Boston Anna Pascal GPU server used at ISC Student Cluster Competition 2017


facility by filling the rack,’ said Hopton. ‘Total-Liquid-Cooling is much


more adaptable, it doesn’t need a clean room and doesn’t care about airflow – one could argue its “room neutral”, so it can be installed into any facility where there is power, some even grey spaces or closets. Tis makes this suited to data centres that have stranded capacity, space or efficiency issues, new builds, modules or edge computing.’


What do you think will drive the biggest change in cooling technology during the next five years? Te challenge with all these technologies is that datacentres move a lot slower than hardware does,’ explained Dean. ‘You replace your IT every two to five years. Tere are a lot of examples where we are delivering this brand new kit into a datacentre infrastructure that is 20 to 30 years old. Dean said that a node-based


or direct contact water cooling approach is fairly straightforward to integrate with existing data centre infrastructure, so he expects that this will be the technology with a lot of potential in the coming years: ‘In HPC we push everything harder, we use more electricity, we create more heat than other sectors, so whereas we readily adopted water-cooled doors over the last five years, I now see that technology moving into the enterprise [sector]


www.scientific-computing.com l


and then HPC starting to move to the next generation of cooling technology such as “to-the-node” water cooling,’ said Dean. According to Boston’s Michalski,


the ‘growing demand for high- density servers and increasing thermal design power of server components, such as CPUs and GPUs, makes the standard air cooling work no longer efficient. ‘Today’s servers can output


more than a few thousand watts of heat, which is then getting cooled by air-conditioning – this is a massive waste of power and not a good thing for the environment. Tis is the reason why most new datacentres have adapted liquid cooling technologies with liquid-to- liquid heat changers. Tis way heat produced by server components is transferred to the water, which then can be reused for heating the office, which results in lower OPEX and is better for environment.’ Whitmore highlighted the


increasing density of HPC systems as a driving force for change in the future. ‘Te next generation chips such as CPU’s and GPU’s will allow computers to generate immense amounts of data in a fraction of the time when compared to today’s computers,’ said Whitmore. ‘Tese systems will reject heat


at levels never seen in data centres before. Te trend to big data will continue to drive the adoption of high-performance computers and other dense IT equipment into pre- existing enterprise and colocation datacentres,’ Whitmore said. l


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