The AI power crisis
A survey of what AI workloads are doing to data centres: cooling past the limits of air, water use, and what to do with the waste heat.
Co-author with Jenil Saliya and Tirth Acharya. Later extended as a solo draft, “Power, Heat, and Water”.
- Per-chip power now exceeded: 1,000 W (source: The AI Power Crisis survey, 2026)
- Rack power typical for AI: 30–50 kW (source: The AI Power Crisis survey, 2026)
- Cooling approaches compared: 5 (source: The AI Power Crisis survey, 2026)
- Sections: 9 (source: The AI Power Crisis survey, 2026)
Why air stops working
The physics of air as a coolant, the chip-power threshold, and how efficiency degrades as fans fight rising temperatures.
The liquid options, compared
Air-assisted liquid cooling, direct-to-chip cold plates, and single- and two-phase immersion, on performance, ten-year cost of ownership and operational risk.
The water problem
Direct evaporation on site, the larger indirect footprint of generating the electricity, and what both do to stressed watersheds.
Cooling without water
Dry cooling architectures, what operators have committed to, and the efficiency price of going water-free.
Using the heat
District heating, greenhouse agriculture and industrial reuse of what is today thrown away.
Rules and optimisation
The ASHRAE thermal guidelines, overcooling, and AI control of the cooling plant itself.
Open problems
The research challenges the field has not solved, as a map for future work.