• Title/Summary/Keyword: Power Plant Boiler

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100 MWe Oxyfuel Power Plant Boiler System Process Design and Operation Parameters Sensitivity Analysis (100 MWe급 순산소연소 발전소 보일러계통 공정설계 및 운전변수 민감도 예측)

  • Baek, Sehyun;Ko, SungHo
    • Journal of the Korean Society of Combustion
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    • v.18 no.4
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    • pp.1-11
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    • 2013
  • The oxy-fuel combustion is $CO_2$ capture technology that uses mixture of pure $O_2$ and recirculated exhaust as oxidizer. Currently some Oxy-fuel power plants demonstration project is underway in worldwide. Meanwhile research project for converting 125 MWe Young-Dong power plant to 100 MWe oxy-fuel power plants is progress. In this paper, 1 D process analytical approach was applied for conducting process design and operating parameters sensitivity analysis for oxy-fuel combustion of Young-Dong power plant. As a result, appropriate gas recirculation rates was 74.3% that in order to maintain normal rating superheater, reheater steam temperature and boiler heat transfer patterns. And boiler efficiency 85.0%, CPU inlet $CO_2$ mole concentration 71.34% was predicted for retrofitted boiler. The oxygen concentration in the secondary recycle gas is predicted as 27.1%. Meanwhile the oxygen concentration 22.4% and moisture concentration 5.3% predicted for primary recycle gas. As the primary and secondary gas recirculation increases, then heat absorption of the reheater is tends to increases whereas superheater side is decreased, and also the efficiency is tends to decrease, according to results of sensitivity analysis for operating parameters. In addition, the ambient air ingression have a tendency to lead to decline of efficiency for boiler as well as decline of $CO_2$ purity of CPU inlet.

A Study on the Exergy Losses of Steam Power Plant (증기 원동소의 엑서지 손실에 관한 연구)

  • Park, J.C.;Jang, M.S.;Lee, C.S.
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.1 no.3
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    • pp.235-243
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    • 1989
  • The purpose of this paper is to obtain enthalpy balance and exergy analysis for the energy losses in a steam power plant. The enthalpy and exergy analysis of the steam power plant were carried out on the various output of steam turbine. While enthalpy analysis shows that circulating loss in the condenser is maximum, exergy evaluation of the power plant shows that the losses of the boiler and turbine are considerably larger than those of condenser and feed water heater. Most irreversible losses of the power plant occur at the boiler. For improving the performance, the precise study about the irreversible losses of the boiler is necessary.

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A Study on the Heat Transfer in boiler through the performance test in thermal power plant (화력발전소 보일러내의 열전달에 관한 연구)

  • Kwon, Y.S.;Suh, J.S.
    • Proceedings of the KSME Conference
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    • 2004.04a
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    • pp.2064-2069
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    • 2004
  • The main reason to analyze heat transfer in boiler inside through the performance test in fossil power plant is to increase plant high efficiency and energy saving movement in the government. Tins study intends to have trend and analyze the boiler heat transfer through the performance test, so it may give us the heat distribution in boiler inside in super-critical and sub-critica1 pressure type power plant

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A Study of Boiler Control Loop Simulation in Thermal Power Plant (화력발전소 보일러 제어루프의 시뮬레이션에 관한 연구)

  • Lee, J.H.;Lee, C.J.
    • Proceedings of the KIEE Conference
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    • 1999.07b
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    • pp.868-870
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    • 1999
  • In this paper we obtain a discrete mathmatical model of a Boiler control system from expermental data, we find appropriate input signal and parameter estimation algorithm for identification of the Boiler control system in power plant. Under these conditions experimental data are collected from real system and parameters are estimated by the Recursive Least Square algorithm. The computer simulation results show the parameter estimation algorithm for identification and the effectiveness of controller design of the Boiler control system.

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Co-combustion of Bituminous Coal with Anthracite in a Down-firing, 200 MW Boiler

  • Park, Ho Young;Baek, Se Hyun;Kim, Young Joo;Kim, Tae Hyung;Kim, Hyun Hee;Lim, Hyun Soo;Park, Yoon Hwa
    • KEPCO Journal on Electric Power and Energy
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    • v.1 no.1
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    • pp.93-97
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    • 2015
  • The combustion tests for Korean anthracite-bituminous coal blend were carried out in the 200 MW utility boiler. The burning characteristics of the blend were studied with a thermogravimetric analyzer (TGA). From the observation of TGA burning profiles, it was found that the presence of bituminous coal in the blend appeared to enhance the reactivity of anthracite in the higher temperature region, indicating certain interactions between the two coals. The plant test showed the boiler operation was reasonably stable with somewhat poor combustion efficiency, and some modification of the combustion environment in the furnace is necessitate for the further stable plant operation.

STATUS OF WELDING FOR POWER PLANT FACILITIES

  • Hur, Sung-do
    • Proceedings of the KWS Conference
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    • 2002.10a
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    • pp.342-348
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    • 2002
  • The welding technology for production of power plant facility as for other industries has been progressing forward automation and mechanization for cost reduction and shortening of cycle time. The welding for boiler tube is automated or mechanized as the parts and subassemblies of tubes are conveyed automatically in the shop. The temperature of boiler stearn is being progressively increased for higher plant efficiency. The welding of nuclear component is characterized by heavy thickness and narrow gap Submerged Arc Welding. Narrow gap Gas Metal Arc Welding and Electron Beam Welding is applied to turbine diaphragm. To improve the resistance of solid particle erosion of turbine blade and nozzle partition, HVOF spray technology and boriding process has been applied.

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Temperature Control of Superheater Steam in Thermal Power Plant (화력발전소의 과열기증기의 온도제어)

  • Shin, Hwi-Beom;Lee, Soon-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.11
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    • pp.2006-2011
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    • 2010
  • The superheater in the thermal power plant makes the wet steam into the dry steam with high temperature and high pressure by using the boiler heat. The dry steam pressure rotates the turbine-generator system. The efficiency and life time of the boiler heavily depends on the steam temperature regulation. The steam temperature can be deviated from the reference by the MW demand of the power plant. It is therefore required that the PI(proportional-integral) controller should be robust against the disturbance such as the MW demand. In this paper, the PI controller with the integral state predictor is proposed and applied to regulate the steam temperature of the superheater, and it is compared with the conventional PI controller operated in the thermal power plant in view of control performance.

Simulation Study on Measuring Pulverized Coal Concentration in Power Plant Boiler

  • Chen, Lijun;Wang, Yang;Su, Cheng
    • Journal of Information Processing Systems
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    • v.15 no.1
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    • pp.189-202
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    • 2019
  • During thermal power coal-fired boiler operation, it is very important to detect the pulverized coal concentration in the air pipeline for the boiler combustion stability and economic security. Because the current measurement methods used by power plants are often involved with large measurement errors and unable to monitor the pulverized coal concentration in real-time, a new method is needed. In this paper, a new method based on microwave circular waveguide is presented. High Frequency Electromagnetic Simulation (HFSS) software was used to construct a simulation model for measuring pulverized coal concentration in power plant pipeline. Theoretical analysis and simulation experiments were done to find the effective microwave emission frequency, installation angle, the type of antenna probe, antenna installation distance and other important parameters. Finally, field experiment in Jilin Thermal Power Plant proved that with selected parameters, the measuring device accurately reflected the changes in the concentration of pulverized coal.

Auto-tuning of boiler drum level controller in Thermal Power Plant (화력 발전소 보일러 드럼수위 제어기의 자동 동조)

  • Lee, J.H.;Joo, H.Y.;Byun, H.S.
    • Proceedings of the KIEE Conference
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    • 2000.07d
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    • pp.2584-2586
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    • 2000
  • A drum level control is one of the most important control systems in thermal power plant. The control objective of drum level of boiler in thermal power plant is to maintain drum level at constant set-point regardless of disturbance such as main steam flow. The implemented drum level controller is the cascade PI controller. The important factor in drum level controller is the parameters of two PI controllers. The tuning of PI controller parameter is tedious and time-consuming job. In this paper, the relay feedback Ziegler - Nichols tuning method extended to auto-tune cascade PI drum level controller. Finally, the simulation result using boiler model in Power Plant shows the validity of auto-tuned cascade PI controller.

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The Development of Boiler Combustion Air Control Algorithm for Coal-Fired Power Plant (석탄화력발전소 보일러 연소용 공기 제어알고리즘의 개발)

  • Lim, Gun-Pyo;Lee, Heung-Ho
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.61 no.4
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    • pp.153-160
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    • 2012
  • This paper is written for the development of boiler combustion air control algorithm of coal-fired power plant by the steps of design, coding and test. The control algorithms were designed in the shape of cascade control for two parts of air master, forced draft fan pitch blade by standard function blocks. This control algorithms were coded to the control programs of distributed control systems under development. The simulator for coal-fired power plant was used in the test step and automatic control, sequence control and emergency stop tests were performed successfully like the tests of the actual power plant. The reliability will be obtained enough to apply to actual site if the total test has been completed in the state that all algorithms were linked mutually. It is expected that the project result will contribute to the safe operation of domestic power plant and the self-reliance of coal-fired power plant control technique.