Introduction The increasing heat load densities in datacom equipment centers require ever more sophisticated approaches to cooling. Air-cooled systems are now struggling to provide the needed level of thermal performance for many installations and energy efficiency is an increasing concern. In fact, the standard implementation of air-cooled designs results in cooling energy … [Read more...]
Simplified Correlations For Radiation Heat Transfer Rate In Plate-Fin Heat Sinks
Radiation heat transfer can be a significant portion of total heat transfer from a heat sink, particularly in natural convection flows. The enclosures for most natural-convection-cooled indoor and outdoor electronic equipments, such as pole or wall-mount base stations and radio units, include external fins to improve natural convection and radiation heat transfer rates. Early … [Read more...]
Thermal Optimization And Design For Manufacturability Of Liquid-Air Hybrid Cooling Systems
Introduction Existing technologies typically utilize air to carry the heat away from a heat sink that is thermally coupled to the microprocessor. Higher performance devices such as workstations, "gaming" PCs, or tower servers that utilize components with greater power dissipation can require more aggressive cooling technology. A high-performance alternative to heat sinks is a … [Read more...]
2U Rack Mountable Vapor Compression Cooling System For High Power Electronics
Vapor compression refrigeration has long been used to cool telecommunications equipment and some high performance computers. On the whole, however, its usage has been confined to high-value, relatively large, and stationary applications. The advantages of vapor compression cooling (VCC) systems are fairly well known. They can provide heat sinks at below ambient temperatures … [Read more...]
Estimating Dew Point Temperature For Water Cooling Applications
Over the past several years thermal engineers and others in the computer industry have become acutely aware of the challenge of increasing power dissipation and the potential of liquid (principally water) cooling to provide a thermal management solution. A number of articles in ElectronicsCooling have addressed both the issue of increased power dissipation [1-4] and various … [Read more...]
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