not contain any toxic material, such as fluorescent lights having mercury inside which is not good towards the environment. Advantages of using LED are high luminosity, more energy saving, high lifetime hours, and applicable in many applications. However, LED operating temperature should be considered. LEDs with high power, such as 10 Watts or more, can generate bright lighting, but also will have high operating temperature. This high operating temperature of LED should be lowered, since high operating temperature will lead to reductions of the luminosity and the lifetime of LED.
Many cooling systems can be used to reduce the operating temperature of LED; a simple one is to use the extruded-fin heat sink. Heat sink is easy to manufacture, relatively low in cost, light in weight, and can become an adequate cooling means with good reliability. The choice of an optimal heat sink dimension depends on the power of heat source. In this work, 10-Watt LED with the 58 0
C operating temperature was used. The aim for this study was to add extruded-fin heat sink to dissipate heat generated by the LED, with target temperature of LED decreased down to 50 C. Initial experiment was done to check the LED operating temperature and then ANSYS ICEPAK was used for numerical simulation; ANSYS ICEPAK is computational software for the study of thermal management of electronic devices and systems. For the present study, the numerical simulation of LED using extruded-fin as heat sink was performed. Through numerical simulation accounting for the variations in fin heights, fin thicknesses, fin pitches, and base heights, the optimal dimension of the heat sink was determined to achieve the target temperature of 50 C.
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