Tag Archives: QPedia

The Perfect Holiday Gift for Any Engineer

Holiday Sale: 25% Off Qpedia Books

The holidays are a time for giving, but ATS provides the engineering community with educational services year round, offering short courses, tutorial programs and free monthly webinars. In addition, ATS publishes Qpedia Thermal eMagazine, the only monthly publication dedicated to the field of thermal management. Over 18,000 engineers subscribe to the magazine, looking to advance their professional careers, academic studies, or understanding of electronics cooling. Qpedia and coolingZONE are running a holiday sale, discounting Qpedia Books by 25%. The Qpedia Book Series is a must have for every engineer, providing detailed and technical explanations for real life challenges that arise in the professional environment of engineers. The promotion is only until December 31st, so don’t miss your chance to order these invaluable books at a discounted price.

Order Now!

 

Holiday Sale: 25 % Off Qpedia Book Series!

 

coolingZONE is running a holiday promotion on the Qpedia Book Series, discounting 25% off the normal retail value until December 31, 2012. Qpedia Thermal eMagazine is the official media sponsor of coolingZONE. The Qpedia book series provides an expert resource for engineering professionals, professors, students and others who want to learn more about the theories and applications of electronics thermal management.

The four volume set contains nearly 200 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. Each article features color illustrations and images along with important thermal calculations and formulas.

Qpedia Volume 1 topic highlights:

– Heat sink design

– Pool boiling

– Sensors

– Thermal chassis

– Pitot tubes

– Heat transfer

Qpedia Volume 2 topic highlights:

– Thermal grease

– Vapor chamber cooling

– Liquid cooling

– Natural convection cooling

– Phase change materials

Qpedia Volume 3 topic highlights:

– CFD modeling

– PCB optimization

– Jet impingement cooling

– LED cooling

– Cold plates

– Refrigeration systems

Qpedia Volume 4 topics highlights:

– Multilayer mini-channel heat sinks

– Electro-osmotic pumps

– Thermoelectric coolers

– High altitude heat transfer

– Data center cooling

– Defense electronics

– Automotive electronics cooling

Check out the video on Qpedia Volume 4

Over fifteen thermal and mechanical engineers combined their expertise to create the articles in this useful collection, including Kaveh Azar, Ph.D. and Bahman Tavassoli, Ph.D., both of whom are internationally recognized experts in the field of the thermal management of electronics. Qpedia Thermal eMagazine, published by Advanced Thermal Solutions, Inc. (ATS) was launched in 2007 as a technical publication dedicated to the thermal management of electronics.

Filled with careful explanations, step-by-step calculations, and practical examples from real life challenges, this expert collection of articles is a must have for any mechanical, electrical, and thermal engineer or anyone interested in the rapidly growing field of electronics cooling.

Order the Qpedia Book Series with 25% off now at www.coolingzone.com The books can be purchased as a complete set, combination, or individually. Volume discounts for organizations and academic institutions are also available.

September Qpedia Thermal eMagazine Released

This Month’s Qpedia Thermal eMagazine has been released! This issue includes the following topics:
Direct-Bond-Copper Aluminum Nitride Microchannel Heat Sink for IGBT Modules

The advancement in semiconductor technology has coerced engineers into looking for more innovative and effective methods to cool semiconductor devices with increasing power density. The continuing efforts towards the shrinking of the Metal Oxide Semiconductor Field-Effect Transistor (MOSFET) and the Insulated Gate Bipolar Transistor (IGBT) gate size have made it impossible for standard electronics packages and pure air-cooled devices to handle the heat load dissipated by some high-power devices, such as high end CPUs, power transistors, DSP chips, etc.
TEC Selection in Thermal Management

With the push towards reducing component size, increasing power dissipation and lowering junction temperature, engineers must utilize different and more effective means for achieving their goals. Thermo electric coolers (TECs) are one such means to achieve their ends. TECs have been on the market for decades and their application in component cooling can be attractive, if they are designed properly or chosen correctly. Even though their COP is much lower than a Carnot cycle efficiency, they can solve some problems if the fundamentals of a TEC are well understood by the engineering team.
Industry Developments: Thermally Conductive PCBs

A wide range of printed circuit board materials are available for electronic assemblies requiring heat management characteristics (high-power devices, RF and wireless, lighting/LED boards, etc.). In widening use are metal-clad PCBs with a standard dielectric, and metal cores of various thicknesses of aluminum and copper. Providers of these PCBs offer tight machining tolerances and high-quality fabrication services for effective thermal management.
Technology Review: High Performance Heat Transfer Devices

Qpedia continues its review of technologies developed for electronics cooling applications. We are presenting selected patents that were awarded to developers around the world to address cooling challenges. After reading the series, you will be more aware of both the historic developments and the latest breakthroughs in both product design and applications.
Cooling News from Around the Industry

Find out why over 18,000 engineers subscribe to Qpedia and Download your free copy at qats.com!

New Hardcover Collection of Qpedia Electronics Thermal Management Articles Now Available from ATS

How to Calculate Heat Loads for Liquid Cooling Systems

A series of calculations can be used to find the thermal loads in common liquid cooling systems. Calculations of this nature are needed to predict the performance of liquid cooling systems, which are effective but complex thermal management solutions. Several equations must be calculated to fully understand the behavior of a liquid cooled system, and ATS is providing these to engineers via personal instruction and in a paper available free from the company’s website, Qats.com.

IIn the paper, which appears in the company’s e-magazine, ATS considers a liquid cooling system as a closed loop system with three major components: cold plate, heat exchanger and pump. The cold plate is typically made from aluminum or copper, and is attached to the device being cooled. The plate usually has internal fins which transfer heat to the coolant flowing through them. This fluid moves from the cold plate to a heat exchanger where its heat is transferred to the ambient air via forced convection. The final part of the cooling loop is the pump, which drives the fluid through the loop.

A series of equations is provided to predict the final temperature of the device being cooled. The first of these equates the surface temperature of this device with the product of the power dissipated by the device times the thermal resistance of the cold plate (and its thermal interface material), added to the temperature of the water entering the cold plate.

The sequence of calculations factors in specifications from the cold plate, heat exchanger and pump. The result is a solution for the device temperature as a function of cold plate resistance. In the example cited by ATS, a cold plate thermal resistance of less than 18 degrees C/W is required to cool an Intel Xeon 5492 processor in a 25C temperature environment.

Liquid cooling is an important and expanding practice in the electronics industry. It is important to understand the impact on performance of all three major parts of liquid cooling loops (cold plate, heat exchanger and pump) to ensure an acceptable level of performance at the lowest cost.

Instructions for calculating load for liquid cooling systems are available on Qats.com in the pages of Qpedia, the thermal management emagazine from ATS. More information is also available by calling 1-781-949-2522.