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单词 Delidding
释义

Delidding

英语百科

Heat spreader

This 120 mm-diameter vapor chamber (heat spreader) heat sink design thermal animation, was created using high resolution CFD analysis, and shows temperature contoured heat sink surface and fluid flow trajectories, predicted using a CFD analysis package, courtesy of NCI.

A heat spreader is a heat exchanger that moves heat between a heat source and a secondary heat exchanger whose surface area and geometry are more favorable than the source. Such a spreader is most often simply a plate made of copper, which has a high thermal conductivity. By definition, heat is "spread out" over this geometry, so that the secondary heat exchanger may be more fully utilized. This has the potential to increase the heat capacity of the total assembly, but the presence of the additional thermal junction will limit total thermal capacity. The high conduction properties of the spreader will make it more effective to function as an air heat exchanger, as opposed to the original (presumably smaller) source. The low heat conduction of air in convection is matched by the higher surface area of the spreader, and heat is radiated more effectively.

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