• 제목/요약/키워드: Quantity of power consumption

검색결과 51건 처리시간 0.028초

전력사용량 기반의 새로운 부하제어 알고리즘 (An New Load Control Algorithms based on Power Consumption)

  • 김정욱
    • 전기학회논문지
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    • 제59권9호
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    • pp.1658-1662
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    • 2010
  • This paper presents an advanced energy saving algorithm in building. It is important to aggregate a various demand side resource which is surely controllable at the peak power time to reduce the energy cost. Previous demand side algorithm appropriate for building is based on peak power. In this paper, we develop the new energy saving algorithm to reduce the quantity of power consumption. The simulation results show that the proposed tem is very effective.

Ba-Ti-Si 세라믹 방전관의 오존 발생 특성 연구 (A Study on Ozone Generation Characteristic using Ba-Ti-Si Ceramic Tube)

  • 이동훈;박홍재;박재윤
    • 한국전기전자재료학회논문지
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    • 제16권7호
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    • pp.634-640
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    • 2003
  • This paper is to be researched into ozone generation character of Bi-Ti-Si type high dielectric yield ceramic catalyst discharge tube. And conditions of basic experiment are the outside diameter of discharge tube : 52 mm, the length of discharge tube : 350 mm, the frequence : 900 Hz, the temperature of cooling water : 25 $^{\circ}C$, quantity of flow : 5, 10, 20 l/min, pressure : 1.2, 1.4, 1.6 atm, and distance of discharge gap : 0.4, 0.6, 0.8 mm. Ozone generation characteristics were measured to consumption power. At quantity of flow : 20 l/min, discharge gap : 0.6 mm, pressure : 1.6, and consumption power : 150 W, Maximum ozone generation efficiency of 175 g/kWh was obtained. Maximum ozone generation efficiency was measured below the flow quantity of 20 l/min at below pressure of 1.6 atm. However, Maximum ozone generation efficiency was measured over the flow quantity of 20 l/min at over pressure of 1.6 atm.

농촌의 전력및 전기기기의 이용특성분석 (Analysis of the Utilization Characteristics of Electrical Power and Equipments on the Farms)

  • 박승우;류한열
    • 한국농공학회지
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    • 제17권4호
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    • pp.3943-3955
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    • 1975
  • The purposes of this study are to evaluate the utilization characteristics of electrical power consumption, to grasp the present trends in the use of electrical equipments, to estimate the demand factor and load factor being held, and to evaluate the efficiency of electical uses for the recently electrified farms cultivating paddy rice. For the purposes, 109 sample farms located in eleven villiages electrified in six different years from 1968 to 1973, were chosen at random and investigated on 35 items concerning to electrical uses and wiring systems. The survey was carried out in 1975, in the vinicity of Suweon city. The results are summarized as follows: i) The average annual power consumption on sample farms is considered to be low, being 242.9 Kwh. in 1974, and varied according to the different electrified year and size of cultivated land, respectively. It has significant positive correlation to the area of farm, too. ii) Between the number of year of electrical uses and the power consumption, there is very significant positive correlation, which could be expressed as Y=43.041+16.108 X, where X represents the number of years of electrical uses. The annual increment of power consumption is much greater at the beginning of the electrification than that at the later years, its average being approximately 20 percent. However, it is recommended that any estimation of long-term increments should be carefully investigated. iii) The monthly power consumption varies considerably throughout a year, in which the heaviest farm load occurs in November. Observing the seasonal variation of consumption, the winter-time is the heaviest season while the summer is the lowest. The result implies house lighting is chief contribution to the present electrical consumption on the farms. Comparing the variation of monthly consumption ratios between the sample farms and industries, the electrical uses on the farms are independant of the industrial uses, and further, the agricultural uses are of inverse pattern to the farms from the results that there is negative correlationship between them, iv) The number of electrical equipments used on the farms are occupied chiefly by lighting sources. Next to the lighting sources, household appliances of small quantity and some motors are used. The mean electrical quantity is about 1, 127.4 watt, which corresponds to about 37.6 per cent to the contracted quantity. The composition of quantity is chiefly occupied by the electrical motor of about 1.5 hp., single-phased. The number of the annual utilization hours of each equipment is tabulated in Table IV-5. In contradiction to the high utilization of lighting sources and small household appliances, the motor is poorly used for approximately 22 hours in a year. v) More than 55 per cent of farms want to purchase new electrical equipments such as small household appliances and electrical motors in their number. The impulse of purchasing such items is stimulated by the contacts to the mass media and their knowledge on such equipments. Consequently, the increase of electrical uses could be prompted by such trials as education and demonstration. vi) The demand and load factors on the farms vary considerably according to the greater variation of the power consumption, daily or monthly. The daily demand factor is 22.4 per cent and load factor 18.6 per cent, while the annual demand factor is 1.3 per cent and load factor 70 per cent approximately. Therefore, the low efficiency of construction cost requires re-evaluation of the present contracted quantity of 3 Kw. or increase of electrical uses. vii) The electrical energy on the farms devoted chiefly to lighten the farm residences does not contribute to the farm incomes. Consequently, the cost of electrical consumption presses considerably upon the farm economy. Therefore, there is great need to build up the electrical uses on the farms through the development of new works and techinques to utilize any electrical equipments on the production of farm products. Further more, such the development should be related to increase the actual income of the farm consumers.

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효율적인 에너지 소비를 위한 그리드 센서 네트워크 라우팅 알고리즘 (Grid Sensor Network Routing Algorithm for Efficient Power Consumption)

  • 김민제;장경식
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2009년도 추계학술대회
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    • pp.1026-1029
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    • 2009
  • 센서 네트워크는 센서 노드들이 배치된 후 충전이 사실상 어렵기 때문에 에너지를 효율적으로 사용하는 것이 중요하다. 이에 본 논문에서는 Modified-CBPER이 CBPER의 데이터 공고 패킷의 공고 범위를 줄여 전송 횟수를 감소함으로서 에너지 소비를 감소시킨 점에 착안하여 추가적으로 데이터 공고 범위를 줄여 에너지 소비 감소를 도모하는 방법을 제안한다. 제안하는 EM-CBPER(Enhanced Modified CBPER)은 데이터 요청을 하고 데이터를 전송하는 과정에서의 에너지 소비는 기존의 알고리즘들에 비해 다소 증가하나 전체 전송량에서 큰 비중을 차지하는 데이터 공고 패킷의 전송 횟수를 줄임으로서 전체적인 에너지 소비를 줄인다.

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동결농축법을 이용한 폐수처리시스템의 에너지 효율 향상에 관한 연구 (A study on energy efficiency improvement of waste-water treatment system by freeze concentration method)

  • 김정식;임승택;오철
    • Journal of Advanced Marine Engineering and Technology
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    • 제37권5호
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    • pp.467-476
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    • 2013
  • 동결농축법은 열역학적 효율이 높고 에너지 소비량이 작으며 처리수를 재활용할 수 있는 장점을 가지고 있다. 본 연구에서는 중소규모로 상용화 가능한 동결농축폐수처리시스템을 설계하고, 각 시스템의 에너지 소비효율과 일일처리량을 비교하여 시스템 개발방향을 제안하고자 하였다. 시스템을 완속운전시스템과 급속운전시스템으로 각각 모델링하고 해석을 통해 소비동력과 운전시간을 계산하여 비교한 다음 설계처리량에 따른 변화를 추가 검토하였다. 연구결과 급속운전시스템의 소비전력량비가 0.6 Wh/kg 만큼 다소 높으나 일일처리량은 19 % 증가하였으며, 설계처리량이 큰 시스템일수록 소비전력량비가 작아지고 일일처리량이 큰 결과를 얻었다.

데이터마이닝을 활용한 해군함정 수리부속 수요예측 (Naval Vessel Spare Parts Demand Forecasting Using Data Mining)

  • 윤현민;김수환
    • 산업경영시스템학회지
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    • 제40권4호
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    • pp.253-259
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    • 2017
  • Recent development in science and technology has modernized the weapon system of ROKN (Republic Of Korea Navy). Although the cost of purchasing, operating and maintaining the cutting-edge weapon systems has been increased significantly, the national defense expenditure is under a tight budget constraint. In order to maintain the availability of ships with low cost, we need accurate demand forecasts for spare parts. We attempted to find consumption pattern using data mining techniques. First we gathered a large amount of component consumption data through the DELIIS (Defense Logistics Intergrated Information System). Through data collection, we obtained 42 variables such as annual consumption quantity, ASL selection quantity, order-relase ratio. The objective variable is the quantity of spare parts purchased in f-year and MSE (Mean squared error) is used as the predictive power measure. To construct an optimal demand forecasting model, regression tree model, randomforest model, neural network model, and linear regression model were used as data mining techniques. The open software R was used for model construction. The results show that randomforest model is the best value of MSE. The important variables utilized in all models are consumption quantity, ASL selection quantity and order-release rate. The data related to the demand forecast of spare parts in the DELIIS was collected and the demand for the spare parts was estimated by using the data mining technique. Our approach shows improved performance in demand forecasting with higher accuracy then previous work. Also data mining can be used to identify variables that are related to demand forecasting.

조명제어시스템을 위한 효율적인 계측 및 검증(M&V) 기법 연구 (A Study on the Effective M&V Method for the Lighting Control System)

  • 김정욱;부창진;김정혁;오성보;김호찬
    • 에너지공학
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    • 제20권3호
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    • pp.216-223
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    • 2011
  • 본 논문에서는 다양한 공장과 빌딩에서 조명제어시스템을 대상으로 계측 및 검증(M&V) 방법을 사용하여 효율적인 에너지 절약 방법을 제시한다. 에너지 가격을 줄이기 위해서는 전력피크시간에 제어가능한 다양한 수요자원을 고려하는 필요하지만, 일반적으로 빌딩에서 고려되는 수요자원은 피크전력이다. 본 논문에서는 M&V 방법을 사용하여 전력소비량을 줄일 수 있는 새로운 에너지절약방법을 제안하고 현장계측시스템을 구성하고 시뮬레이션 방법을 통해 제안된 방법이 효과적임을 확인한다.

LCD TV의 소비 전력 절감을 위한 백라이트 LED의 효율적인 제어에 관한 연구 (A Study on Efficient Control of Backlight LED for Reduction of Power Consumption of LCD TV)

  • 강성진;정혜동
    • 정보통신설비학회논문지
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    • 제9권3호
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    • pp.80-85
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    • 2010
  • In this paper, we present an algorithm for efficient control of backlight LED in order to reduce the power consumption of LCD TV. In addition, a pragmatic implementation method is presented. In conventional local dimming control, backlight LEDs of LCD TV are divided into $M{\times}N$ blocks. And, the proper luminance for each block is computed according to input image and used for dimming control. But, LED light of each block is diffused and affects the neighboring blocks, so that luminance of each block becomes larger than that of intent. In the proposed algorithm, dimming control values are reduced by the amount of quantity affected by the neighboring blocks using light spread function, resulting in additional reduction of power consumption.

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세라믹(Ba-Ti-Si) 방전관의 오존발생특성 (A Study on Ozone Generation Characteristic Using Ba-Ti-Si Ceramic Tube)

  • 이태관;이동훈
    • 대한환경공학회지
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    • 제28권5호
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    • pp.543-548
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    • 2006
  • 본 논문은 Ba-Ti-Si형 고유전체 세라믹촉매방전관의 오존발생특성에 관해 연구이다. 기본적인 실험조건은 방전관의 외부직경 52 mm, 방전관 길이 350 mm, 전원 주파수 900 Hz, 냉각수 온도 $25^{\circ}C$, 유량 5, 10, 20 L/min, 방전관 내부 압력 1.2, 1.4, 1.6 atm 그리고 방전관과 전극 사이는 0.4, 0.6, 0.8 mm이다. 그리고 실험결과의 특성들은 오실로스코프상에 나타난 리사쥬 도형의 값을 환산한 소비전력으로 유량 20 L/min, 방전간격 0.6 mm, 압력 1.6 atm 그리고 반응기 내의 무성방전에 사용된 소비전력 150 W에서 최대 오존발생효율 175 g/kWh를 얻을 수 있었다. 그리고 최대 오존발생효율 영역은 1.6 atm 이하의 압력에서는 유량 20 L/min 이하에서 측정되었다. 또한 최대 오존발생효율의 영역은 1.6 atm 이상의 압력에서는 유량 20 L/min 이상인 경우에 오존발생 효율이 높아졌다.

대학교 기숙사의 전력소비량과 BIPV시스템의 발전효율·부하부담율에 관한 연구 (A Study on the Power Consumption and the Generation Efficiency and Load Rate of the Building Integrated Photovoltaic System in University Dormitories)

  • 서원덕;이강국;홍원화
    • KIEAE Journal
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    • 제11권6호
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    • pp.87-93
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    • 2011
  • This study examines building's power consumption unit cost and Building Integrated Photovoltaic (BIPV)'s generation efficiency and load rate with the subjects of university dormitory buildings in order to suggest foundational data for new and recycled energy use and management to plan and operate university dormitories afterwards. Thereby, this research gained the following findings. 1. The quantity of solar radiation and efficiency change in the BIPV system applied to the research subject buildings after the lapse of time was averagely 8.7%, and it is thought that temperature increase determines conversion efficiency with the influence of surrounding outside temperature and the module's temperature. 2. The generation efficiency of the BIPV system in the research subject buildings was averagely 10.9%. In May, it was 13.9%, and in January, it was the lowest as 10.25%. Considering the fact that power consumption reduces during an intermediate period, it will be necessary to establish measures for equipment and power consumption load balancing. 3. The monthly load rate of the BIPV system was averagely 4.09%. In May, it was the highest as 4.94%, and in July, it was the lowest as 3.24%. 4. It is intended to conduct constant follow-up research on estimating university dormitory building's power consumption unit cost and examining the generation efficiency and load rate of the BIPV system.