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Entropy 2011, 13(7), 1212-1228; doi:10.3390/e13071212
Article

Application of the EGM Method to a LED-Based Spotlight: A Constrained Pseudo-Optimization Design Process Based on the Analysis of the Local Entropy Generation Maps

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Received: 22 April 2011; in revised form: 5 June 2011 / Accepted: 15 June 2011 / Published: 27 June 2011
(This article belongs to the Special Issue Entropy Generation Minimization)
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Abstract: In this paper, the entropy generation minimization (EGM) method is applied to an industrial heat transfer problem: the forced convective cooling of a LED-based spotlight. The design specification calls for eighteen diodes arranged on a circular copper plate of 35 mm diameter. Every diode dissipates 3 W and the maximum allowedtemperature of the plate is 80 °C. The cooling relies on the forced convection driven by a jet of air impinging on the plate. An initial complex geometry of plate fins is presented and analyzed with a commercial CFD code that computes the entropy generation rate. A pseudo-optimization process is carried out via a successive series of design modifications based on a careful analysis of the entropy generation maps. One of the advantages of the EGM method is that the rationale behind each step of the design process can be justified on a physical basis. It is found that the best performance is attained when the fins are periodically spaced in the radial direction.
Keywords: CFD; convection; entropy; EGM; compact heat-exchanger CFD; convection; entropy; EGM; compact heat-exchanger
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Giangaspero, G.; Sciubba, E. Application of the EGM Method to a LED-Based Spotlight: A Constrained Pseudo-Optimization Design Process Based on the Analysis of the Local Entropy Generation Maps. Entropy 2011, 13, 1212-1228.

AMA Style

Giangaspero G, Sciubba E. Application of the EGM Method to a LED-Based Spotlight: A Constrained Pseudo-Optimization Design Process Based on the Analysis of the Local Entropy Generation Maps. Entropy. 2011; 13(7):1212-1228.

Chicago/Turabian Style

Giangaspero, Giorgio; Sciubba, Enrico. 2011. "Application of the EGM Method to a LED-Based Spotlight: A Constrained Pseudo-Optimization Design Process Based on the Analysis of the Local Entropy Generation Maps." Entropy 13, no. 7: 1212-1228.


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