The development and performance of the high-power LED radiator

The performance of a kind of pure aluminum heat sink with radicalized straight fins and a kind of aluminum heat sink with heat pipe are investigated through numerical simulation method. Based on the correctness of numerical simulation model verified by the experiment, the optimal design is preceded. The correlations for Nu without and with heat pipe are obtained. Results show that the junction temperature of LED components is efficiently reduced by raising the radiator height (100-200 mm), increasing the number of fins (16-32), increasing the fin height respectively and the limitations are strengthened at the same time. The influence of fin thickness considered in this paper on Nusselt number of the radiator is less than 1%. By the introduction of the heat pipe, the equivalent coefficient of rolled aluminum heat pipe composite radiator fin upper part increased from 70.8% to 73.1%, temperature difference between the top and bottom fins is reduced, heat dissipation is strengthened. At the same time, the increase of the length of heat pipe radiator is favorable to the heat dissipation of radiators and the reduction in radiators weight. Those all provide the theoretical basis for the design and prioritization of high-power LED module radiator.