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FOCUS on COOLING, APRIL/MAY 2012


IMMERSION COOLING


BOLD COOLING EFFICIENCY CLAIMS Iceotope puts its Tier III-designed solution in a cabinet, removing the need for airconditioners, chillers and humidity control systems. Eight hot-swap modules slide in and connect to 12V of power inside a water-distribution unit.


“Our system is ‘hot swap’, clean and dry, using our unique Iceotope valve technology,”


Iceotope says on its website. Overall, it claims the solution can reduce cooling costs by 97% and compute power load by 20%, because it removes the need for air handling and refrigeration, which means no chillers or CRAC/CRAH units are required.


AIR COOLING IS LOW-HANGING FRUIT Leeds University senior lecturer and researcher


for the institute of thermofluids Jon Summers says liquid cooling can be more efficient than air-cooled infrastructure.


“Using air is an easy engineering option, but certainly not efficient,” he said. “The use of liquid encapsulation of the electronics in the Iceotope system offers an elegant engineering solution with a definite efficiency gain.” n


A COMPANY THAT HAS TAKEN THE RISK


The French geophysical services company CGGVeritas has deployed servers immersed in a liquid cooling solution for its high performance computing (HPC) environment in Houston, Texas.


The servers, developed by Super Micro Computer and Green Revolution Cooling, sit in 24 submersion racks as part of a 600kW Carnotjet System, which allows them to be cooled to 40C, eliminating neary all air- conditioning costs. Each rack contains 40 Supermicro GPU SuperServers.


According to Green Revolution Cooling, this is just the beginning. The installation - which has so far resulted in a 40% cooling-cost reduction - is ongoing. The Carnotjet System uses a non-conductive GreenDEF direct coolant, which Green Revolution Cooling said is optimized for cooling servers and other data center hardware. This Dielectric coolant has a light viscosity and high heat- retention ability, according to GRC. “The coolant is essentially baby oil without the


Essentially baby oil fragrance,” GRC says.


Super Micro Computer general manager of HPC Dr Tau Leng said by using the innovative liquid submersion technique developed by Green Revolution Cooling, Supermicro has been able to push the limits of its servers and reduce the amount of power required in the HPC environment.


The vendors said the solution can reduce overall energy consumption by 95% - removing the need for air conditioning and retaining 1,200 times heat than air.


“In conjunction with GRC’s submersion technology we are able to push operational


limits of our GPU-based SuperServers even further while effectively reducing the overall energy requirements,” Leng said. “This joint solution delivers CGGVeritas supercomputing performance with enhanced PUE (1.12 so far) for its unique data acquisition and analysis applications.”


In 2010, Green Revolution Cooling secured its first data center customer Midas Networks, which bought four Carnotjet 42U racks. This installation has since been used as a showcase for the technology.


CGGVeritas works largely with oil, gas and shipping companies around the world.


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