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research article

Improved Waste Heat Management and Energy Integration in an Aluminum Annealing Continuous Furnace Using a Machine Learning Approach

Andayesh, Mohammad  
•
Florez Orrego, Daniel Alexander  
•
Germanier, Reginald
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October 27, 2023
Entropy MDPI

Annealing furnaces are critical for achieving the desired material properties in the production of high-quality aluminum products. In addition, energy efficiency has become more and more important in industrial processes due to increasing decarbonization regulations and the price of natural gas. Thus, the current study aims to determine the opportunities to reduce energy consumption in an annealing continuous furnace and the associated emissions. To this end, the heat transfer phenomenon is modeled and solutions for the decreasing fuel consumption are evaluated so that the overall performance of the process is enhanced. A heat transfer model is developed using the finite difference method, and the heat transfer coefficient is calculated using machine learning regression models. The heat transfer model is able to predict the heat transfer coefficient and calculate the aluminum temperature profile along the furnace and the fuel consumption for any given operating condition. Two solutions for boosting the furnace exergy efficiency are evaluated, including the modulation of the furnace temperature profiles and the energy integration by the recycling of exhaust flue gases. The results show that the advanced energy integration approach significantly reduces fuel consumption by up to 20.7%. Sensitivity analysis demonstrates that the proposed strategy can effectively reduce fuel consumption compared with the business-as-usual scenario for a range of sheet thicknesses and sheet velocities.

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Type
research article
DOI
10.3390/e25111486
Author(s)
Andayesh, Mohammad  
Florez Orrego, Daniel Alexander  
Germanier, Reginald
Gatti, Manuele
Maréchal, François  
Date Issued

2023-10-27

Published in
Entropy MDPI
Volume

25

Issue

11

Article Number

1486

Subjects

Annealing continuous furnace

•

Decarbonization

•

Computational fluid dynamics

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Machine learning

•

Exergy analysis

•

Energy integration

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-STI-FM  
Available on Infoscience
October 29, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/201935
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