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News

Intelligent liquid cooling alternative to air cooling

Aavid Thermalloy : 12 March, 2015  (New Product)
HydroSink from Aavid Thermalloy is an intelligent, Liquid Cooling System which aims to replace existing existing air cooled systems for medium and high power electronics.
Intelligent liquid cooling alternative to air cooling
HydroSink is very compact: its largest component is the heat exchanger which includes a smaller fan compared to other approaches. The estimated life-span of the HydroSink exceeds 50,000 hours, thanks to the control board´s ability to reduce the usage of fan and pump. Therefore it provides higher reliability as there is less stress to components when the system achieves the required performance.
 
HydroSink´s thermal performance relies on the control board to accurately modify fan and pump speed in order to perfectly adapt to operating conditions. It allows the thermal performance to be modified according to boundary conditions at any given moment. It strategically manages the system´s components and sensor signals, ensuring the consistent monitoring of the system´s performance.
 
Four Primary Cooling Mechanisms
 
The graph illustrates the relationship between the Power Dissipated in an application versus Thermal Efficiency. The X Axis indicates the total amount of power to be removed, while the Y Axis can be defined as the relationship of thermal resistance with respect to total power, unit volume, and heat flux density. This tool serves as the starting point for solving thermal problems by narrowing the options. 
 
 
 
Natural Convection applications do not rely on a specified local air velocity for heat dissipation. Typical natural convection heat sinks are passive in nature and manufactured from copper or aluminum sheet, extruded aluminum, machined or cast alloys.
 
Forced Convection applications require forced air velocity generated through the incorporation of either a dedicated or system level fan(s) in order to increase thermal efficiency. Fan heat sinks, high fin density assemblies, as well as board level coolers are manufactured and configured for either impingement or cross flow environments.
 
Fluid Phase Change applications, also known as re-circulating, typically employ closed loop heat pipes which allow the rapid exchange of heat transfer through evaporation and condensation. Heat pipes are integrated into other heat sink technologies to further increase the thermal efficiency when greater density is required or physical size restrictions exist.
 
Liquid Cooled applications comprise channelled cold plates along with a heat exchanger and pump system in order to circulate fluids past a heat source. Generally, liquid cooled technologies are reserved for applications containing high heat flux density where forced convection or phase change systems are unable to dissipate the power demands.
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