NDLI: Generalized constructal optimization for the secondary cooling process of slab continuous casting based on entransy theory

Content Provider	Springer Nature Link
Author	Feng, HuiJun Chen, LinGen Xie, ZhiHui Ding, ZeMin Sun, FengRui
Copyright Year	2014
Abstract	Based on constructal theory and entransy theory, a generalized constructal optimization of a solidification heat transfer process of slab continuous casting for a specified total water flow rate in the secondary cooling zone was carried out. A complex function was taken as the optimization objective to perform the casting. The complex function was composed of the functions of the entransy dissipation and surface temperature gradient of the slab. The optimal water distribution at the sections of the secondary cooling zone were obtained. The effects of the total water flow rate in the secondary cooling zone, casting speed, superheat and water distribution on the generalized constructal optimizations of the secondary cooling process were analyzed. The results show that on comparing the optimization results obtained based on the optimal water distributions of the 8 sections in the secondary cooling zone with those based on the initial ones, the complex function and the functions of the entransy dissipation and surface temperature gradient after optimization decreased by 43.25%, 5.90% and 80.60%, respectively. The quality and energy storage of the slab had obviously improved in this case. The complex function, composed of the functions of the entransy dissipation and surface temperature gradient of the slab, was a compromise between the internal and surface temperature gradients of the slab. Essentially, it is also the compromise between energy storage and quality of the slab. The “generalized constructal optimization” based on the minimum complex function can provide an optimal alternative scheme from the point of view of improving energy storage and quality for the parameter design and dynamic operation of the solidification heat transfer process of slab continuous casting.
Starting Page	784
Ending Page	795
Page Count	12
File Format	PDF
ISSN	16747321
Journal	Science in China Series E: Technological Sciences
Volume Number	57
Issue Number	4
e-ISSN	18691900
Language	English
Publisher	Science China Press
Publisher Date	2014-04-06
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	slab continuous casting solidification heat transfer entransy dissipation complex function generalized constructal optimization generalized thermodynamic optimization Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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