• Title/Summary/Keyword: Facility allocation

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A Study on the Power Management Algorithm of Centralized Electric Vehicle Charging System (중앙제어기반 전기자동차 충전시스템의 에너지관리 알고리즘에 관한 연구)

  • Do, Quan-Van;Lee, Seong-Joon;Lee, Jae-Duck;Bae, Jeong-Hyo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.3
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    • pp.566-571
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    • 2011
  • As Plug-in Hybrid Vehicle and Electric Vehicle (PHEV/EV) take a greater share in the personal automobile market, their high penetration levels may bring potential challenges to electric utility especially at the distribution level. Thus, there is a need for the flexible charging management strategy to compromise the benefits of both PHEV/EV owners and power grid side. There are many different management methods that depend on the objective function and the constraints caused by the system. In this paper, the schema and dispatching schedule of centralized PHEV/EV charging spot network are analyzed. Also, we proposed and compared three power allocation strategies for centralized charging spot. The first strategy aims to maximize state of vehicles at plug-out time, the rest methods are equalized allocation and prioritized allocation based on vehicles SoC. The simulation results show that each run of the optimized algorithms can produce the satisfactory solutions to response properly the requirement from PHEV/EV customers.

A Simple Model for RAM Analysis and Its Application to DUPIC Fuel Fabrication Facility

  • Ko, Won-Il;Park, Jong-Won;Lee, Jae-Sol;Park, Hyun-Soo
    • Proceedings of the Korean Nuclear Society Conference
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    • 1996.05b
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    • pp.505-510
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    • 1996
  • A simple model for RAM (Reliability, Availability and Maintainability) analysis and its computer code are developed for application to DUPIC fuel fabrication system. The approach is obtained by linking the allocation model (top-down method) to bottom-up method for RAM analysis. As a result, the availability requirement of subsystem, as well as the buffer storage requirement between processes, are evaluated for the DUPIC facility..

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A study on Locational and Regional Pattern of Leisure Facilities at Kangnam-gu, Seoul (서울시의 활동여가시설의 입지유형에 관한 연구 - 강남구를 중심으로 -)

  • Choi, Woun-Sik;Kim, Min
    • Journal of the Korean Regional Science Association
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    • v.10 no.2
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    • pp.17-29
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    • 1994
  • This study attempts to examine the regional distribution and the locational pattern of leisure facilities at Kangnam-gu in Seoul. For the convenience of the analysis the facilities are classified into public and private sector and then the facilities are classified into 11 types: mineral spring resort, play ground, neighborhood park, swimming pool, gymnasium, bowling, pingpong, aerobic, golf practice, health, and billiard facilities. For the purpose data was collected from statistical yearbook in 1993 and lists of registered facility at department of living physics of Kangnam-gu office. The data of the density of facilities and the opportunity of facilities per facilities type and per region are analysed with the technology of GIS. Results may be summarized as follows. First of all, correlation between the results of Location-Allocation model and the results of Interaction model is very high. Secondly, on comparing the density of facilities with the opportunity of the facility use per eleven facility types, three discrete spatial pattems are found. The mineral spring resort facility type with the highest unbalanced density and opportunity of facility use is to be found. Play ground, neighborhood park, swimming pool, gymnasium, bowling, pingpong, and aerobic facility types have the high unbalanced density and opportunity of facility use. The golf practice, health, and billiard facility types have spatially balanced density and opportunity of facility use. Thirdly, as comparing the density and the opportunity of the facility use per 'dong' administration unit, the spatial patterns of the public and the private facilities are different in density of the facility use and otherwise two are similar in the opportunity of the facility use. Fourthly, patterns of facilities users have different charateristics based on facility use time, expense, residence, and access time and four regional patterns are to be found ; user favorable, facility profitable, user balanced, and unfavorable.

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Assessment of GHG Reduction Strategy - A Case of Environmental Facilities of Incheon City - (온실가스 감축 전략의 성과평가 - 지자체 환경기초시설 사례 -)

  • Jang, Jong-Ok;Lee, Sung Wook;Kim, Jong Dae
    • Journal of Environmental Science International
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    • v.26 no.4
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    • pp.509-519
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    • 2017
  • The study focuses on 32 environmental facilities in Incheon Metropolitan City, South Korea, categorizes them by sector: sewage treatment, wastewater treatment, incineration, landfill, water purification, and water supply. Their GHG reduction results are analyzed through quantitative and qualitative measures for 2012 to 2015. The study surveys and examines GHG reductions of the environmental facilities for two categories - facility operation and management. The findings are as follows: First, the GHG reduction rate, an emission-to-allocation ratio, from 2012 to 2015 is 89.67%. Second, GHG reductions coming from qualitative measures of facility management are even greater than those from quantitative measures of facility operation. Third, GHG reductions through facility operation are mostly attributable to overhauls, less use of facilities, resources recycling, process improvement rather than the betterment of fuels, facilities and energy efficiency. Fourth, higher reduction can be achieved by effective facility management, qualitative measures.

The cost allocation of Voice and data traffic in Mobile Telephone Network (이동망 음성 및 데이터 공유설비 비용배분 방안)

  • Jung Choong-young
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.8
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    • pp.1802-1809
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    • 2004
  • This paper discusses cost allocation model of common facilities in voice and data traffic of mobile telephone network. There are several methods to be considered including traffic, facility, revenue, Ramsey, and benchmarking in local loop unbundling for High Speed Internet. It is important to investigate the strength and weakness of each method. This paper reviews the theoretical literatures and compares the characteristics of each methodology. Also, case studies are employed to get the implications concerned. As a result, in the beginning, it is desirable to introduce 50:50 allocation method used in local loop unbundling in UK. Then, it is recommendable to apply the ratio allocation method as the quantities of voice and data traffic become equal.

Allocation of the skipper's attention depending on the longline fishing process of the coastal composite fishing vessel (연안복합어선의 연승조업과정에 따른 선장의 주의 배분)

  • KIM, Min-Son;HWANG, Bo-Kyu
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.58 no.2
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    • pp.175-184
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    • 2022
  • This study analyzed the allocation of the skipper's attention during fishing operation in the wheelhouse of a Korean coastal composite fishing vessel by using video observation. To summarize the results, the ratio of lookout, radar and GPS monitoring, which is essential for prevention of collision at sea, was significantly lower than that of other fishing operation due to the attention concentration on the work place during hauling line. In order to reduce exposure to risk of collisions due to concentration of attention to certain tasks such as line hauling, it is necessary to develop an alert system that can notify the approach of other ships or obstruction throughout the ship using information from radar or the automatic identification system. In addition, the order of attention allocation to devices and facilities obtained in this study is expected to be used as basic data for device or facility layout based on the principle of usage frequency in designing wheelhouse for coastal composite fishing vessels in the future.

A Study on the Allocation Planning of Community Based Elderly Welfare Facilities - Focused on Urban Area - (일상생활권을 고려한 지역밀착형 노인복지시설의 배치계획에 관한 연구 -도시지역을 중심으로-)

  • Jeon, Sung-Min;Kwon, Soonjung
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.15 no.4
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    • pp.33-43
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    • 2009
  • As a result of rapid aging speed in our society, many problems related to elderly people have happened in many parts of our society. Among them, supply for elderly housing is one of the biggest problems. To solve these problems, 'long-term care insurance' has been put in operation from July 2008. By the time of the insurance operation, Ministry of Health and Welfare is increasing facilities every year according to '10-year expending plan of Care service infra' from 2002. As a result, the supply rate of elderly facilities has been raised. But the differences of facility supply rate between regions are very high in some cases. Therefore older people who need care sometimes cannot get proper care services in some areas. In that case, the frail older people have to use other care facilities of other regions. This is not a proper situation from the point of "Aging in Place". In order to prevent that case, it is necessary to set up proper 'Daily Living Spheres' and establish elderly care plan for it. Considering the points above, this study proposes the size of 'Daily Living Spheres' for the elderly, the kind and amount of elderly care facilities in it for the construction of Community Based Elderly Care System.

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Development of Infrastructure Maintenance Map based on GIS Data for Efficient Budget Management

  • Changjun Lee;Taeil Park;Yongwoon Cha
    • International conference on construction engineering and project management
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    • 2024.07a
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    • pp.209-215
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    • 2024
  • Many developed countries, including Korea, are rapidly aged owing to years of use. Infrastructures such as roads, water, and sewage are Social Overhead Capital (SOC), which provide convenience to the nation and support national economic growth. Thus, continuous maintenance and investment are required because infrastructure deterioration is directly related to social effects, such as quality of life and safety. In addition, because infrastructure maintenance costs a lot of the budget, it is necessary to appropriate criteria for budget allocation, given assessing the condition of infrastructure. This study developed an Infrastructure Maintenance Map (IMM) based on a Geographic Information System (GIS) for infrastructure maintenance budgets and investment priorities. The IMM uses maintenance information for roads, bridges, water, and sewage, obtained from Bridge Management System (BMS), Pavement Management System (PMS) and facility data in South Korea. The IMM can calculate deterioration levels and maintenance costs of infrastructure repair methods. Maintenance priorities are also evaluated based on Multi-Attribute Utility Theory using the deterioration level, economic feasibility, and effect of facilities. This study contributes to easy decision-making regarding infrastructure investment priorities and maintenance budgeting to the status of facility on the 3D map by IMM.

An Optimization Algorithm for the Two-Echelon Capacitated Facility Location Problem (용량 제약이 있는 이계층 설비 입지선정 문제의 최적화 해법)

  • Kim Eun Jeong;Gang Dong Hwan;Lee Gyeong Sik;Park Seong Su
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2003.05a
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    • pp.137-144
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    • 2003
  • We consider Two-echelon Single source Capacitated Facility Location Problem (TSCFLP). TSCFLP is a variant or Capacitated Facility Location Problem (CFLP). which has been an important issue in boa academic and industrial aspects. Given a set or possible facility locations in two echelons (warehouse / plant), a set or customers, TSCFLP is a decision problem to find a set or facility locations to open and to determine an allocation schedule that satisfies the demands or the customers and the capacity constraints or the facilities, while minimizing the overall cost. It ran be shown that TSCFLP Is strongly NP-hard For TSCFLf, few algorithms are known. which are heuristics. We propose a disaggregated version or the standard mixed integer programming formulation or TSCFLP We also provide a class or valid Inequalities Branch-and-price algorithm with rutting plane method Is used to find an optimal solution Efficient branching strategy compatible with subproblem optimization problems Is also provided. We report computational results or tests on 15 randomly generated instances.

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ASSESSMENT OF ACTIVITY-BASED PYROPROCESS COSTS FOR AN ENGINEERING-SCALE FACILITY IN KOREA

  • KIM, SUNGKI;KO, WONIL;BANG, SUNGSIG
    • Nuclear Engineering and Technology
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    • v.47 no.7
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    • pp.849-858
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    • 2015
  • This study set the pyroprocess facility at an engineering scale as a cost object, and presented the cost consumed during the unit processes of the pyroprocess. For the cost calculation, the activity based costing (ABC) method was used instead of the engineering cost estimation method, which calculates the cost based on the conceptual design of the pyroprocess facility. The calculation results demonstrate that the pyroprocess facility's unit process cost is $194/kgHM for pretreatment, $298/kgHM for electrochemical reduction, $226/kgHM for electrorefining, and $299/kgHM for electrowinning. An analysis demonstrated that the share of each unit process cost among the total pyroprocess cost is as follows: 19% for pretreatment, 29% for electrochemical reduction, 22% for electrorefining, and 30% for electrowinning. The total unit cost of the pyroprocess was calculated at $1,017/kgHM. In the end, electrochemical reduction and the electrowinning process took up most of the cost, and the individual costs for these two processes was found to be similar. This is because significant raw material cost is required for the electrochemical reduction process, which uses platinum as an anode electrode. In addition, significant raw material costs are required, such as for $Li_3PO_4$, which is used a lot during the salt purification process.