<abstract xmlns="http://www.w3.org/1999/xhtml">This study presents an analysis of the process of the use of waste heat from flue gas for the purposes of heating water in the regeneration system of a steam power unit fuelled with brown coal with a power of 900 MWe. Preparation of flue gas and its initial moistening (increasing the dew point temperature) followed by cooling (condensation of the moisture contained in the flue gas) can ensure intensive heat exchange in the process of heat recovery. Replacing a first regeneration exchanger with the heat recovered from flue gas allows for an increase in steam power unit efficiency by 0.22% and limitation of CO2 emissions by 22,810 t/year, while reducing the fuel demand by 26,727 tonnes per annum. Depending on the prices of CO2 emissions permits and prices of brown coal, the proposed heat recovery allows for saving from €500,000 to €1,000,000 per year.</abstract>

This study presents an analysis of the process of the use of waste heat from flue gas for the purposes of heating water in the regeneration system of a steam power unit fuelled with brown coal with a power of 900 MWe. Preparation of flue gas and its initial moistening (increasing the dew point temperature) followed by cooling (condensation of the moisture contained in the flue gas) can ensure intensive heat exchange in the process of heat recovery. Replacing a first regeneration exchanger with the heat recovered from flue gas allows for an increase in steam power unit efficiency by 0.22% and limitation of CO2 emissions by 22,810 t/year, while reducing the fuel demand by 26,727 tonnes per annum. Depending on the prices of CO2 emissions permits and prices of brown coal, the proposed heat recovery allows for saving from €500,000 to €1,000,000 per year.

The use of Waste Heat from Flue Gas in the System of Regeneration of Steam Boiler Supply Water

Technical Transactions

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This study presents an analysis of the process of the use of waste heat from flue gas for the purposes of heating water in the regeneration system of a steam...

The use of Waste Heat from Flue Gas in the System of Regeneration of Steam Boiler Supply Water

Published Online: May 26, 2020

Page range: 209 - 217

DOI: https://doi.org/10.4467/2353737XCT.17.102.6578

Keywords
waste heat, regeneration system, steam power unit

© 2020 Robert Zarzycki, published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

The use of Waste Heat from Flue Gas in the System of Regeneration of Steam Boiler Supply Water

Published Online: May 26, 2020

Page range: 209 - 217

DOI: https://doi.org/10.4467/2353737XCT.17.102.6578

Keywordswaste heat, regeneration system, steam power unit

© 2020 Robert Zarzycki, published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

Keywords
waste heat, regeneration system, steam power unit