• 제목/요약/키워드: Co-generation System

검색결과 808건 처리시간 0.025초

이기종 태양광 설비 지원을 위한 범용 RMC 게이트웨이 개발 (Development of General-Purpose Remote Maintenance Controller Gateway for Multi-Modal Photovoltaic Equipment)

  • 임수창;홍석훈;박철영;송법성;김종찬
    • 한국멀티미디어학회논문지
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    • 제23권10호
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    • pp.1307-1317
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    • 2020
  • In recent years, the PV plant is gradually increasing in korea and has begun to focus on PV system O&M(Operation and Management). The legacy PV system can hardly be gathering realtime information. That is why it is difficult for the facility to respond immediately to situations in which problems arise. This leads to economic losses due to reduced power generation. In this study, we implemented an RMC(Remote Maintenance Control) gateway that supports multi-area equipment(inverters, junction boxes, switchboards, environmental sensors) that are not limited to specific manufacturers. It provides a function to visualize the collected data. Users can easily check the power generation and operation status of PV system equipment. In the future, we will develop an algorithm capable of analyzing beta factors that cause equipment performance degradation, parts aging, and deterioration using data collected from facilities. We intend to use this algorithm as a fundamental technology for O&M by transplanting it to the RMC gateway.

직사각형 격자체계에서의 원호형 내부조파 (Internal Generation of Waves on an Arc In A Rectangular Grid System)

  • 이창훈;최혁진;김덕구
    • 한국해안해양공학회지
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    • 제18권1호
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    • pp.1-14
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    • 2006
  • 본 논문에서 직사각형 격자 체계에서 원호형 내부조파에 의한 선 조파기법을 개발하였다. 총 다섯 가지 조파형식의 수치실험이 다음의 조건에 수행되었다. 즉, 일정수심에서의 파랑의 전파, 일정경사를 가지는 평면에서의 굴절과 천수, 반무한 방파제에서 회절 실험을 수행하였다. 수치실험 수행 시 기본방정식으로 Suh et al. (1997)이 제안한 확장형 완경사방정식을 이용하였다. 두 개의 평행한 직선이 반원으로 연결된 제5형식 조파기법을 사용하면 가장 우수한 결과를 얻을 수 있었다. 특히, 격자간격이 작은 경우에 그 우수성이 확연히 드러났다.

CNC레이저 가공기를 이용한 활자체 가공에 관한 연구 (A Study on the COntour Machining of Text using CNC Laser Machine)

  • 구영회
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
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    • pp.554-559
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    • 1999
  • The purpose of this study is the machining of texture shapes by the contour fitting data. The hardware of the system comprises PC and scanning system, CO2 laser machine. There are four steps, (1) text image loading using scanning shapes or 2D image files, (2) generation of contour fitting data by the line and arc, cubic Bezier curve, (3) generation of NC code from the contouring fitting data, (4) machining by the DNC system. It is developed a software package, with which can conduct a micro CAM system of CNC laser machine in the PC without economical burden.

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태양열 온수 시스템에 적용 가능한 100 W급 열전발전 모듈 성능에 관한 연구 (A Study on the Performance of 100 W Thermoelectric Power Generation Module for Solar Hot Water System)

  • 서호영;이경원;윤정훈;이순환
    • 한국태양에너지학회 논문집
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    • 제39권1호
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    • pp.21-32
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    • 2019
  • Solar hot water system produces hot water using solar energy. If it is not used effectively, overheating occurs during the summer. Therefore, a lot of research is being done to solve this. This study develops thermoelectric power module applicable to solar hot water system. A thermoelectric material can directly convert thermal energy into electrical energy without additional power generation devices. If there is a temperature difference between high and low temperature, it generate power by Seebeck effect. The thermoelectric module generates electricity using temperature differences through the heat exchange of hot and cold water. The water used for cooling is heated and stored as hot water as it passes through the module. It can prevent overheating of Solar hot water system while producing power. The thermoelectric module consists of one absorption and two radiation part. There path is designed in the form of a water jacket. As a result, a temperature of the absorption part was $134.2^{\circ}C$ and the radiation part was $48.6^{\circ}C$. The temperature difference between the absorption and radiation was $85.6^{\circ}C$. Also, The Thermoelectric module produced about 122 W of irradiation at $708W/m^2$. At this time, power generation efficiency was 2.62% and hot water conversion efficiency was 62.46%.

열병합발전 아파트의 난방조절방식과 온열환경 (Thermal Environment and Heating Regulation System of the Co-Generation Apartment)

  • 윤정숙
    • 대한가정학회지
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    • 제30권3호
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    • pp.131-140
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    • 1992
  • The purpose of this study was to investigate the heating regulation systems and the thermal environment of the Co-Generation apartment house in winter. Personal self-administration and interview method were used in the survey of this study. The respondents were 352 housewives who resided in Mokdong apartement using Co-Generation heating systems. Data was analyzed using SPSS PC+ computer package. The results of this study were summarised as follow; The typical patterns of heating regulation systems were intermittent and partial heating in the living room and bedroom exclusive of kitchen area. The present condition of the thermal environment were relatively warm in winter and Heatng regulation systems were influenced by type of location. Determinants of the thermal sensation and thermal comfort were the type of location of apartment as a architectural factor, clo as a personal factor.

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빌딩 마이크로그리드가 포함된 새로운 빌딩에너지 시스템 구축방향에 관한 연구 (The Novel Configuration for Building Energy System Including Build ins Microgrid)

  • 홍원표
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2008년도 추계학술대회 논문집
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    • pp.235-240
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    • 2008
  • The recent development of efficient thermal prime movers for distributed generation id changing the focus of the production of electricity from large centralized power plants to local generation units scattered over the territory. The scientific communality is addressing the analysis and planning of the distributed energy resources(der) with wide spread approaches, taking into account technical, environmental, economical and social issues. The coupling of cogeneration system to absorption/electric chillers or heat pumps as well as the interactions with renewable sources, allow for setting up multi-generation systems for building cooling heating and power(BCHP) systems of different energy vectors such as electricity, heat(at different enthalpy levels), cooling power, hydrogen, various chemical substances and so forth. Adoption of the composite multi-generation systems may lead to significant benefits in term of higher efficiency, reduced $CO_2$ emissions and enhanced economy. This paper outlines the main aspects of the BCHP system framework, illistrating its characteristics and summarizing the relevant distributed multi-generation structures.

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산소분리기술을 사용한 연료전지/순산소연소 발전시스템 해석 (Analysis of Solid Oxide Fuel Cell/Oxy-fuel Combustion Power Generation System Using Oxygen Separation Technology)

  • 박성구;김동섭;손정락;이영덕
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2008년도 추계학술대회 논문집
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    • pp.51-54
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    • 2008
  • This study aims to devise and analyze a power generation system combining the solid oxide fuel cell and oxy-fuel combustion technology. The fuel cell operates at an elevated pressure, a constituting a SOFC/gas turbine hybrid system. Oxygen is extracted from the high pressure cathode exit gas using ion transport membrane technology and supplied to the oxy-fuel power system. The entire system generates much more power than the fuel cell only system due to increased fuel cell voltage and power addition from oxy-fuel system. More than one third of the power comes out of the oxy-fuel system. The system efficiency is also higher than that of the fuel cell only system. Recovering most of the generated carbon dioxide is major advantage of the system.

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대용량 연료전지시스템의 계통외란 방지알고리즘에 관한 연구 (A Study on the Countermeasure Algorithm for Power System Disturbances in Large Scale Fuel Cell Generation System)

  • 최성식;김병기;박재범;노대석
    • 전기학회논문지
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    • 제65권5호
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    • pp.711-717
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    • 2016
  • Recently, fuel cell generation system with high energy efficiency and low CO2 emission is energetically interconnected with distribution power system. Especially, MCFC(molten carbonate fuel cell) operating at high temperature conditions is commercialized and installed as a form of large scale power generation system. However, it is reported that power system disturbances such as harmonic distortion, surge phenomenon, unbalance current, EMI(Electromagnetic Interference), EMC (Electromagnetic Compatibility) and so on, have caused several problems including malfunction of protection device and damage of control devices in the large scale FCGS(Fuel Cell Generation System). Under these circumstances, this paper proposes countermeasure algorithms to prevent power system disturbances based on the modelling of PSCAD/EMTDC and P-SIM software. From the simulation results, it is confirmed that proposed algorithms are useful method for the stable operation of a large scale FCGS.

A Comparative Study on Power Generation Characteristics of Permanent Magnet Synchronous Generators for Green Ship

  • Kato, Shinji;Cho, Gyeong-Rae;Michihira, Masakazu
    • Journal of Advanced Marine Engineering and Technology
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    • 제36권3호
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    • pp.378-386
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    • 2012
  • For reduction of the amount of CO2 emitted from ships, power generation characteristics of two power generation systems consisting of a high-efficiency permanent magnet synchronous generator and diode bridge rictifiers are discussed in this paper. One of the discussed systems has three-phase stator windings, and the other has two sets of three-phase (six-phase) stator windings to reduce pulsation in the electromagnetic torque and DC current. Experimental results reveal that the power generation efficiency of the system having six-phase stator windings is higher than that of the system having three-phase stator windings for a light load. The maximum power generation efficiency of the system having six-phase stator windings is almost the same as that of the system having three-phase stator windings. For the electromagnetic torque of the system having six-phase stator windings, the width of pulsation is about one-fifth compared to the system having three-phase stator windings.

A Study on Variable Speed Generation System with Energy Saving Function

  • Dugarjav, Bayasgalan;Lee, Sang-Ho;Han, Dong-Hwa;Lee, Young-Jin;Choe, Gyu-Ha
    • Journal of Electrical Engineering and Technology
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    • 제8권1호
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    • pp.137-143
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    • 2013
  • This paper presents development of variable speed generation (VSG) system with energy saving function. The rubber tyred gantry crane (RTGC) requires the power from diesel-engine. Significant fuel savings by reducing the engine speed can be achieved, because all of operation modes except hoisting are required lower power than rated value of engine. When low speed operation output voltage of generator is decrease until acceptable range of motor driver inverters and auxiliary load supplier. According to power demand engine speed is varying from 20 to 60Hz, and voltage is varying between 210Vac and 480Vac. When idle mode or low power operation dc/dc converter operates by constant output voltage control and inverters dc site voltage is compensated by it. This paper proposed 3-phase interleaved boost converter which has the same structure as the commercially available 3-phase inverter and current sharing capability. 400kW interleaved converter is designed and a performance of converter is evaluated through several experiments with a RTGC system. Energy saving VSG system can cut down fuel consumption by 36% and 21.3% at idle and unidirectional load operations.