Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
657841 | International Journal of Heat and Mass Transfer | 2014 | 6 Pages |
Abstract
In this study, genetic algorithm (GA) was utilized to optimize the phosphor distribution to decrease the junction temperature of white phosphor-converted light-emitting diodes (pc-LEDs). The key steps of the GA were introduced, including selection, crossover, and mutation. Both the junction temperature and the entransy dissipation of each evolution were calculated. It was found that with evolutions, the phosphor particles tend to build a “thermal bridge” between the chip and the convective boundary and spread along the convective boundary. The junction temperature decreases from â¼157.5 °C to â¼150 °C and the entransy dissipation decreases from â¼18 W K to â¼6 W K. The least entransy dissipation principle was demonstrated to be the rule that governs the optimization processes.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Run Hu, Ting Cheng, Lan Li, Jinlong Ma, Xiaobing Luo,