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The Online Publication and Book Series Dedicated to the Thermal Management of Electronics

Qpedia Thermal eMagazine was launched in 2007 as a monthly newsletter focused on the thermal management of electronics. Now in its 9th year of publication, Qpedia is a highly respected monthly magazine that is distributed at no charge to over 18,000 engineers. Written and published by the engineers of Advanced Thermal Solutions, Inc., Qpedia is a technical resource to help the engineering community solve the most challenging thermal problems. Each issue provides practical approaches to thermal management challenges and explains the new technologies for successfully cooling today and tomorrow’s hot-running electronics.

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Table of Contents - July 2010

Current Issues

July 2010

Features

 

 

Evaporative Cooling in Thermal Management

Evaporative cooling is based on a physical phenomenon in which the evaporation of a liquid (usually water) into the surrounding air cools an object or a liquid in contact with it. When the liquid turns into gas, it absorbs heat through a phase change process. The amount of heat absorbed is called the latent heat of evaporation.

 

Electro-osmotic Pumps for Thermal Management

Electro-osmotic pumps use the electrical double layer (EDL) characteristics of a conductive fluid on a solid boundary. They move the fluid using the Coulomb force induced by an electric field via a mobile electric charge in the fluid solution.

 

Flow Bench Measurement of Fan and System Curves in Air-Cooled Electronics

A flow bench is used to determine the curve of a fan or the system curve of an enclosure. It can also provide a controllable and measurable air flow through electronic equipment undergoing thermal testing. A typical flow bench includes a blower, instrumentation and a combination of nozzles. The choice of components will determine the flow rate measurement range and maximum pressure.

 

Magnetic Levitation Fans

The mechanical bearing is a prime source of fan failure in electronics applications. It is typically the limiting factor in an MTBF rating. A novel improvement on the typical fan bearing arrangement is said to reduce two common shortcomings of fans: operation friction and noise.

 

Cooling News

New products, services and events from around the industry.