| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 97 === With the fast progress in LED lamp technology, the challenging problem for
a LED lamp is that the high power density of LED in a small area can not be
dissipated from a thermal module efficiently. The study of a LED lamp thermal
module is considered at an outdoor windless environment. The LED lamp it dis-
sipates heat by conduction and natural convection. The conjugate heat transfer
of the LED lamp is simulated numerically under a variety of powers, ambient
temperatures, and horizontal angles. According to the results, suggestion for the
thermal module of the LED lamp is proposed. In the original thermal module,
the junction temperature and thermal resistance is proportional to the power of
LED, ambient temperature, and horizontal angle. The revised thermal module
changes the flow field of natural convection and reduces the junction temperature
and thermal resistance. Nevertheless, the efficiency of the revised thermal module
is not affected by the horizontal angle. As a result, the revised thermal module
enhances the heat transfer of the LED lamp.
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