UK Launches Heat Network Zones to Recycle Data Centre Heat: A Step Toward Sustainability

On Friday, the Department for Energy Security and Net Zero (DESNZ) unveiled an ambitious initiative aimed at developing six heat network zones across the UK. This groundbreaking project is designed to recycle excess heat generated by data centres, providing a sustainable solution for local communities while significantly reducing the carbon footprint of the tech industry.

Data centres are notorious for their high energy consumption, primarily due to the cooling systems required to maintain optimal server temperatures. As demand for data processing continues to soar, particularly with the rise of AI technologies, the need for innovative cooling solutions becomes increasingly critical. Philip Kaye, co-founder of Manchester-based data centre firm Vespertec, has long championed the government-backed expansion of heat reuse technology, viewing it as a vital opportunity to support local communities.

Kaye expressed his enthusiasm for the initiative, stating: “These heat network zones are a great way for data centres to give back to local communities. The most effective way to capture heat is by using liquid cooling. Historically, most data centres relied on air cooling. As servers become more powerful, liquid cooling will become a mainstream technology, especially with AI servers. For example, Nvidia’s NVL72 requires liquid cooling.”

He emphasized that “liquid cooling is more efficient than air cooling, meaning liquid-cooled data centres can achieve a lower PUE (Power Usage Effectiveness), making them more sustainable.” The benefits multiply when the waste heat generated by these centres is redirected for alternative uses, such as heating local buildings or infrastructure. Kaye noted, “The environmental impact can be further reduced if the waste heat is reused.”

Kaye elaborated on the technology’s versatility, explaining that liquid cooling can involve either direct liquid cooling or immersion cooling. He highlighted an exciting recent project by Deep Green, which demonstrated the potential of immersion cooling by completely submerging servers in dielectric fluids and using the waste heat to warm a local swimming pool. “Data centres should not be daunted by the requirements for liquid cooling,” he advised. “Retrofitting is not as complicated as it sounds and should provide opportunities for local innovators to help bring the benefits of modern tech to their communities.”

Expressing a personal connection to the initiative, Kaye remarked, “We’re delighted to see our town of Stockport selected for this programme and are looking forward to seeing more of these schemes open up across Greater Manchester and the UK.”

As the nation grapples with the challenges of climate change and seeks to transition toward a greener economy, the development of these heat network zones represents a significant stride in harnessing excess energy for community good. By recycling the heat produced by data centres, the UK is not only addressing its energy needs but also setting a precedent for future technological advancements that prioritize environmental sustainability.

In conclusion, the DESNZ’s initiative is a bold and forward-thinking approach to energy management that aligns with the goals of reducing carbon emissions and supporting local communities. With advocates like Philip Kaye at the forefront, the future of data centres in the UK looks promising, driven by innovation and a commitment to sustainability.