Thermal Performance Prediction of A Finned Plain-Plate Heat-Pipe for LED Lamp

In order to keep the temperature of Light emitting diode (LED) lamp below some limitation, a finned plain-plate heat-pipe was presented and numerically investigated to predict heat transfer performance under natural convection. Two kinds of fin configurations were studied. It is found that 30 degrees is the worst orientation for the fin configuration with the tops of every other two channels covered, while the worst orientation is around 60 for the fin configuration with channel tops opened. The thermal conductivity of fin material only has mild effect on the cooling capacity with 7 % difference when its thermal conductivity varies from 50 to 200 W/(m . k). The latter configuration has better thermal performance than the former at the same orientation, especially at relatively low inclined angle.