Introduction In recent years, high-power, high-brightness Light Emitting Diodes (LEDs) have penetrated into an ever-increasing number of lighting applications. For such devices, maintaining a low die temperature is becoming a huge challenge because of the escalating power density (e.g., 200-300 W/cm2 for the latest generation). Active cooling solutions are rarely considered as … [Read more...]
On The Hate/Love Relationship Between The U.S. And SI
Last year I devoted some words on correligion: the religious belief in the usefulness of correlations to solve real-life problems. I forgot to mention that correlations have one big advantage; they are dimensionless meaning that they are the same for everyone, including people from outside the US. Unfortunately this is not the case for most common units, and the struggle for … [Read more...]
Thermal Conductivity Of Liquid Metals
This column deals with the thermal conductivity and melting points of liquid metals. Thinking about liquid metals, many people associate them with high temperatures. It is not widely known that some metallic alloys are liquid below 0�C, with the exception of course of mercury which was already known in ancient times. China's first emperor is said to have been buried in rivers … [Read more...]
Challenges In Thermal Management Of Memory Modules
The Datacenter Quandary Two significant challenges facing datacenter operators today are increased power and cooling costs [1]. In a recent survey of datacenter operators, 38% of respondents said they considered both power and cooling as equally important; another 21% indicated that cooling was their major challenge; and 12% cited power consumption as a big concern [2]. Another … [Read more...]
en Route to a Greener Thermal Technology
It's no surprise. Power levels in the data center keep rising. In fact, the cost of powering the computers in the data center is beginning to exceed the cost of the computers themselves. The computer architects have responded by designing systems that use multi-core processors. These processors can use less energy to perform the same workload as their single-core brethren by … [Read more...]
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