Journal
APPLIED THERMAL ENGINEERING
Volume 91, Issue -, Pages 105-115Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2015.08.001
Keywords
Light emitting diode (LED); Fin heat sink; Opening; Thermal design optimization; Natural convection
Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2013R1A2A2A01068888]
- Human Resources Development Program of the Korean Institute of Energy Technology Evaluation and Planning (KETEP) - Korea Government Ministry of Trade, Industry and Energy [20144010200770]
- National Research Foundation of Korea [2013R1A2A2A01068888, 21A20131712520] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Effective cooling is very important issue in a light emitting diode (LED) module because its performance and reliability decrease significantly as the junction temperature increases. This study proposes a cooling method that improves upon the poor ventilation and heat dissipation of a horizontal fin heat sink mounted on an LED module with natural convection. Response surface methodology (RSM) was used to optimize the geometry of the horizontal fin heat sink with the modified openings, and the cooling performance of the proposed model was compared against those of conventional fin heat sinks. The total thermal resistance of the proposed model is decreased by 30.5% relative to that of the conventional no-opening model at an orientation of 1800 and a heat input of 10 W. In addition, the luminous efficacy of the proposed model is increased by 23.7% relative to that of the conventional no-opening model at an orientation of 1800 and a heat input of 25 W. (C) 2015 Elsevier Ltd. All rights reserved.
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