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Heat Exchanger Technology: Greater Thermal Performance for Greater Thermal Demands

Compact, high-efficiency cabinet-cooling heat exchangers from Aavid Thermacore are successfully meeting the increasing thermal requirements — due to greater miniaturization and computing power — needed for isolated electronics enclosure cooling in a wide variety of high-tech thermal applications: computer, communications, military, medical and test equipment and power electronics, among others.

Heat-exchanger-groupHeat exchangers are ideal for many cabinet-cooling applications, because of their reliability, thermal performance, ability to isolate internal electronics from the external environment, cost-effective operation and small footprint. Aavid Thermacore offers five of the most common and proven heat exchanger core technologies: heat pipe-based cores (HX® Series), air-to-air impingement (HXi® Series), air-to-air cross flow, liquid-to-air and hybrid. We can also custom design heat exchangers for any application requirements including military specifications.

Heat Exchanger Technology

HX Series Air to Air heat exchangers

HX Series Air-to-Air heat pipe-based core technology transfers the energy (heat) generated by the heat source to a flow of cool ambient air passing through an array of heat pipes. The heat is rejected when the now-warmer air is expelled through an ambient air duct. The cooler internal air, after heat is removed through the array of heat pipes, is re-circulated back past the heat source.

These units are capable of meeting NEMA standards, thanks to NEMA 4- and NEMA 12-compliant seals to separate the two air streams. This makes Aavid Thermacore heat exchangers ideal for communications equipment enclosures.

air-to-air impingment core coolingHXi Series Air-to-Air Impingement core technology utilizes a folded fin core that separates the enclosure inside and outside. A set of inside fans draws in the hotter, inside air and blows it toward the fin core. This inside impingement efficiently transfers the heat to the fin core. Similarly, a set of outside fans draws in the cooler, ambient air and blows it toward the outer side of the fin core removing the waste heat. Aavid Thermacore's HXi Series heat exchanger utilizes double-sided impingement cooling technology for maximum thermal efficiency in a compact unit.

liquidtoaircoreLiquid-to-Air Core designs use a closed loop of refrigerating liquid to absorb heat from heat sources and remove it in the circulating liquid. The liquid is carried to a point away from the components being cooled, where the heat is dispersed. These designs are effective in applications where heat dissipation is too great to be efficiently performed by natural or forced-air convection, or where heat must be dispersed at a considerable distance from the heat source.

HXC-IllustrationAir-to-Air cross flow cores combine passive heat pipe technology with energy-efficient cooling fans for economical operation. Hot air from the heat source is passed through a series of heat pipes. The heat is removed and transferred (along the heat pipe wick) to a parallel, opposite-direction current of cooler air, which warms up and is then expelled by fans.

 

HXC1-heat-exchangerHybrid heat exchangers use two separate cooling loops: one for cooling components directly and one to cool remaining residual heat loads within a cabinet. The pumped liquid cooling system is coupled to heat-generating components via a liquid-cooled plate. Coolant is recirculated in the system and heat is rejected by the liquid-to-air heat exchanger. Hybrid heat exchangers can handle multi-kilowatt heat loads and efficiently cool high heat flux components.


 

Thermal management challenge? Take the first step towards the solution for you. Find an Aavid Thermacore technical representative or e-mail info.thermacore@aavid.com for more information on our thermal solution technologies.

 
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