Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

Hang Yin, Yingai Jin (), Liang Li and Wenbo Lv
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Hang Yin: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
Yingai Jin: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
Liang Li: Department of Engineering, School of Physics, Engineering and Computer Science, University of Hertfordshire, Hatfield AL10 9AB, Hertfordshire, UK
Wenbo Lv: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China

Energies, 2022, vol. 15, issue 21, 1-19

Abstract: In current power station boilers, fuel burns at a low temperature, which results in low exergy efficiency. This research combined the second law of t with the boiler structure to maximize the efficiency of a 350 MW power plant boiler. A three-dimensional simulation of the combustion process at the power plant boiler is performed. A one-dimensional simulation model of the boiler is then constructed to calculate the combustion exergy loss, heat transfer exergy loss, and boiler exergy efficiency. Under the principle of high-temperature air combustion technologies, this paper also proposes a new structure and improved operating parameters to improve the exergy efficiency of boilers by reducing the heat exchange area of the economizer and increasing the heat exchange area of the air preheater. Simulation results show that the exergy efficiency of the boiler increased from 47.29% to 48.35% through the modified model. The simulation outcomes can instruct future optimal boiler design and controls.

Keywords: power plant boiler; second low of thermodynamics; exergy efficiency; structural development (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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