Servers Slow Down as Data Center Heats Up

Some of the racks space inside the Purdue Universioty data center in West Lafayetter, Illinois. Purdue staff have developed a program to put server clusters into power-saving mode during cooling failures.

Purdue University has developed software that can slow server activity as temperature rises, and has used this technique to keep the school’s supercomputing data center operating throughout several cooling failures this summer. Read More

Airflow Utilization Efficiency (AUE)

This paper will provides a detailed understanding of the capabilities and science of raised floor cooling, provide methods for testing tiles and provide a total cost of ownership example. One topic of particular interest is the concept of how to use “River Cooling” to reduce energy costs while improving server performance. Read More

NREL Develops Promising Cooling Technology

NREL senior engineer Eric Kozubal examines a prototype air flow channel of the DEVap air conditioner, which he co-invented. DEVap, which stands for desiccant-enhanced evaporative air conditioner, is a novel concept that uses membrane technology to combine the efficiency of evaporative cooling and the drying potential of liquid desiccant salt solutions. The graph superimposed on the photo shows shows how hot humid air, in red, changes to cool dry air, in blue, as the air passes through the DEVap core.

The U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) has developed a new air conditioning process with the potential of using 50 percent to 90 percent less energy than today’s top-of-the-line units. Read More

IBM’s Hot-Water Supercomputer Goes Live

IBM has delivered an energy-efficient supercomputer cooled by hot water. The Aquasar cooling system uses water at temperatures of up to 140 degrees, and as a result consumes up to 40 percent less energy than a comparable air-cooled machine. Read More

Keeping Cool In The Data Center

A cost-effective, efficient solution for maximizing heat transfer and enabling higher heat density equipment frames can be accomplished by utilizing properly positioned “phase change” or “two-phase” pumped refrigerant cooling methods. Read More

Additional Cooling Articles