The Study and Development of the Performance of the Heat Sinks for High-Brightness Light Emitting Diodes Lamps

Solid-state (Light Emitting Diode, LED) lighting has been one of the promising technology applications in term of energy saving in daily appliances. Other advantages of LED lighting, such as long lasting life, the capability of dimming, low voltage, non-mercury, and compact size, over traditional fluorescence lighting attract engineers’ attention to solve its shortcomings. Among the shortcomings, heat dissipation that affects both emitting spectrum and life is the main obstacle other than price in widely applying LED lightings. In this proposal, the heat dissipation problem in the ceiling mounted LED lighting fixture through natural convection heat transfer is the target problem to solve. In the first year, numerical models will firstly be established according to the existing heat dissipation mechanisms to simulate the heat transfer process. The results of the simulation will be compared with the experimental data for verifying the models. Secondly, other designed mechanisms will be modeled and simulated to evaluate the performance of the mechanisms. Finally, the prototype of the sought optimum design of heat dissipation mechanism will be fabricated and put to test in order to verify the design works. In the second year, the numerical model established in the first years will firstly be used to evaluate the junction temperature (Tj) with various combinations of the design parameters of the heat sink mechanism. The input and output data from the simulations will be used to train an artificial neural network (ANN) that can be used to predict Tj from the design parameters. The results of this project can be published in international journals and used to assist and educate the R&D personals of the related companies in improving the existing products and to provide guidance and references for the future development of new products.

Project ID:PB9808-2384
External Project ID:NSC98-2221-E182-046