• Title/Summary/Keyword: Initial cost

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Application analysis to a shared apartment house of heat storage type GSHP system with dual storage tank (이중 축열조를 갖는 축열식 지열원 히트펌프시스템의 노인공동주택 적용 분석연구)

  • Park, Jong-Woo;Lee, Sang-Hoon;Cho, Sung-Hwan
    • Proceedings of the SAREK Conference
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    • 2008.11a
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    • pp.27-32
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    • 2008
  • 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) which are installed at the same building in the shared an apartment house. Cost items, such as initial 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 (1,050,910,000won) is more profitable than GSHP by 68.9% initial cost. And SPP appeared 3.0 year overcome the different initial cost by different annual energy cost.

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Analysis of Initial Cost by Law Standards Alteration of Domestic Windows (국내 창호의 법적기준 변화에 따른 초기투자비 검토)

  • Jin, Su-Hwuy;Kim, Sam-Uel;Park, Yul
    • 한국태양에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.111-114
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    • 2011
  • Building components such as walls and windows causes the loss of many energy. The current of windows are using by the law standards that have been every reinforce the year from 2008. As the more reinforcement of legal standards, benefits of energy is possible to raising, But it is must to considered LCC and connectivity. In this study, the alteration for Law Standards is examining influence for initial cost. Accordingly, We are searches by using to windows products in domestic office building which choosing to window types in Law Standards, we are analyzed for initial cost of building out of the apartment.

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Application study of heat storage type GSHP system in Apartment building with central cooling and heating facilities using life cycle cost analysis (LCC 분석을 이용한 중앙공급식 공동주택의 수축열식 지열원 히트펌프시스템의 적용연구)

  • Lee, Sang-Hoon;Park, Jong-Woo;Cho, Sung-Hwan
    • Proceedings of the SAREK Conference
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    • 2009.06a
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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.

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High Performance Fiber Reinforced Cement Composites in Construction Field (건설분야의 섬유강화 시멘트 복합 신재료)

  • Hong, Geon-Ho;Kim, Ki-Soo;Han, Bog-Kyu
    • Composites Research
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    • v.19 no.1
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    • pp.43-48
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    • 2006
  • High performance fiber reinforced cement composites have better performances than traditional cement based materials, therefore, have been expected as new construction applications such as the materials for construction & bridge structure, repair and rehabilitation applications, anti-collapse applications, anti-noise applications etc. However, they have lots of the problems such as material design, fabrication method and structural analysis. Also, the most serious problems of High performance fiber reinforced cement composites have been expensive initial cost, lack of long-term exposure data. As a result, it is needed that the efforts for lowering the initial cost and accumulation of long-term exposure. There has been hardly assessment results of life cycle cost for HPFRCC in construction field, but some papers showed that total life cycle cost could be profitable if the initial cost could be reduced.

A Multi-objective Optimization Method for Energy System Design Considering Initial Cost and Primary Energy Consumption (초기투자비와 1차 에너지소비량을 고려한 에너지시스템의 다중최적 설계 방법론)

  • Kong, Dong-Seok;Jang, Yong-Sung;Huh, Jung-Ho
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.26 no.8
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    • pp.357-365
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    • 2014
  • This paper proposed a multi-objective optimization method for building energy system design using primary energy consumption and initial cost. The designing of building energy systems is a complex task, because life cycle cost and efficiency of building are determined by decisions of engineer during the early stage of design. Therefore, methods such as pareto analysis that can generate various alternatives for decision making are necessary. In this study, the optimization is performed using the NSGAII and case study was carried out for feasibility of the proposed method. As a result, alternative solutions can be obtained for the optimal building energy system design.

Optimum Safety Indices Based On Expected Total Cost Minimization (총기대비용 최소화원칙에 의한 최적신뢰성지수)

  • 이증빈;신형우;장석모
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1993.10a
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    • pp.216-223
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    • 1993
  • The safety factors of current standard code are considered to be not appropriate compared to design and construction practices, even this safety factors are not determined from probabilistic study but merely from experiences and practices. This study pripose the optimum safety indices based on expected total cost minimization using only three parameters, which are the level of the failure cost to the initial cost by improvement in safety, and the order of the initial cost function.

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Reliability-Based Optimum Design of High-Speed Railway Steel Bridges Considering Bridge/Rail Longitudinal Analysis and Bridge/Vehicle Dynamic Effect (교량/궤도 종방향 해석 및 교량/차량 동적영향을 고려한 고속철도 강교량의 신뢰성 최적설계)

  • Lee, Jong-Soon;Ihm, Yeong-Rok
    • Journal of the Korean Society for Railway
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    • v.12 no.6
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    • pp.974-982
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    • 2009
  • To improve the effectiveness and economics the bridge design methodology considering the bridge/rail longitudinal analysis and bridge/vehicle dynamic effect suggested in this study. The reliability-based Life-Cycle Costs(LCC) effective optimum design is applied to a 2-main steel girder bridge, 5$\times$(1@50m) for comparison with conventional design, initial cost optimization and equivalent LCC optimization. As a result of the optimum design based on reliability, it may be stated that the design of High-Speed railway bridges considering the bridge/rail longitudinal analysis and bridge/vehicle dynamic effect are more efficient than typical existing bridges and LCC optimization without respect to bridge/rail longitudinal analysis and bridge/vehicle dynamic effect. The result of optimization design considering the interaction, design methodology suggested in this study, is higher than result of initial cost optimization design in initial cost, but that has the advantage than result of initial cost optimization design in expected LCC.

Life Cycle Cost Analysis Models for Bridge Structures using Artificial Intelligence Technologies (인공지능기술을 이용한 교량구조물의 생애주기비용분석 모델)

  • Ahn, Young-Ki;Im, Jung-Soon;Lee, Cheung-Bin
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.6 no.4
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    • pp.189-199
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    • 2002
  • This study is intended to propose a systematic procedure for the development of the conditional assessment based on the safety of structures and the cost effective performance criteria for designing and upgrading of bridge structures. As a result, a set of cost function models for a life cycle cost analysis of bridge structures is proposed and thus the expected total life cycle costs (ETLCC) including initial (design, testing and construction) costs and direct/indirect damage costs considering repair and replacement costs, human losses and property damage costs, road user costs, and indirect regional economic losses costs. Also, the optimum safety indices are presented based on the expected total cost minimization function using only three parameters of the failure cost to the initial cost (${\tau}$), the extent of increased initial cost by improvement of safety (${\nu}$) and the order of an initial cost function (n). Through the enough numerical invetigations, we can positively conclude that the proposed optimum design procedure for bridge structures based on the ETLCC will lead to more rational, economical and safer design.

Economic Evaluation on Energy System Using River Water (하천수 이용 열원시스템의 경제성 평가)

  • Lee, Chulgoo;Kim, Jongdae;Im, Taesoon;Choi, Myungsik;Pang, Seungki;Ham, Heungdon
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.9 no.2
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    • pp.25-31
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    • 2013
  • It has become very important for unused energy to be used for building air conditioning. Economic evaluation on energy system by using river water as a heat source, which is one of the unused energy, was carried out. The floor area of the building and the distance between heat source equipment and river was assumed $50,000m^2$ and 200 m. General heat source system using absorption chiller-heater was used for comparing to the energy saving system, and payback period method using initial cost and running cost of two systems, was used to perform economic evaluation. According to development of high capacity of water source heat pump which is appropriate for using river water, initial cost for the system has been reduced. Payback period was about 3.2 years, and this period might be shortened if nation's economic support enact.

Feasibility study on waste heat utilization system in subway (지하철배열 이용 시스템의 경제성 평가)

  • Lee, Chul-Goo;Kim, Jong-Dae;Im, Tae-Soon;Pang, Seun-Gki;Ham, Heung-Don
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.7 no.1
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    • pp.59-64
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    • 2011
  • Feasibility study on energy saving system by utilizing exhausted heat from subway, which is one of the unused energy, was carried out. General heat source system using absorption chiller-heater was used for comparing to the energy saving system, and payback period method using initial cost and running cost of two systems, was used to perform economic estimation. Payback period was about ten years, and this period might be shortened if nation's economic support enact.