• Title/Summary/Keyword: Payback Period

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An Application Study on the Actual Site for Using Waste Heat (폐열을 이용한 열공급 실증 연구)

  • 이덕기;박수억;이승진
    • Journal of Energy Engineering
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    • v.10 no.4
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    • pp.327-334
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    • 2001
  • Heat is wasted by unconcern in industrial complex. This paper presented for using waste heat, which investigated step by step from searching waste heat to starting construction before and directly applied for the using waste heat in the actual site. Especially, using heat is assessed by investigation of heat supply and demand. Design of heat transportation system was made base on analysis of heat balance between demand and supply, which was analyzed by economical efficiency and property. Payback-period on investment was 1,909 years that was comparatively a short period of time in assessment.

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Promoting Uncertain Exploration : A Case Study (불확실한 탐험을 촉진하는 방법 : 사례연구)

  • Ha, Seongwook
    • Knowledge Management Research
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    • v.10 no.1
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    • pp.53-70
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    • 2009
  • This study empirically explored what promotes exploration, through a case analysis of a Korean SME (small and medium sized enterprise), based on the research framework which focuses on the identification and the selection of exploratory NPD (new product development) alternatives, and the accumulation of novel capabilities in new technology domains. The learning process of the exploratory NPD project described is as follows. The identification barrier of exploratory NPD project is relatively low. Constructive crisis is germane to selecting exploratory NPD alternatives and to enduring the long payback period. New separated R&D unit is likely to implement the exploratory NPD project. The length of the gestation period of the exploratory NPD project is related with the level of the conflict between old members and new members. This study identified several antecedents of the exploratory NPD project. Prior success promotes the identification process of the exploratory NPD projects. Constructive crisis is related with CEO's personal characteristics such as future oriented and proactive personality. The proactive involvement and persuasion of CEO are germane to reducing the conflict between old and new members and to the success of the exploratory NPD project. Based on the results, this study discusses several implications and future research directions.

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A Mathematical Programming Method for Minimization of Carbon Debt of Bioenergy (바이오에너지의 탄소부채 최소화를 위한 수학적 계획법)

  • Choi, Soo Hyoung
    • Clean Technology
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    • v.27 no.3
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    • pp.269-274
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    • 2021
  • Bioenergy is generally considered to be one of the options for pursuing carbon neutrality. However, for a period of time, combustion of harvested plant biomass inevitably causes more carbon dioxide in the atmosphere than combustion of fossil fuels. This paper proposes a method that predicts and minimizes the total amount and payback period of this carbon debt. As a case study, a carbon cycle impact assessment was performed for immediate switching of the currently used fossil fuels to biomass. This work points out a fundamental vulnerability in the concept of carbon neutrality. As an action plan for the sustainability of bioenergy, formulas for afforestation proportional to the decrease in the forest area and surplus harvest proportional to the increase in the forest mass are proposed. The results of optimization indicate that the carbon debt payback period is about 70 years, and the carbon dioxide in the atmosphere increases by more than 50% at a maximum and 3% at a steady state. These are theoretically predicted best results, which are expected to be worse in reality. Therefore, biomass is not truly carbon neutral, and it is inappropriate as an energy source alternative to fossil fuels. The method proposed in this work is expected to be able to contribute to the approach to carbon neutrality by minimizing present and future carbon debt of the bioenergy that is already in use.

Study on the Power Performance on WindPRO Prediction in the Southeast Region of Jeju Island (제주 남동부 지역을 대상으로 한 WindPRO의 발전량 예측에 관한 연구)

  • Hyun, Seunggun;Kim, Keonhoon;Huh, Jongchul
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.184.1-184.1
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    • 2010
  • In order to research the way to evaluate wind resource without actual Met Mast data, this paper has been carried out on the southeastern region of Jeju island, Korea. Although wind turbine has been an economical alternative energy resource, misjudging the prediction of lifetime or payback period occurs because of the inaccurate assessment of wind resource and the location of wind turbine. Using WindPRO(Ver. 2.7), a software for wind farm design developed by EMD from Denmark, wind resources for the southeastern region of Jeju island was analyzed, and the performance of WindPRO prediction was evaluated in detail. Met Mast data in Su-san 5.5Km far from Samdal wind farm, AWS in Sung-san 4.5km far from Samdal wind farm, and Korea Wind Map data had been collected for this work.

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A Case Study on the Engineering Economic Decision for Receiving Orders in Automotive Parts Industry (자동차부품 수주를 위한 투자타당성 분석방법 개선 사례연구)

  • Kim, Jin-Wook;Jeong, Heon-Gyeong
    • IE interfaces
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    • v.20 no.3
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    • pp.267-276
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    • 2007
  • When a company makes a decision on an investment for a new product as a source for a new program, it is not easy for them to take a proper decision-making process in this highly volatile market. There could be several ways to make an investment decision on a new program. A company needs to choose the most suitable way of investment which is reflected current corporate circumstances and potential risks. We check up the process of the engineering economic decision in a automotive part manufacturing company. We define the gap between the theory and practice on engineering economic decisions. We present advices to make a decision desirably.

Economic Evaluation of Early Detection System for Warranty Issues (품질보증 이슈 조기감지 시스템의 경제성 평가)

  • Jung, Sung-Hwan
    • Journal of Korean Society for Quality Management
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    • v.40 no.1
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    • pp.39-48
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    • 2012
  • An early detection system for warranty issues periodically collects customers' claim data and automatically reports alarms about emerging issues based on statistical algorithms. It helps companies to reduce an issue definition time and save the handling cost of warranty claims. This paper provides an evaluation framework to validate the economic effect of an early detection system project. For this purpose, we present economical index of a project with explicit formulas such as ROI(return on investment), PP(payback period), NPV(net present value), PI(profitability index) and IRR(internal rate of return) and analyze the sensitivities of the index according to the variation of project input parameters. The proposed analysis framework is expected to be used for evaluating economic values of various system integration projects.

Economic Assessment and Application of AHP for Determining the Design of Assembly Line for the Lens Module of Mobile Phone (휴대폰 렌즈모듈 조립라인 설계안 결정을 위한 경제성 분석 및 AHP응용)

  • Moon, Dug-Hee;Lee, Geun-Hyun;Song, Jun-Yeob
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.4
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    • pp.509-515
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    • 2011
  • When a manufacturing system is designed, various kinds of evaluation methods are used for selecting the best alternative. Net present value, inner rate of return and payback period are popular quantitative measures for the economic assessment, but other qualitative measures should be considered for evaluation. The analytic hierarchy process(AHP) has been used as the popular method for the multi criteria decision making problem that considers both quantitative and qualitative criteria. This paper explains the process of economic assessment, and how to use the AHP for evaluating the designs of the assembly lines for lens module installed in mobile phone.

A Case Study on the Installation and Operation of the Standing Column Well Method (우물관정형(SCW공법) 지열히트펌프 시스템의 설치 및 운영사례)

  • Na, Sang-Min;Park, Si-Sam;Park, Jong-Hun;Rhee, Keon-Joong;Kim, Tae-Won
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.592-595
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    • 2009
  • In recent years, geothermal heat pump (GHP) systems have become increasingly popular for heating and cooling in buildings. The Standing Column Well (SCW) method is one of the most efficient GHP system. Because it use groundwater for heat transfer material. In SCW systems, water is re-circulated between the well and the building (heat pump). It is only a short time since this method has been applied in domestic. So we have to refer to the developed countries' guides and manuals of SCW. In this paper, several design and construction points of SCW method are filed. We used real operation data of SCW system at Chong-Ju Univ. site for economical efficiency analysis. As a result, the payback period of Chong-Ju Univ. site is calculated at 7.23 years.

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Economic Feasibiltiy Analysis of Renewable Energy of Green Home Policy (그린홈사업을 위한 신재생에너지 기술의 경제적 타당성 평가)

  • An, Hyung-Jun;Heo, Eun-Nyeong
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.196-199
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    • 2009
  • Korean government decided to give a subsidy for renewable energy system of green home. This policy will make an appeal to consumers. But For success of this policy, Economic benefit of consumer is essential. In this study, benefit and cost is seperated to consumer part and government part, respectively. consumer's benefit is energy saving and asset value increment. Consumer's cost is real input money except government's subsidy. Government's benefit is consist of energy import reduction, carbon discharge reduction and new production increment, As a result, the government subsidy will not so enough to activate the green home. PV system for the korean general apartment has the payback period of 19 years. So, For the dissemination of renewable energy of green home, more strong subsidy policy and more economic technoloy development is requested.

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An Economic Feasibility Analysis of the HAPS Services in Korea

  • Ahn, Jae-Kyung;Kim, Jong-Hwa;Lee, Deok-Joo;Ahn, Do-Seob;Ku, Bon-Jun
    • Satellite Communications and Space Industry
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    • v.13 no.1 s.28
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    • pp.118-124
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    • 2006
  • HAPS(High Altitude Platform Station) which is defined as a station located on an object at an altitude of 20 to 50 km and at a specified, nominal, fixed point relative to the earth is promising technology capable of providing broadband multimedia services. In this study, economical aspects of HAPS service are analyzed by estimating the revenue and costs incurred by the service. To evaluate the profitability of HAPS service, the number of subscribers is estimated and then the net present value (NPV), payback period, and the rate of return on investment (ROI) are calculated under various scenarios

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