Thermolectric cooling supplier TECA has announced new three-phase thermoelectric air conditioners. Offering high performance and efficiency, the new maintenance-free air conditioners do not require filters, coolant or chemicals of any kind. Each has a built-in temperature controller equipped with Eco-Mode, an energy-saving temperature control feature that turns the air … [Read more...]
Controlling Thermal Conductivity to Improve Energy Storage
Researchers at the University of Illinois at Urbana-Champaign have experimentally shown for the first time that the thermal conductivity of lithium cobalt oxide (LixCoO2), a material used in the cathodes of lithium-ion batteries, can be reversibly electrochemically modulated over a significant range. Many technologies require control over the flow of heat through materials in … [Read more...]
Thermal Facts and Fairy Tales: Historical Suggestions for Thermal Management of Electronics
Jim Wilson, Engineering Fellow Raytheon Company I have a small book in my office labeled “Suggestions for Designers of Navy Electronic Equipment, 1970 Edition” that was given to me several years ago by the editor at microwaves101.com (which happens to be a useful website if you are interested in microwave topics). The introduction states that any or all of this information is … [Read more...]
Built-in Heat Spreading for Efficient Thermoelectric Cooling of Concentrated Heat Loads
Jeff Hershberger, Robert Smythe, Xiaoyi Gu and Richard F. Hill Laird Technologies, Inc. INTRODUCTION Thermoelectric cooling is an active thermal management technique. A thermoelectric cooler (TEC) has two circuit boards which are typically Al2O3 plates with copper circuit traces attached to them and semiconductor elements soldered between them. TECs are now available … [Read more...]
Solder Joint Lifetime of Rapidly Cycled LED Components
Wendy Luiten Philips Research, Eindhoven, the Netherlands INTRODUCTION Active LEDs in a consumer TV product are boosted and dimmed with the video picture content. Boosting and dimming of the LEDs is a powerful means to improve visual experience, either through application of active LEDs in an ambient light feature, or through dimming and boosting of the display LEDs in a … [Read more...]
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