• 제목/요약/키워드: AMOUNT OF UTILITY

검색결과 181건 처리시간 0.026초

환경친화적 CFB 보일러 입자재순환 장치의 고체량 분배 특성 (Characteristics of Splitting Solid Amount by Friendly Environmental CFB Boiler's Particle Re-circulating Device)

  • 김유석;황재동;최용준;문길호;선도원;배달희
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 추계학술대회
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    • pp.1756-1760
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    • 2004
  • Circulating Fluidized-Bed (CFB) boilers which have been operated in Korea were manufactured by the design technology of foreign leading companies. As they are not active to transfer their technology, domestic companies don't have the enough ability to design it independently yet. Doosan Heavy Industries & Construction Co. Ltd. and Korean Institute of Energy Research are trying to develop and improve the particle re-circulating device among the components of CFB boiler. Our purpose is to control the amount of particles leaving the re-circulating system by adjusting utility air and reuse the heat of circulating particles. The results of experiments with cold model system show that a fluidization state in the particle re-circulating device is very stable when the amount of utility air is supplied to its wind box with 2.29 times of minimum fluidization velocity. Also the amount of particles entering the riser don't increase linearly when the amount of utility air is supplied over 2.5 times of minimum fluidization velocity. Now we are testing its functional run with the hotstate experiment set-up.

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GIS 기반 불투수율 산정방법론을 활용한 강우유출수 부담금 모의산정 방안 연구 (A Study on the Calculation of Stormwater Utility Fee Using GIS based Impervious Surface Ratio Estimation Methodology)

  • 유재현;김계현;최지용;이철용
    • 한국물환경학회지
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    • 제37권3호
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    • pp.157-167
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    • 2021
  • Korea needs to develop a rational system to separate stormwater utility fee from current sewerage fee. In this study, the scenario for calculating stormwater utility fee of Bupyeong-gu was suggested and the results were considered. For this purpose, the application of stormwater utility fee overseas and current domestic system were analyzed. A three step calculating scenario considering suitable domestic situation and impervious surface area was suggested. Water, sewerage usage, and hydrant data were collected. The total amount of water and sewerage fees for land use were calculated. The sewerage fee of Bupyeong-gu for the year 2014 was 21,685,446,578 won. Assuming that 40% of this amount was the cost associated to stormwater, the result showed that the fees for residential area in third step decreased by 0.77% compared to that of the first step. For commercial area, the stormwater utility fee decreased by 36.87%. For industrial area, although the consumption of water was similar to that of commercial area, the stormwater utility fee increased by 8.35%. For green area, the fee increased by 37.46%. This study demonstrated that the calculation of actual stormwater utility fee using impervious surface map and impervious Surface Ratio Estimation Methodology developed in previous studies is feasible.

Introducing a New Urban Utility Index Concept that Combines Urban Growth and Disasters

  • Koh, Munsung
    • Asian Journal of Innovation and Policy
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    • 제10권2호
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    • pp.236-248
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    • 2021
  • The objective of this study is to introduce the urban utility concept that combines urban growth and urban disasters in the aspect of a conceptual theory. While many studies focused on the dollar amount damaged from a disaster, it requires adding not just building damages or human body losses but also the quality of life satisfaction. An issue in measuring the quality of life satisfaction needs to introduce a proper mode quantifying it. This study introduces the urban utility change in measuring the negative impacts of a disaster on urban life, which has been rarely investigated. To identify urban utility, urban flooding that is a cross-sectoral agenda and important to both developed and developing countries was adopted to respond to its increased frequency and damages, encouraging governments to focus on flood control policies. By combining a literature review on urban utility and urban growth, this study defined the urban utility concept as a net benefit of a resident with earnings subtracting housing and commuting costs. The theoretical study also explained that urban utility and its components dynamically change as per urban growth and disasters that even reversely affect urban growth. Because the urban utility can be one of the useful indices to appreciate the relationship between a disaster and urban growth, it is highly expected to apply for similar disaster impacts on urban areas, including COVID-19 and various global warming issues.

전도도 센서를 이용한 송전선용 애자의 염분량 검출 (A Detection of Salt Contamination on the Transmission Line Insulator Using Conductivity Sensor)

  • 강연욱;심응보;권동진;곽주식;정창수;이옥배
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 춘계학술대회 논문집 유기절연재료 전자세라믹 방전플라즈마 일렉트렛트 및 응용기술
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    • pp.189-193
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    • 2002
  • Outage caused by contaminated insulator on high voltage transmission line and in substation is major concern for utility world-wide. To prevent these outages, it is necessary to develop an automatic salt contamination detecting device which provide the information about contamination level on utility for engineer to meet the emergency in advance. For that purpose, we have been developing an automatic salt contamination detecting device to monitor a salt amount on operating power utility area. In the salt contamination detecting device development, the most important thing is the sensor which can detect a salt amount and the understanding of sensor' s detecting principle. This paper describes the operating principle of the sensor and the experimental results about the detecting of salt amount. The results of this experiment wi1l be useful for detecting the contamination level.

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최선형 인터넷 서비스의 유틸리티와 과금 (Utility and Pricing for the Best Effort Internet Services)

  • 이훈;어윤
    • 대한전자공학회논문지TC
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    • 제39권6호
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    • pp.277-284
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    • 2002
  • 본 고에서는 최선형 인터넷 서비스에 대해서 대역공유량의 변화가 가지는 특성을 이론적으로 모델링하는 방법을 제안한다. 그리고 유틸리티에 기반한 요금정책을 제안하고 수치실험을 통해 제안방법의 의의와 효과에 대해 검토한다.

최선형 인터넷 서비스의 유틸리티와 과금 (Utility and Pricing for the Best Effort Internet Services)

  • 李焄;魚潤
    • 대한전자공학회논문지TC
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    • 제39권6호
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    • pp.19-19
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    • 2002
  • 본 고에서는 최선형 인터넷 서비스에 대해서 대역공유량의 변화가 가지는 특성을 이론적으로 모델링하는 방법을 제안한다. 그리고 유틸리티에 기반한 요금정책을 제안하고 수치실험을 통해 제안방법의 의의와 효과에 대해 검토한다.

글로벌 전자무역에서 SWIFT의 TSU BPO의 도입과 과제 (A Study on the Introduction and Implications of the Bank Payment Obligation under SWIFT's Trade Services Utility)

  • 채진익
    • 무역상무연구
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    • 제49권
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    • pp.409-434
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    • 2011
  • SWIFT has designed Trade Services Utility(TSU) to meet the new paradigm of electronic trade. The Trade Services Utility is a matching and workflow application that sits on the SWIFT network. The TSU is designed to help banks offer advanced supply chain services to their corporate customers who are involved in open account trading. Nowadays, the Bank payment obligation(BPO) can optionally be included in a baseline by mutual consent. The BPO is an irrevocable and conditional obligation of an obligor bank(buyers bank) to pay a specified amount to seller's bank according to an established baseline of a single TSU transaction. Therefore, SWIFT enables its customers to automate and standardise financial transactions, thereby lowering costs, reducing operational risk and eliminating inefficiencies from their operations. Whereas, Banks can use the core functionality of the Trade Services Utility to offer competitive services that complement existing services. But SWIFT need to come up with the measures of activating the TSU BPO. So, this paper is to introduce TSU BPO and check the measures for the activation of the TSU BPO under the electronic trade environment.

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다속성 효용이론에 근거한 조건부 가치측정법을 이용한 낙동강 하구의 환경가치 추정 (Using the Contingent Valuation Method Based on Multi-attribute Utility Theory to Measure the Environmental Value of the Nakdong-river Estuary)

  • 유승훈
    • Ocean and Polar Research
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    • 제29권1호
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    • pp.69-80
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    • 2007
  • This paper attempts to measure the environmental value of the Nakdong-river estuary, which is ecologically important but confronted with the threat of development. Especially, in order to elicit the environmental values of its four attributes, contingent valuation method(CVM) based on multi-attribute utility theory is applied and the CVM survey was rigorously designed to comply with the guidelines for best-practiced CVM studies. We surveyed a randomly selected sample of 400 and 350 households in Busan and six large cities(Seoul, Incheon, Daegu, Daejeon, Gwangju, and Ulsan), respectively and asked respondents questions in person-to-person interviews about how they would willing to pay for the estuary conservation and management program. Respondents overall accepted the contingent market and were willing to contribute a significant amount(2,457 won in Busan and 3,560 won in six large cities), on average, per household per year, which implies that there exists a large difference between the two. The aggregate values of the Nakdong-river estuary in Busan and six large cities amount to 2.92 and 22.32 billion won, respectively, per year. In addition, expanding the values to Korea produces 51.34 billion won per year. The quantitative values can be utilized in planning and decision-making about development versus conservation of the estuary.

CVM을 이용한 선상낚시체험 활동의 효용 가치 (Estimating the Utility Value of Boat Fishing Experience Activity Using CVM)

  • 강석규
    • 수산경영론집
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    • 제47권4호
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    • pp.45-55
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    • 2016
  • The purpose of this study is to estimate the utility value of boat fishing experience marine tourism activity in Jeju Island's Chagwido. The utility value is estimated by single bounded and double-bounded dichotomous choice contingent valuation method. The contingent valuation method is used to estimate economic values for all kinds of coastal ecosystem services. The method involves directly asking people, in a survey, how much they would be willing to pay for specific environmental services. So, the method has great flexibility, allowing valuation of a wider variety of non-market goods and services than is possible with any other non-market valuation technique. This study collects the effective 504 questionnaires from boat fishing experience tourists in Jeju Island's Chagwido. The results show that the average willingness to pay amount(WTP) is estimated to be about 17,000 Korea won by single bounded and double-bounded dichotomous choice contingent valuation method. This indicates that the utility value of boat fishing experience marine tourism activity is estimated to be about 17,000 Korea won in Jeju Island's Chagwido.

유틸리티 플랜트 모터/ 터빈 공정의 최적운전 (Optimal Operation of Motor/Turbine Processes in Utility Plant)

  • 오상훈;여영구
    • Korean Chemical Engineering Research
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    • 제45권3호
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    • pp.234-241
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    • 2007
  • 공장의 안정적인 운전과 경제성을 위해서는 유틸리티의 수급을 정확히 파악하고 공급하는 것이 중요하다. 모터/터빈 공정은 유틸리티 플랜트에서 수증기와 전력의 균형을 조절하여 주며 이의 최적 운전은 유틸리티 플랜트의 경제성에 지대한 영향을 미친다. 모터/터빈 공정의 분석을 위해서는 먼저 수증기 발생장치와 수증기 분배장치 전반에 대한 모델의 규명이 요구됨은 물론 제반 상황에 대한 운전지식이 필요하다. 유틸리티 관련 장치의 모델과 운전지식 베이스를 기반으로 구성되는 모터/터빈 운전 최적화 시스템에서는 다양한 등급의 수증기 헤더에서 요구되는 수증기 양이 변할 때 각 유틸리티 설비의 최적 운전조건을 제시하여 주며 수증기 요구량의 변화에 따라 유틸리티 펌프의 구동원이 적절하게 선택되고 이에 따라 전체 유틸리티 플랜트의 조업 경비도 절감할 수 있다.