394
• /
• 2007

Numerous countries promote business programs to revitalize local economy, increase employment, and nurture high-tech industries. Recently, a number of business incubators have been established and operated with aims to adapt to changing environment and increase economic competitiveness in Korea. To give satisfactory results of governmental policy, the requirement to develop the evaluation model to support effective operations of business incubators using the objective and rational criteria is growing. The purpose of this study is to develop evaluation model in Business Incubator using Data Mining Process. We suggested the evaluation model of business incubator, 'Score-5 RS' consists of making evaluation factor process using weighted sum and 5-grade classification and analyzing process by Decision Tree algorithm.