• 한국태양에너지학회 논문집
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• 제29권1호
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• pp.1-10
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• 2009

This study was carried out to evaluate the Life Cycle Cost(LCC) of three types of RTPV(Building Integrated Photovoltaic) systems-Glass plus Granite. Crystalline BIPV and See through Amorphous BIPV-which were vertically installed to generate the same power output(76 kW level). Initial investment costs. cost. savings and maintenance costs had been predicted during the period of analysing the LCC of three types of BIPV(Building Integrated Photovoltaic) systems installed for the purpose of evaluating the LCC. In case of cost savings, it had been analyzed by measuring the amount of electric power generated, reduction in lighting load and heat & cooling loads through simulation. From this analysis, it was predicted that the See-through amorphous BIPV offering cost saving advantages demonstrated the economical efficiency similar to the Class plus Granite when it is backed by more than 20 years of durability.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 가을 학술발표회 논문집
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• pp.339-346
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• 2004

This paper presents a method to minimize Life-Cycle Cost(LCC) of steel box girders. The LCC function considered in this paper includes initial cost, expected life-cycle maintenance cost and repair cost. A resistance force curve is derived from a condition grade curve of steel girders and optimal design of steel box girders is performed on the basis of derived resistance force curve. Also, in this paper annual costs of various case in LCC are compared and analyzed. It is concluded that the optimal design of steel box girders considering LCC by a presented method will lead to more economical and safer girders than conventional design.

• 설비공학논문집
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• 제17권6호
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• pp.596-604
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• 2005

This paper presents the work on evaluating the LCC (Life-Cycle Cost) of a heat pump system as unutilized energy system. The river water as an unutilized energy source was used for the heat source of heat pump system. LCC analysis is a concrete method for evaluating the economical efficiency of energy facilities of building. The present case study shows an example of adequate use of the LCC analysis on a heat pump system and conventional gas boiler and refrigerator for building heat supply. A life cycle of 20 years was used to calculated net present value of energy cost. Over a 20 year life cycle, the energy cost could be reduced by 612 million won if a heat pump system were used instead of a conventional boiler and an absorption refrigerator.

• 한국강구조학회 논문집
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• 제17권2호통권75호
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• pp.115-130
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• 2005

본 논문에서는 강상자형교 생애주기비용(Life-Cycle Cost: 이하 LCC) 최적설계에 미치는 간접비용의 영향에 관한 연구를 수행하였다. 강상자형교 LCC 최적설계를 위한 정식화는 초기비용, 기대복구(expected rehabilitation) 비용과 인적 혹은 물적 손실비용 등과 같은 기대비용 및 도로이용자비용, 그리고 사회-경제 손실비용을 등과 같은 간접비용(혹은 간접복구비용)을 고려하였다. 이와같은 정식화 모델을 이용하여 본 논문에서는 실제 2경간 연속 강상자형교(2@50m=100m)의 LCC 최적설계 문제에 적용하였고, 기존의 설계방법들과 LCC의 비용-효율성에 대해 비교 고찰하였다. 또한 본 논문에서는 LCC에서 큰 비중을 차지하는 간접비용이 강상자형교 LCC 최적설계에 미치는 영향을 고찰해 보기 위해 교량이 속해 있는 도로의 네트워크(우회도로수) 및 우회도로 조건(우회도로 차로수 및 길이), 교통량 등과 같은 교통조건의 변화에 따른 다양한 민감도 분석을 수행하였다. 수치해석의 결과 교통량, 우회도로수, 우회도로 차로수 등은 강상자형교의 LCC 최적설계에 민감한 영향을 미치는 것으로 나타났다. 따라서 향후 신설 강상자형교의 LCC최적설계시 간접비용에 중요한 영향을 미치는 교통조건이 중요한 인자로 고려되어야 할 것으로 판단된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 추계 학술발표회 제16권2호
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• pp.773-776
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• 2004

The so-called Life Cycle Cost (LCC) analysis on reinforced concrete bridge can provide useful information for initial design and maintenance plan of the RC bridge. This paper proposes an LCC prediction equation and a sensitivity analysis method for RC bridges. An LCC equation for the RC bridge which includes initial investment cost, maintenance cost, and demolition cost was derived and verified from the data for design and construction of an RC slab bridge. In order to solve uncertainty problem on actual discount rate and material characteristics in the analysis of LCC of concrete bridges, a sensitivity analysis method on the LCC using the Monte Carlo simulation technique was suggested.

• 대한조선학회논문집
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• 제51권6호
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• pp.451-458
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• 2014

The purpose of this study is to compare the economics between a diesel propulsion vessel and a LNG fuel propulsion vessel through the analysis of the present value using the LCC(Life Cycle Cost) method. This study is also to judge the economics for long-term operation of a LNG fuel propulsion vessel as a result of analysis about the equivalent uniform annual cost. In particular, LCC method was strengthened by sensitivity analysis based on combined interest rate which is considering discount rate and inflation rate simultaneously.

• 한국건설관리학회논문집
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• 제6권6호
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• pp.133-141
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• 2005

최근에 공동주택 건설사업을 위한 가치공학 및 생애주기비용(LCC)분석의 중요성이 대두됨에 따라, 대형 건축물의 건설사업에서 가치공학 및 생애주기분석을 위한 이론적 모델, 표준지침 및 소프트웨어 등이 개발되어지고 있다. 그러나 현재까지도 실질적인 과거 보수이력데이터의 부재로 인한 VE 및 LCC분석 결과에 대한 신뢰수준이 미흡하다. 본 연구에서는 공동주택의 건설사업에 대한 합리적인 투자의사결정과 설계대안선정을 위한 시간의존적 LCC분석에 의한 가치분석 방법론을 제시하였다. 제안된 방법론은 과거이력데이터의 불확실성과 분석대안의 가치분석을 보다 합리적으로 고려하기 위한 시간의존적 생애주기비용 모델과 퍼지로직에 의한 성능평가기법과의 상관관계를 규명하였다. 또한, 제시된 시간의존적 생애주기비용 모델과 가치분석 절차의 타당성을 검토하기 위하여 실제대상사업에 적용하였다. 본 연구에서 제안된 방법론은 공동주택 건설사업에서의 설계대안 선정, 생애주기 비용 평가 및 합리적인 예산의 분배 등에 크게 기여할 것으로 기대된다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.1497-1502
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• 2009

The present study has been conducted economic analysis of heat storage type ground source heat pump system(HSGSHP) and normal ground source heat pump (GSHP) and central boiler system with individual air conditioning facility which are installed at the same building in the shared an apartment house. Cost items, such as initial construction cost, annual energy cost and maintenance cost of each system are considered to analyze life cycle cost (LCC) and simple payback period (SPP) with initial cost different are compared. The initial cost is a rule to the Government basic unit cost of production. LCC applied present value method is used to assess economical profit of both of them. Variables used to LCC analysis are prices escalation rate and interest rate mean values of during latest 10 years. The LCC result shows that HSGSHP (1,351,000,000won) is more profitable than central boiler system with individual air conditioning facility by 86.7% initial cost. And SPP appeared 8.0 year overcome the different initial cost by different annual energy cost.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 가을 학술발표회 논문집
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• pp.150-156
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• 2004

Though the concept of Life-Cycle Cost (LCC) itself is not new, its effectiveness for planning, design, rehabilitation and maintenance/management of civil infrastructures is becoming increasingly recognized. For the decision problems as in the case of the LCC of plant facilities, equipments, bridge decks, pavements, etc., the Life-Cycle Cost Analysis (LCCA) is relatively simple, and thus its practical implementation is rather straightforward. However, when it comes to major infrastructures such as bridge, tunnels, underground facilities, etc., the LCCA problem becomes extremely complex because lack of cost data associated with various direct and indirect losses, and the absence of uncertainty data available for the assessment as well. As a result, the LCC studies have been largely limited only to those relatively simple LCCA problems of planning or conceptual design for making decisions. Accordingly, in the recent years, the researchers have pursued extensive studies on the LCC effectiveness mostly related to LCC models and frameworks for civil infrastructures. Moreover, recently the demand on the practical application of LCC effective decisions in design and maintenance is rapidly growing unprecedently in civil engineering practice. Indirction cost is very important on LCC formulation. But that is very difficult and complicate the estimation every LCC. The objective of this paper is to suggest efficient regression model for the estimation of indirect cost approach to the practical application of LCC for the design and rehabilitation of civil. infrastructures considering traffic, traffic network, detour condition, and workzone condition. In this paper, it performed the sensitivity analysis and correlation analysis of parameter for development of regression model of inflection cost.

• 한국건설관리학회논문집
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• 제5권2호
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• pp.181-193
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• 2004

수도건설사업은 공용이후단계에서 소요되는 $운영\cdot유지관리비용$ 중에서 기계설비 및 관로시설이 대부분을 차지하는 대표적인 플랜트시설로 구성되므로 일반적인 토목시설물의 LCC모델과 차별화 되어야 할 것이다. 따라서 본 연구에서는 수도건설사업에 적합하도록 비용분류체계를 제시하고, 이에 따라 수도시설의 확률적 LCC분석 모델을 개발하였다. 또한, 설계VE 활동시 기초가 되는 설계VA의 절차를 실무활용도 측면을 고려하여 개선된 설계VA절차를 제시하였다. 제시된 설계VA절차와 확률적 LCC분석모델을 사용하여 실제 건설사업의 설계VE활동에 있어 송수관로의 적정 선형 선정에 적용하였다. 제안된 수도건설사업의 설계VA 및 확률적 LCC분석모델은 향후 수도건설사업의 $경제적\cdot가치혁신적$ 대안선정과 유지관리비 예산추정 및 적정예산 배정에 매우 유용하게 활용될 수 있을 것이다.