Analysis and engineering notes on AI data center infrastructure — power, cooling, racks and the build-out of compute capacity worldwide.
Coolant chemistry is the fourth operating parameter of a liquid cooling loop, and the only one without a gauge on the CDU. The target windows for PG25, pH, inhibitor and biocide residuals, the testing cadence, the dosing math for reinhibition and top-ups, a...
Read article →A data center water tank is sized as a cooling capacity, not as a volume. The formulas behind the chilled-water TES tank, the make-up water reserve, the NFPA 22 fire water tank and the loop expansion vessel — with a full 5 MW worked example, the deductions ...
Read article →A field-tested CDU maintenance program: daily trend sweeps, weekly coolant and leak walks, quarterly redundancy drills, annual service, glycol chemistry rules and the spares shelf that backs them all up.
Read article →A quick disconnect is the cheapest part in a liquid-cooled rack and the most likely to take it down. How to specify UQD and UQDB couplings so that "OCP compliant" means something: pressure-drop sizing, seal chemistry, blind-mate tolerance, and tested cross-...
Read article →In a market where demand is certain and delivery is scarce, factory-built container modules convert months of construction variance into weeks of schedule certainty. The numbers behind why: 122-day Colossus, 132 kW liquid-cooled racks, and MW-scale capacity...
Read article →Fouling is the only liquid-cooling failure mode that never announces itself: no drip, no alert, just creepingly worse temperatures. The four deposit families, the closed-loop hardness budget, what a deposit layer costs in cold-plate temperature and pressure...
Read article →Rack-mount and cabinet-style CDUs do the same job, but they build completely different rooms around themselves. Capacity bands, piping, redundancy and the flow arithmetic behind the crossover - with two real deployment photos and 12 cited references.
Read article →A step-by-step method for turning a CDU datasheet into a pipe diameter: capacity and secondary ΔT into flow, flow and velocity band into inside diameter, then Darcy-Weisbach and minor-loss accounting to prove the CDU's own pump head covers the loop — with a...
Read article →How the four US classification frameworks compare — Uptime Tier I–IV, ANSI/TIA-942 Rated-1 to Rated-4, ISO/IEC 22237 and BICSI 002 — level by level and subsystem by subsystem, plus the codes that apply on top of every level and what AI rack densities changed.
Read article →Condensation is a temperature-difference problem, not a humidity problem. This guide works through the dew point calculation from first principles — the five-second rule of thumb, the Magnus inversion used in practice, and a fully worked cold-aisle example ...
Read article →Electricity, not silicon, now caps AI data center growth. This analysis works through nine interlocking electrical challenges, the nine evolution paths the power system is taking in response, and the three technology breakthroughs — DC UPS, advanced storage...
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