One-dimensional simulation for attemperator based on commissioning data of coal-fired steam power plant

Baekhyun Cho; Geunwon Choi; Yumi Uruno; Hyunseo Kim; Jaewon Chung; Hyojun Kim; Kihyun Lee

doi:10.1016/j.applthermaleng.2016.11.069

One-dimensional simulation for attemperator based on commissioning data of coal-fired steam power plant

Baekhyun Cho, Geunwon Choi, Yumi Uruno, Hyunseo Kim, Jaewon Chung, Hyojun Kim, Kihyun Lee

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

An attemperator is a device that is used to spray water into the superheated steam between the primary, platen, and final superheaters and the reheat lines. The goal of the attemperator is to control the temperature of the superheated steam in accordance with desired turbine-inlet temperature during both steady-state and transient operation. Because the thermowell installed at the attemperator outlet is tied back to the feedback control of the spray water, the spray water should evaporate ahead of the thermowell for accurate control of the steam temperature. In this work, the completion of the evaporation ahead of the thermowell was analyzed using the enthalpy balance from the start-up commissioning data of an 800-MW coal-fired steam power plant. In addition, the phenomena of the spray atomization and its concurrent evaporation in an attemperator were physically modeled, and a simple one-dimensional simulation was conducted to verify the analysis of the commissioning data.

Original language	English
Pages (from-to)	508-518
Number of pages	11
Journal	Applied Thermal Engineering
Volume	113
DOIs	https://doi.org/10.1016/j.applthermaleng.2016.11.069
Publication status	Published - 2017 Feb 25

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education, Science and Technology ( NRF-2012R1A1A2042447 ) and by Doosan Heavy Industries and Construction Co. Ltd. .

Publisher Copyright:
© 2016 Elsevier Ltd

Keywords

Atomization
Attemperator
Droplet evaporation
Power plant
Spray

ASJC Scopus subject areas

Mechanical Engineering
Energy Engineering and Power Technology
Fluid Flow and Transfer Processes
Industrial and Manufacturing Engineering

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10.1016/j.applthermaleng.2016.11.069

Cite this

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title = "One-dimensional simulation for attemperator based on commissioning data of coal-fired steam power plant",

abstract = "An attemperator is a device that is used to spray water into the superheated steam between the primary, platen, and final superheaters and the reheat lines. The goal of the attemperator is to control the temperature of the superheated steam in accordance with desired turbine-inlet temperature during both steady-state and transient operation. Because the thermowell installed at the attemperator outlet is tied back to the feedback control of the spray water, the spray water should evaporate ahead of the thermowell for accurate control of the steam temperature. In this work, the completion of the evaporation ahead of the thermowell was analyzed using the enthalpy balance from the start-up commissioning data of an 800-MW coal-fired steam power plant. In addition, the phenomena of the spray atomization and its concurrent evaporation in an attemperator were physically modeled, and a simple one-dimensional simulation was conducted to verify the analysis of the commissioning data.",

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note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education, Science and Technology ( NRF-2012R1A1A2042447 ) and by Doosan Heavy Industries and Construction Co. Ltd. . Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

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AU - Chung, Jaewon

AU - Kim, Hyojun

AU - Lee, Kihyun

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education, Science and Technology ( NRF-2012R1A1A2042447 ) and by Doosan Heavy Industries and Construction Co. Ltd. . Publisher Copyright: © 2016 Elsevier Ltd

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N2 - An attemperator is a device that is used to spray water into the superheated steam between the primary, platen, and final superheaters and the reheat lines. The goal of the attemperator is to control the temperature of the superheated steam in accordance with desired turbine-inlet temperature during both steady-state and transient operation. Because the thermowell installed at the attemperator outlet is tied back to the feedback control of the spray water, the spray water should evaporate ahead of the thermowell for accurate control of the steam temperature. In this work, the completion of the evaporation ahead of the thermowell was analyzed using the enthalpy balance from the start-up commissioning data of an 800-MW coal-fired steam power plant. In addition, the phenomena of the spray atomization and its concurrent evaporation in an attemperator were physically modeled, and a simple one-dimensional simulation was conducted to verify the analysis of the commissioning data.

AB - An attemperator is a device that is used to spray water into the superheated steam between the primary, platen, and final superheaters and the reheat lines. The goal of the attemperator is to control the temperature of the superheated steam in accordance with desired turbine-inlet temperature during both steady-state and transient operation. Because the thermowell installed at the attemperator outlet is tied back to the feedback control of the spray water, the spray water should evaporate ahead of the thermowell for accurate control of the steam temperature. In this work, the completion of the evaporation ahead of the thermowell was analyzed using the enthalpy balance from the start-up commissioning data of an 800-MW coal-fired steam power plant. In addition, the phenomena of the spray atomization and its concurrent evaporation in an attemperator were physically modeled, and a simple one-dimensional simulation was conducted to verify the analysis of the commissioning data.

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One-dimensional simulation for attemperator based on commissioning data of coal-fired steam power plant

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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