Microsoft’s Plan to Rewire Data Centers for Space Savings
▼ Summary
– Microsoft is exploring high-temperature superconductors (HTS) to build more efficient, compact data centers and strengthen electrical grids, aiming to reduce their community impact.
– HTS cables conduct electricity with zero resistance, drastically cutting energy loss and allowing for lighter, more compact power lines compared to traditional copper.
– A major challenge for widespread HTS adoption is the complex, costly manufacturing of the specialized tape, which requires cooling and uses materials with a supply chain concentrated in China.
– Growing power demands from generative AI and related fusion research have increased HTS production, lowering costs and making the technology more viable for data center applications.
– Microsoft envisions using HTS both inside data centers to optimize layouts and externally to build narrower, less intrusive long-distance power lines, speeding up grid expansion.
The immense energy demands of modern data centers, particularly those powering generative AI, are pushing the technology industry to explore radical solutions. Microsoft is now investigating a shift toward high-temperature superconductors (HTS) as a potential breakthrough for building more compact and efficient data centers and power grids. This move comes as companies face growing scrutiny over electricity consumption, strained power infrastructure, and the community impact of new construction. Superconducting materials, which allow electricity to flow with zero resistance, could dramatically shrink the physical footprint of these critical facilities and the transmission lines that feed them.
According to a recent blog post by Microsoft’s Alistair Speirs, the company is actively exploring how this technology could strengthen electrical grids and lessen the local impact of data centers. The core promise lies in the fundamental physics: unlike traditional copper wiring, HTS cables can conduct an electrical current without losing energy to resistance. This not only boosts efficiency but also enables cables that are far lighter and more compact. While already used in specialized applications like MRI machines and short urban power lines in cities like Paris and Chicago, widespread adoption has been hindered by complexity and cost.
A significant hurdle is the need for extreme cooling, typically using liquid nitrogen, to achieve the superconducting state. Furthermore, the HTS “tape” essential for these cables is made from rare-earth barium copper oxide. Although only a small amount is needed, the supply chain for these materials remains heavily concentrated, presenting a strategic challenge. Experts note that scaling up manufacturing to make the tape affordable is a primary obstacle.
However, the soaring power requirements of artificial intelligence are beginning to shift the economics. The push for nuclear fusion, a long-sought clean energy source, has already driven investment and production of HTS tape, gradually lowering costs. Husam Alissa of Microsoft points out that this growth in fusion research has helped mature the supply chain, making HTS a more viable consideration for data center applications.
Microsoft’s interest focuses on two key areas. Inside a data center, HTS cables could revolutionize layout and design. With funding from Microsoft, a demonstration by superconducting company VEIR showed that HTS cables could deliver equivalent power with a tenfold reduction in cable dimension and weight compared to conventional options. This allows for greater flexibility in electrical rooms and hardware rack configurations. As Professor Ziad Melhem of Lancaster University states, “The future data center will be superconducting … High power, more efficient, more compact.”
Externally, the company is open to collaborating with energy providers to build long-distance power lines using HTS. Expanding transmission capacity is a major bottleneck for grid modernization and connecting new data centers. The approval process for large-scale infrastructure across multiple jurisdictions is notoriously slow and difficult. HTS power lines could require a fraction of the land, potentially reducing a 70-meter-wide corridor for overhead lines to just 2 meters, thereby cutting both construction time and cost.
This growing interest from the data center sector could create a positive feedback loop for other technologies. Dennis Whyte, a professor at MIT, observes that increased demand could further drive down HTS costs for fusion research, accelerating advances in that field. Microsoft has already signed a deal with a fusion developer in Washington state, highlighting the interconnected nature of these energy innovations. As Whyte notes, the synergy between these applications means the pursuit of more efficient data centers could help propel the entire clean energy ecosystem forward.
(Source: The Verge)
