You are likely aware of the industry buzz and discourse on generative artificial intelligence (AI) and the impact on our data center industry.
Perhaps you have read an article about it, or even read through the AI infrastructure demands outlined in the latest issue of DCD’s magazine. The wave of demand that AI will likely generate will push compute densities even further past what has been forecasted.
With the significant amount of computational power that AI requires, the power consumption of the next generation of hardware will in turn create significant amounts of heat. This heat causes performance issues and can lead to IT device hardware failure if it is not cooled within operating limits.
For those facility operation teams deploying high-density solutions for any emerging tech, be it AI, or low latency streaming and gaming, tackling the thermal management challenge is paramount.
When looking at the infrastructure required for deploying the high-performance compute that generative AI demands, we find liquid cooling systems offer a compelling case as the premier solution for addressing the high-heat problem that air-cooling cannot efficiently manage.
In the 2022 Data Center Liquid Cooling Market Analysis report from Omdia, the market growth is expected to top $3 billion by 2026, and the analyst group expects the combination of air-cooled and liquid-cooled systems will become commonplace in data centers in the near future.
With AI now a trending topic among the average consumer, companies looking at including emerging technology in their operations will benefit from reviewing the liquid cooling options available today that can scale for tomorrow.
Most liquid cooling deployments today involve retrofitting existing server racks in an air-cooled facility, starting with solutions such as a rear-door heat exchanger (RDHx).
Taking up zero additional floor space in the data center, a RDHx is a great option to introduce liquid cooling architecture into the data center without overhauling the entire white space.
These heat exchangers are offered in configurations using different cooling mediums: refrigerant-based, chilled water, and glycol.
Additionally, the setup for an RDHx will use either passive or active cooling fans to draw the air through the heat exchange coil.
Introducing this technology into the data center also offers a ‘room-neutral cooling solution,’ meaning the air temperature exiting the RDHx is near the ambient room temperature, putting less strain on your perimeter cooling units.
An RDHx is a great solution for adding higher-density racks into a data center landscape that is looking to scale into liquid cooling. Starting with a passive rear door today can help you scale for tomorrow when your densities increase.
An RDHx also offers a gateway into liquid cooling, but many organizations are looking for a more focused solution for their clusters. When looking into the configuration options for a non-retro-fitted liquid cooling deployment, the focus falls on two main approaches: immersion cooling and direct-to-chip cooling.
Direct-to-chip liquid cooling involves a design focused on direct coupling of a cold plate to the high heat components, CPU, GPU and in some cases memory modules and power supplies.
Direct-to-chip cold plates sit atop the board’s heat-generating components to draw off heat through either single-phase cold plates or two-phase fluids. These cooling technologies can remove about 70-75 percent of the heat generated by the total equipment in the rack, leaving 25-30 percent that can be readily removed through air-cooling systems.
Immersion cooling is a promising technology that can remove 100 percent of the heat to liquid. There are complexities when dealing with dielectric fluids and it is a radically different cooling approach than the traditional air-cooling method for operational teams to manage.
Single-phase and two-phase immersion cooling systems submerge servers and other rack components in a thermally conductive dielectric liquid or fluid, reducing the demand on air cooling altogether.
Liquid cooling versus air cooling: How thermal management systems are evolving
There are, of course, some challenges associated with liquid cooling. The main concern is the risk of leaks or other failures that could cause damage to the critical hardware. However, with careful design and implementation, these risks can be minimized, and the benefits of liquid cooling can be realized.
Data center operators must be ready to turn to liquid cooling to stay competitive in the age of generative AI. The benefits of liquid cooling, such as enabling higher efficiency, greater rack density, and improved cooling performance, make it an essential approach for organizations that want to incorporate cutting-edge technologies and meet the cooling needs of the resulting high-density workloads.
For what’s next in liquid cooling, read the Cooling Transformation eBook from DCD and Vertiv.
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