|
|
Heat transfer in modern automotive lights
Holec, Radek ; Klimeš, Lubomír (referee) ; Štětina, Josef (advisor)
The beginning of this thesis is dedicated to light in general and all different types of vehicle lightning, also deals with various types of light sources and specifically about LED where it describes the temperature change behaviour. Second part deals with heat transfer by conduction, convection, and radiation, it describes quantities and relationships needed for next capitols. In the penultimate part is described thermal management of headlights, therefore different options of cooling and causes of heat generation, and different types of PCBs that are used in automotive. In the last part is proposed the heatsink, which should be used for cooling LED chips of daytime running lights.
|
|
|
Heat transfer in modern automotive lights
Holec, Radek ; Klimeš, Lubomír (referee) ; Štětina, Josef (advisor)
The beginning of this thesis is dedicated to light in general and all different types of vehicle lightning, also deals with various types of light sources and specifically about LED where it describes the temperature change behaviour. Second part deals with heat transfer by conduction, convection, and radiation, it describes quantities and relationships needed for next capitols. In the penultimate part is described thermal management of headlights, therefore different options of cooling and causes of heat generation, and different types of PCBs that are used in automotive. In the last part is proposed the heatsink, which should be used for cooling LED chips of daytime running lights.
|
|
|
Effect of Heat Transfer Resistance on the Lowest Internal Window Surface Temperature
Vorlíčková, Petra ; Kalousek, Miloš
When assessing the lowest internal surface temperature, it is good to take into account the issue of air flow in the room, which is simply anchored in the form of resistance to heat transfer. The given standard values may in fact vary, and this affects the resulting surface temperatures. In this work, an aluminum strip is applied as a conductive material from the interior to critical points of detail of the window sill of a wooden window and the resistance to heat transfer varies. More precisely, the connection joint is solved for the glazing to the window frame and further for the frame to the wall. We monitor the behavior of the bar with different shapes and thicknesses of material and the depth of the frame in the wall and glazing in the frame. The results showed how much resistance the heat transfer resistance can have on the interior side.
|
guest ::
