• Title/Summary/Keyword: Boiler Modeling

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Dynamic performance prediction of a Supercritical oil firing boiler - Load Runback simulation in a 650MWe thermal power plant (초임계 오일 연소 보일러의 동특성 예측 연구 - 650MWe급 화력발전소의 Load Runback 모사)

  • Yang, Jongin;Kim, Jungrae
    • 한국연소학회:학술대회논문집
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    • 2014.11a
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    • pp.19-20
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    • 2014
  • Boiler design should be desinged to maximize thermal efficiency of the system under imposed load requirement and a boiler should be validated for transient operation. If a proper prediction is possible on the transient behavior and transient characteristics of a boiler, one may asses the performance of boiler component, control logics and operation procedures. In this work, dynamic modeling method of boiler is presented and dynamic simulation of load runback scenario was carried out on suprecritical oil-firing boiler.

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Structural Analysis of Boiler Module for Sea-Transportation (해상 운송을 위한 보일러 모듈의 구조 해석)

  • Jeon, Y.C.;Kim, T.W.;Jeong, D.G.
    • Proceedings of the KSME Conference
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    • 2001.06a
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    • pp.788-793
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    • 2001
  • Finite element analysis was carried out to investigate the integrity and reliability of boiler module during sea transportation. The boiler module was supported by steel structure to relieve the instantaneous shock from oceanic wave and its primary parts were strengthened with several reinforcements. Finned tube walls which were used in the furnace wall were assumed as orthotropic plates having equivalent material properties. The bank tubes were also equivalently modeled in accordance with ASME B31.1 for the convenience of finite element modeling. The calculation results were compared with the yield stress of the material. In particular, the bank tube stress, which was evaluated by converting the calculated stresses in equivalent tubes into those in original tubes by using the ratio of diameter, was also examined with yield stress.

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Dynamic Simulation of the Water-steam System in Once-through Boilers - Sub-critical Power Boiler Case - (관류보일러 물-증기 계통의 동적 시뮬레이션 - 아임계 동력보일러 사례 -)

  • Kim, Seongil;Choi, Sangmin
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.41 no.5
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    • pp.353-363
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    • 2017
  • The dynamics of a water-steam system in a once-through boiler was simulated based on the physics-based modeling approach, representing the system in response to large load change or scale disturbance simulations. The modeling considered the mass, energy conservation, and momentum equation in the water pipe and the focus was limited to the sub-critical pressure region. An evaporator tube modeling was validated against the reference data. A simplified boiler system consisting of economizer, evaporator, and superheater was constructed to match a 500 MW power boiler. The dynamic response of the system following a disturbance was discussed along with the quantitative response characteristics. The dynamic response of the boiler system was further evaluated by checking the case of an off-design point operation of the feedwater-to-fuel supply ratio. The results re-emphasized the significance of controlling the feedwater-to-fuel supply ratio and additional design requirements of the water-steam separator and spray attemperator.

A Stduy on Model Development of Boiler Combustion System on Coal Fired Power Plant (석탄화력발전소 보일러 연소계통의 모델개발에 관한 연구)

  • Moon, Chae-Joo;Kim, Yong-Gu;Chung, Hwan-Joo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.3
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    • pp.65-73
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    • 2004
  • The bolier systems of coal fired power plants are large, non-linear systems with numerous interactions between its component parts. In the analysis of such complex systems, dynamic simulation is recognized as a powerful method of keeping track of the myriad of interactions. The boiler system consists of air/gas system and water/steam system. Due to recent reinforcement of environmental regulation on pollutant discharge and requirements of design validation on properites of boiler, the commercial programs are used for the analysis of boiler system. This paper addressed to the development of model using MMS(Modular Modeling System) developed by EPRI(Electric Power Research Institute) as the simulation tool. The developed model using MMS is tested for the design and local data on boiler combustion system of korea standard coal fired power plant boiler. The simulation results show that the developed model well reproduces responses of the combustion system with less than ${\pm}$5% error under steady state and transient state conditions. The developed model for analysis of the combustion system in this paper is general and applicable to any type of coal fired power plant.

A Study on Power Plant Modeling for Control System Design

  • Kim, Tae-Shin;Kwon, Oh-Kyu
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1449-1454
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    • 2003
  • For many industrial processes there are good static models used for process design and steady state operation. By using system identification techniques, it is possible to obtain black-box models with reasonable complexity that describe the system well in specific operating conditions [1]. But black-box models using inductive modeling(IM) is not suitable for model based control because they are only valid for specific operating conditions. Thus we need to use deductive modeling(DM) for a wide operating range. Furthermore, deductive modeling is several merits: First, the model is possible to be modularized. Second, we can increase and decrease the model complexity. Finally, we are able to use model for plant design. Power plant must be able to operate well at dramatic load change and consider safety and efficiency. This paper proposes a simplified nonlinear model of an industrial boiler, one of component parts of a power plant, by DM method and applies optimal control to the model.

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MODELING OF PRESSURE CONTROL SYSTEM OF BOILER (보일러 풍압 제어 계통의 모델링)

  • Park, Min-Ho;Mok, Hyung-Soo
    • Proceedings of the KIEE Conference
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    • 1987.11a
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    • pp.362-366
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    • 1987
  • The amount of inflowing Air into the boiler has controlled by manipulating the opening of valve, damper and vane, as fan operated by induction motor operats at constant speed, but these control methods are not efficient. Thus VVVf(Variable Voltage Variable Frequency) control of fan has selected to improve efficiency and to acquire power savings. Control system of Air Flow is affected by nonlinearity caused by load variation, vane opening, etc. The analysis of control parameter causing nonlinearity is needed to acquire optimal control and excellent transient response. This paper provides modeling of boiler with various load conditions and vane opening, and analysis of this system.

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Dynamics Modeling and Operation Simulation for the Simulation of Abrupt Faults in the Boiler Drum Level Control System of a Fossile Power Plant (돌발성 이벤트 형태의 고장 시뮬레이션을 위한 화력발전소 보일러 드럼 수위 제어 계통의 다이나믹스 모델링 및 운전 시뮬레이션)

  • Kim, Jeong-Geun;Kim, Jae-Hwa;Jang, Tae-Gyu
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.51 no.2
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    • pp.59-68
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    • 2002
  • This Paper presents the dynmics modeling and the operation simulation of the 500 MW drum-type boiler and its control system hosted in the Boryung Power Plant unit #1 and #2. The fidelity of the modeling and the operation simulation is well verified by their agreement with the actual data obtained form the plant operation. As a plant signal generator for the various operation patterns and fault situations, the simulation environment will be utilized to develope the fault detecting signal processing algorithms.

The Simulation of Boiler System for HADONG Fossil Power Plant

  • Choi, Jin-Ho;Ma, Sam-Sun;Lee,Yong-Kwan
    • Proceedings of the Korea Society for Simulation Conference
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    • 1999.10a
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    • pp.56-61
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    • 1999
  • The Simulation of Boiler System for Hadong Fossil power plant has been made by Korea Electric Power Research Institute (KERRI) in an attempt to develop Windown NT based full scope replica simulator for Hadong Fossil power plant, 500MWe once-through boiler. In the project KERRI developed Once Through, Super Critical type Boiler System, the core part of the Simulation and integrated the system with other process systems such as BOP System, and AUX System. This paper is to introduce the basic concept of the simulation for the Boiler System. It will also introduce PRO-TRAX System, for used as a modeling tool.

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Knowledge Representation for the Automatic Shutdown System in Boiler Plants (보일러 플랜트의 자동 Shutdown 시스템을 위한 지식표현)

  • 송한영;황규석
    • Journal of the Korean Society of Safety
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    • v.11 no.3
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    • pp.143-153
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    • 1996
  • Shutdown of boiler plants is a dynamic, complicated, and hazardous operation. Operational error is a major contributor to danserous situations during boiler plant shutdowns. It is important to develop an automatic system which synthesizes operating procedures to safely go from normal operation to complete shutdown. Knowledge representation for automatic shutdown of boiler plants makes use of the hierarchical, rule-based framework for heuristic knowledge, the semantic network, frame for process topology, and AI techniques such as rule matching, forward chaining, backward chaining, and searching. This knowledge representation and modeling account for the operational states, primitive operation devices, effects of their application, and planning methodology. Also, this is designed to automatically formulate subgoals, search for positive operation devices, formulate constraints, and synthesize shutdown procedures in boiler plants.

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Process Modeling of the Coal-firing Power Plant as a Testbed for the Improvement of the System and Equipment (화력발전 시스템 및 설비 개선 실증을 위한 열물질정산 공정모델 개발)

  • Ahn, Hyungjun;Choi, Seukcheun;Lee, Youngjae;Kim, Beom Soo
    • Journal of the Korean Society of Combustion
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    • v.23 no.1
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    • pp.44-54
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    • 2018
  • Heat and mass balance process modeling has been conducted for a coal-firing power plant to be used as a testbed facility for development of various plant systems and equipment. As the material and design of the boiler tube bundle and fuel conversion to the biomass have become major concerns, the process modeling is required to incorporate those features in its calculation. The simulation cases for two different generation load show the satisfying results compared to the operational data from the actual system. Based on the established process conditions, the hypothetical case using wood pellet has also been simulated. Additional calculations for the tube bundle has been conducted regarding the changes in the tube material and design.