Author: Faruk Ucur, Vice President, Engineering CHVAC EMEA, Trane Technologies
Every second an AI data center operates, it generates substantial amounts of heat. This heat needs to be continuously removed in order to keep servers running efficiently. Traditionally, this waste heat has been rejected and forgotten. However, with increasing server densities and next-generation chips driving higher power demands, waste heat is no longer just a by product to manage – it’s an untapped energy resource waiting to be harnessed.
Preparing for Growth and rethinking Energy Use in Data Centers
The impact of technology on society is evident in our daily lives, from data analysis to music creation powered by AI as examples. The total power growth demand in Europe is projected to continue growing at an average rate of 15% per year by 2030 a report by EUDCA. This growth necessitates more locations for data centers and sufficient power and water to operate them. At a time when data centers are challenged with limitations in power and water resources, strategic construction, design and resource management are more critical than ever.
These challenges affect all data center operators – including the ones in Europe, where there are even stricter environmental regulations and demands for sustainable practices. EU policymakers have already begun to recognize the critical role of cooling innovations and heat reuse in meeting sustainability goals, as demonstrated by the latest revision of theEnergy Efficiency Directive (EED).
However, despite significant strides, heating and cooling systems are often viewed as siloes. In data centers, cooling systems operate continuously and can require substantial energy to operate. What if data centers and their surrounding systems viewed energy use differently? Instead of focusing solely on the significant power demands of data centers, engineers and policymakers alike are starting to recognize them as integral parts of a larger energy network. Through waste heat recovery and redistribution, data centers can contribute back to this network. The key question is how to utilize this waste energy effectively.
Innovative Uses for Data Center Heat
Large AI data centers are often located far from cities, making the implementation ofextensive piping systems costly and challenging. To unlock this potential, it’s essential tos top viewing cooling and heat management as siloed systems, and switch to an interconnected view of thermal management systems. Instead of focusing on individual components like chillers, pumps, and cooling distribution units, consider their interactions.
The best-performing facilities integrate cooling and heat rejection systems, optimizing thermal management through advanced chiller plant controls. They also rely on intelligent controls and services to monitor performance, detect anomalies, and adapt to real-time loads and weather conditions.
An integrated approach can create valuable ways to repurpose excess heat. Equipment like heat exchangers, water-cooled equipment, thermal storage, and heat pumps can transform low-grade heat into a valuable resource for district heating networks or nearby industries, for example. Low-grade heat could also be used in partnership with other facilities, creating symbiotic systems with data centers. Coordination with cities, district energy plants, and other industries would be required early in the planning process, but the potential for a sustainable future makes it worthwhile.
Europe has been leading the forefront in this integrated design approach. For example, the city of Aalsmeer in the Netherlands is capturing and recycling heat generated by NorthCdatacenters, avoiding nearly 400 metric tons of CO2 emissions annually and saving an estimated 210 MWh of electricity per year. More recently, a Infomaniak datacenter in Geneva, Switzerland, recovers virtually 100 percent of its waste heat and pumps into the city’s district heating network – enough to warm 6,000 homes in winter or provide 20,000 five-minute showers in summer.
Services to Aid in Waste Heat Recovery
Recovering waste heat involves more than just technology and hardware. Systems need to run smoothly, and uptime is critical. Smart tools, including remote monitoring, predictive maintenance, and performance analytics, help detect issues before they escalate. Mechanical equipment will eventually need servicing, and trained and certified technicians provide invaluable benefits, helping to prevent loss and optimize performance.
The Importance of Data Center Efficiency
High performance isn’t just a design goal – it’s a daily advantage that impacts facility operations.
An efficient, well-maintained, and optimized system reduces energy usage, lowers total cost of ownership, and enhances sustainability. With high energy prices and limited water supplies, optimization is increasingly critical. Solutions like dry coolers, hybrid systems, and load-balancing strategies help alleviate pressure without sacrificing performance.
Designing optimized energy efficiency and recovering waste heat isn’t just about saving money. Reducing energy demand on the grid is crucial for today and the future.
Waste Heat Utilization: A Strategic Advantage
Our reliance on technology isn’t decreasing, which means the need for data centers will continue to grow. Thoughtful planning and cooperation with local stakeholders can turn datacenter heat reuse into beneficial partnerships with communities. These relationships will be vital as data centers expand, and energy prices rise.
It’s time to shift the conversation to how we can leverage data center waste heat to benefit nearby buildings and reduce local energy demand. The heat is already there.
