By Dave S. Steinberg
Info infallible strategies for designing digital to resist serious thermal environments. utilizing either SI and English devices all through, it offers equipment for the improvement of varied trustworthy digital structures with no the necessity of high-speed pcs. It additionally deals mathematical modeling functions, utilizing analog resistor networks, to supply the breakup of advanced structures into quite a few person thermal resistors and nodes in case you favor high-speed electronic computing device ideas to thermal difficulties.
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Extra info for Cooling Techniques for Electronic Equipment, 2nd Edition
If large, thin flat panels are used on an electronic box that is to be fan-cooled, make sure that it is not too close to workers. who may object to the acoustic noise that is generated. Structural epoxies are being used very successfully for assembling small electronic boxes. These epoxies have a high peel and shear strength, with a short cure time at 212°F (lOOOC), which makes them very cost effective. Lap joints with large surface areas must be used to obtain the necessary strength at the bonded interfaces.
This heat must be removed to prevent excessive temperatures from developing in these electronic components. The purpose of the electronic chassis is to support the components while providing a low resistance thermal path to a heat sink, which will absorb this waste heat with a minimum rise in the temperature of the components. The heat sink may be the ambient air surrounding the chassis or a liquid-cooled cold plate that is an integral part of the chassis wall. Whatever method of heat transfer is selected, the technique should be as simple and as cost effective as possible.
A vaportight box may be very difficult to achieve, however, if the wrong type of gasket is used. Flat rubber gaskets are easy to use and cheap to fabricate. These gaskets are capable of providing an airtight seal for a large electronic box. A typical flat gasket seal is shown in Figure 2 . 6 . A flat rubber gasket should not be used for boxes that require a water vapor seal. The interface pressure between the flat rubber gasket and its mating box and cover flanges is usually very low, because the rubber is free to deform as the cover screws are tightened.