Tag Archives: heat sink

ATS’ Dr. Camil Ghiu to Present at coolingZONE-13

CZ13_speaker_camil

ATS’ own, Dr. Camil Ghiu, will be presenting “Driving Towards 0.1oC/W In Compact Air Cooled Heat Sinks: Advancements In Flow Management And Air Jet Impingement Cooling” at the Thermal Management Industry International Summit: coolingZONE-13. The Summit will be held in Boston, Massachusetts, October 21-23, 2013.

Considering the widespread use of compact systems, such as the 1U platform, and the drive to reduce costs from the system and deployment view points, air cooling continues to be sought for thermal management of such systems. The decrease in size of the new generation of electronic devices imposes a severe constraint on their incorporated thermal management devices. In this context, the development of low thermal resistance heat sinks (0.1 oC/W) for cooling compact electronics systems (1U form factor) continues to be a challenge for the thermal management community.

Dr. Ghiu’s presentation will present recent developments in designing compact heat sinks using advanced air flow management. Two main approaches will be presented, including heat sink design implementing jet impingement and sectional heat sinks. Both design approaches have been explored at ATS, and the experimental data and simulation results will be presented for further discussion.CZ13_HP

coolingZONE-13 is the premiere engineering conference for the thermal management industry. Leading experts from academia and the electronics cooling industry will present emerging technologies in the most crucial areas of thermal engineering. A wide range of topics will be discussed, including liquid cooling, advanced heat sink and heat pipe design, thermal interface materials, data center cooling and analysis, CFD, and vapor compression cooling. Keynote speakers this year are Dr. Vincent Manno of Olin College, Dr. Marc Hodes of Tufts University and Dr. Kaveh Azar, CEO of Advanced Thermal Solutions, Inc. Additional speakers and exhibitors from Laird, CD-Adapco, Aavid, Cradle-CFD, Schneider Electric, and Future Facilities will also be presenting at the conference.

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Latest Qpedia Now Available for Download

Qpedia Thermal eMagazine June 2013

Qpedia Thermal eMagazine June 2013

Qpedia Thermal eMagazine, Volume 7, Issue 6, has just been released and can be downloaded at: http://www.qats.com/Qpedia-Thermal-eMagazine/Back-Issues.

This month’s featured articles include:

Enhancing Heat Sink Performance Using Thermoelectric Coolers

With the increase in the power dissipation of components and the parallel reduction of their size, engineers and researchers across the globe have been predicting that the era of air cooling might come to an end. Even though in some applications, with very high power dissipations such as IGBTs, air cooling may not be adequate and liquid cooling is a must; air cooling will continue to be the first choice for most electronic cooling applications for many years to come. Advances in air cooling continue to extend its use and the implementation of thermoelectric coolers (TECs) in heat sink applications is one such effort.

Immersion Liquid Cooling for Servers in Data Centers

Data center designers and operators have invented many ways to improve the data center’s thermal efficiency, such as optimizing the rack layout and air conditioner location, separating cold aisles and hot aisles, optimizing the configuration of pipes and cables in under-floor plenum, introducing liquid cooling to high-power severs. While the above methods can improve the data center heat load management, they cannot dramatically reduce the Power Usage Effectiveness (PUE). This article reviews two relatively new solutions: active single-phase immersion cooling technology proposed by Green Revolution Cooling (GRC) and a passive two-phase immersion cooling technology proposed by the 3M Company.

Industry Developments: Piezoelectric Cooling

Piezoelectric fans and jets must overcome various materials, thermal and mechanical challenges to become widely used in electronics cooling, but because they consume just 1/150 of the electricity of circular fans, run with little noise and have no parts that will wear out, they remain of great interest. In this article, a number of issues are addressed, including the inverse effect of the piezoelectric phenomena and dual piezoelectric cooling jets.

Technology Review: Innovative Cold Plate Designs, 2007 – 2012

In this issue our spotlight is on innovative cold plate designs. There is much discussion about its deployment in the electronics industry, and these patents show some of the salient features that are the focus of different inventors.

& Cooling News featuring the latest product releases and buzz from around the electronics cooling industry.

Download the issue now.

Not a Qpedia subscriber? Subscribe Now for free at: http://www.qats.com/Qpedia-Thermal-eMagazine/Subscribe-to-Qpedia and see why over 18,000 engineers read Qpedia.

Did you know Qpedia also publishes a book series? The five volume set contains 248 in-depth articles, researched and written by veteran engineers. They address the most critical areas of electronics cooling, with a wide spectrum of topics and thorough technical explanation. Order Now.

Next Webinar: Thursday, July 18 @ 2pm ET

ATS Webinar

Don’t miss the next ATS webinar, “Using Thermal Interface Materials to Improve Heat Sink Thermal Performance”.

This is a free, pre-recorded webinar that will be held at 2pm ET on Thursday July 18th. Attendees will gain a much better understanding on what thermal interface materials are, how they function and how to best use them. The pros and cons of various thermal interface materials is also discussed. This class is from the perspective of the engineer who uses the material not one of the thermal interface material suppliers themselves.

There is no fee to attend, but virtual seating is limited so Register Now

The New Qpedia Thermal eMagazine is Out

Qpedia Thermal eMagazine, Volume 7, Issue 4, has just been released and can be downloaded at: http://www.qats.com/Qpedia-Thermal-eMagazine/Back-Issues.

Featured articles in this issue include:

Dropwise Condensation in Vapor Chambers
Considerable attention has been devoted in the past to the evaporation process taking place in a vapor chamber. However, increased heat fluxes at the condensation end have prompted efforts to improve the condensation performance of the vapor chambers. This article presents a review of a novel method for improving the thermal performance of a vapor chamber condensing section by using special surfaces promoting dropwise condensation.

 

Heat Sink Manufacturing Using Metal Injection Molding

Using Metal Injection Molding It is only in the last few years that metal injection molding (MIM) has gained a foothold in the thermal community and its salient advantages have become more evident. The MIM process allows intricate features to be added into the heat sink design to boost thermal performance and its production process is very scalable compared with machining. Injection molding enables complex parts to be formed as easily as simple geometries, thereby allowing increased design freedom.  This article explore the merits of copper material in the MIM process.

 

Industry Developments: Thermoelectric Modules and Coolers

Thermoelectric modules (TEMs) are rugged, reliable and quiet devices that serve as heat pumps. The real heat-moving components inside TEMs are thermoelectric coolers or TECs. These are solid-state heat pumps and are designed for applications where temperature stabilization, temperature cycling, or cooling below ambient, are required. Today, TEMs are used in electro-optics applications, such as the cooling and stabilizing of laser diodes, IR detectors, cameras (charge coupled device), microprocessors, blood analyzers and optical switches. This article explores some of the latest developments in these devices.

 

Technology Review: Reducing Thermal Spreading Resistance in Heat Sinks

In this issue our spotlight is on reducing spreading resistance in heat sinks. There is much discussion about how this phenomenon can be achieved, and these patents show some of the salient features that are the focus of different inventors.

 

Cooling News featuring the latest product releases and buzz from around the electronics cooling industry.

 

Download the issue now.

 

Not a Qpedia subscriber? Subscribe Now for free at: http://www.qats.com/Qpedia-Thermal-eMagazine/Subscribe-to-Qpedia and see why over 18,000 engineers read Qpedia.

Increased Performance from High Aspect Ratio Heat Sinks

High Aspect Ratio Heat Sinks from ATSA heat sink’s aspect ratio is basically the comparison of its fin height to the distance between its fins. In typical heat sinks the aspect ratio is between 3:1 and 5:1. A high aspect ratio heat sink has taller fins with a smaller distance between them for a ratio that can be 8:1 to 16:1 or greater.

Thus, a high aspect ratio heat sink provides greater density of fins in a given footprint than a more common sink, and/or stands taller than its conventional counterpart. The great benefit from a high aspect ratio heat sink is the increased amount of heat dissipating surfaces it provides due to its additional fins. Further, these heat sinks do not occupy any more length or width. The result is a more efficient heat sink with higher performance per gram in the same footprint.

Many common heat sinks are unable to serve the needs of high volume applications, due to the fact that their cooling capacity – measured in part by the aspect ratio – is simply not great enough. By nearly doubling a heat sink’s aspect ratio the cooling performance is optimized and heat issues resolved without the need for more complex solutions.

Because high aspect ratio heat sinks are manufactured in similar fashion as conventional heat sinks, their cost is not significantly higher. They can be extruded or bonded. Fins can be straight or folded. For omnidirectional purposes a high density of pins can be used as heat spreaders in place of fins.

High aspect ratio heat sinks are often ideal thermal solutions for workstation CPUs, high performance power supplies and converters, and high-end amplifiers.

Of critical importance when using high aspect ratio heat sinks is providing sufficient airflow to carry away the radiating heat. Passive cooling, e.g. conduction and radiation may be inadequate. Convective heat transfer removes essentially all of the energy from a heat sink under forced air cooling. Particularly with dense fin fields, an improperly directed fan may create stagnation points and high pressure loss. Thermal modeling is recommended when determining the needed active cooling resources.