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Discussion of Thermal Management
The electronics industry has made tremendous progress in recent years to become an integrated part of our daily lives.Progress has come on two main fronts: increased functionality in a single device and miniaturization of devices. Both ofthese developments have increased power and energy required or produced, thus increasing heat and the need forthermal management within devices.
There are many different methods to remove or transfer heat energy. Desktop PC’s tend to use aluminum heat sinks withfans. Notebooks utilize heat pipes and thermal interface materials to connect a heat source to a metal chassis inconjunction with fans. More recently, synthetic and natural graphite has been used in enclosed environments such assmartphones, tablets, hyper-slim ultrabooks and other electronics-oriented devices where fans are limited or cannot beused due to space, environment or noise constraints.
Sealed system thermal management is a new and difficult topic when discussing heat dissipation due to system design.In an open system, we can easily use air circulation to exchange heat to the environment. Sealed systems, however,typically have no room for tall heat sinks and inherently do not allow air circulation within the device. The most commonthermal management technique in a sealed system uses a thermal spreader or shield, typically made of graphite, to eitherincrease the available surface area with which to spread a hot spot, or, in conjunction with an air gap, shield a sensitivecomponent from a heat source.
Boyd’s discussion of
Thermal Management
will include various thermal applications within a host of diverse devicesand end markets.
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