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The CoolPower Briefing, issue 2

Microsoft's 1.1 GW Indiana power deal, a delayed AI site, and heat-driven cooling

Sent . This is the web copy of the email as it was sent. Dates, prices and links were checked at the time of sending.

Welcome to issue 2. CoolPower Index tracks data centre power and cooling news, research, events, costs and suppliers from primary sources, vendor-neutral, with a link to every original.

Power and cooling news

  • NiSource signs a 20-year deal to serve Microsoft's Indiana campus with about 1,100 MW of new generation and 600 MW of contracted battery storage (16 Oct). Microsoft funds the generation and transmission for its northwest Indiana campus, with service from 2028. Source: NiSource (opens in a new tab)
  • Nscale's Glomfjord AI data centre reported six months late after cooling leaks and a transformer fire (16 Oct). The report comes from Bloomberg via DCD and is partly disputed by a project source, who says the fire destroyed switchgear but caused no delay. 6.4 MW of a planned 30 MW is operating. Source: DCD (opens in a new tab)
  • Accelsius upgrades its Austin lab for multi-megawatt two-phase liquid cooling tests (16 Oct). The lab can now run racks at megawatt-class loads on warm facility water. A 375 kW-capable multi-rack unit is planned. Source: The Data Center Engineer (opens in a new tab)
  • Flex completes its acquisition of EPC Power (14 Oct). EPC Power joins Flex's Cloud and Power Infrastructure segment, adding grid-forming and 800 V data centre power conversion. Source: Flex (opens in a new tab)
  • DCX builds coolant chemistry control into its 8 MW facility distribution unit (14 Oct). Inline sensors and automatic dosing handle coolant treatment inside the unit. Source: DCX (opens in a new tab)
  • Trane launches LiquidStack CDU 2.X (12 Oct). Flow of up to 3,750 litres per minute at 3.5 bar and facility water inlet up to 45 °C, with pre-orders open and shipments from Q2 2027. Source: Trane (opens in a new tab)

More on the News page.

Innovation and R&D

  • Prototype: Lehigh University stores data centre waste heat in a concrete thermal battery. Finned thermosiphons in a cement-based block store heat for later use in district heating, absorption chillers or power generation. The university reports round-trip efficiency above 70%, with fabrication and assembly validated on a 150 kWh prototype. Source: Lehigh University (opens in a new tab)
  • Prototype: KIT and the University of Tsukuba turn heat into cold with two shape-memory films. No electric motor is needed. The lab prototype reached a 4 °C temperature difference at component level and is a feasibility study, published in Nature Energy. Source: KIT (opens in a new tab)
  • Prototype: Binghamton University steps 48 V down to GPU core voltage in a single stage. Point-of-load converters usually need several stages. The lab prototype is reported to reach 10 to 12% higher efficiency across load conditions with double the slew rate, and less conversion loss means less heat at the board. Source: Binghamton University via Newswise (opens in a new tab)

Browse all items by theme and maturity on Innovation.

Upcoming power, cooling and energy events

Full list with filters and calendar files on Events.

What's new on the site

This issue contains no sponsored content.