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Open AccessArticle

Application of Entropy Generation to Improve Heat Transfer of Heat Sinks in Electric Machines

1
Robert Bosch SG GmbH, Robert-Bosch Strasse 2, 71701 Schwieberdingen, Germany
2
Laboratory of Fluid Dynamics and Technical Flows, Otto von Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
3
Robert Bosch Engineering and Business Solutions Limited, CHIL-SEZ Keeranatham Village, 641035 Tamil Nadu Coimbatore, India
*
Author to whom correspondence should be addressed.
Academic Editor: Yan Jin
Entropy 2017, 19(6), 255; https://doi.org/10.3390/e19060255
Received: 15 April 2017 / Revised: 24 May 2017 / Accepted: 26 May 2017 / Published: 2 June 2017
(This article belongs to the Special Issue Entropy in Computational Fluid Dynamics)
To intensify heat transfer within the complex three-dimensional flow field found in technical devices, all relevant transport phenomena have to be taken into account. In this work, a generic procedure based on a detailed analysis of entropy generation is developed to improve heat sinks found in electric machines. It enables a simultaneous consideration of temperature and velocity distributions, lumped into a single, scalar value, which can be used to directly identify regions with a high potential for heat transfer improvement. By analyzing the resulting entropy fields, it is demonstrated that the improved design obtained by this procedure is noticeably better, compared to those obtained with a classical analysis considering separately temperature and velocity distributions. This opens the door for an efficient, computer-based optimization of heat transfer in real applications. View Full-Text
Keywords: entropy generation; irreversibility ratio; second law analysis; optimization; electric machines entropy generation; irreversibility ratio; second law analysis; optimization; electric machines
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MDPI and ACS Style

Eger, T.; Bol, T.; Thanu, A.R.; Daróczy, L.; Janiga, G.; Schroth, R.; Thévenin, D. Application of Entropy Generation to Improve Heat Transfer of Heat Sinks in Electric Machines. Entropy 2017, 19, 255.

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