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They’re Putting Diamonds in GPU Cold Plates. Who’s Watching the Water?
Diamond-enhanced GPU cold plates are making headlines. The harder question is what keeps their performance available after installation. Five questions about coolant, acceptance, baselines, service and ownership.
Read MoreData Center Closed Loop Cooling: Where the Heat and Water Really Go
Data Center Cooling · Liquid Cooling · Heat Rejection Data center closed loop cooling is increasingly common in AI and high-density facilities, but the phrase is often misunderstood. A closed loop tells us that coolant is recirculated. It does not tell us where the heat ultimately goes—or whether another part of the cooling system consumes…
Read MoreAI Cooling Is Becoming a Power-and-Thermal System — Commissioning Has to Catch Up
AI cooling is no longer simply a mechanical system serving an IT load. Power, cooling, controls, and compute are becoming parts of the same operating system. That changes what commissioning needs to prove. For most of my career, facility power and mechanical cooling were treated as separate disciplines. Electrical engineers worried about getting power to…
Read MoreThe Hidden Control-Layer Problem: How PID Loop Performance Can Affect Data Center PUE
KMC² Engineering Case Analysis The Hidden Control-Layer Problem: How PID Loop Performance Can Affect Data Center PUE This six-chiller hyperscale analysis examines how PID tuning, staging logic and synchronized trend data can affect data center PUE—and why system-level verification matters more than any single setpoint. Hyperscale cooling PID loop analysis PUE attribution CRAC / CRAH…
Read MoreBeyond the Cold Plate: The Missing Thermal Control Plane in AI Data Centers
Engineering Research Analysis Thermal Control Plane for AI Data Center Cooling Beyond the Cold Plate examines why GPU and SoC cooling must be evaluated by thermal response, observability, fluid integrity, and recovery—not only by steady-state heat-removal capacity. By Martin P. King · Founder, King Mission-Critical Consulting Public-information and independence note This independent engineering analysis is…
Read MoreMRI Cooling System Failure: The Chiller Never Alarmed
Case Study · Medical Imaging MRI Cooling System Failure: The Chiller Never Alarmed A hidden hydraulic restriction reduced cooling-water flow to a high-use MRI—even while the process chiller stayed online, maintained leaving-water temperature, and showed no refrigeration fault. The chiller appeared normal. Cooling delivery at the MRI was not. Visible Warning Intermittent MRI water-flow alarms…
Read MoreWhy Data Center Equipment Failures Keep Repeating
When data center equipment failures keep repeating, replacing the failed component may restore operation—but it does not necessarily restore reliability. The failed part may only be the final link in a much longer chain of cooling, control, maintenance, and operating conditions. Get the equipment back online. The failed component is replaced. Alarms clear. Temperatures stabilize.…
Read MoreThe Failure Wasn’t Sudden: The Cooling Warning Signs Everyone Missed
Part 3 of 4 — The evidence was there before the downtime Mission-critical cooling systems rarely fail without warning. The evidence often appears weeks earlier in pump speed, valve position, differential pressure, recovery time, and operator workarounds—if anyone knows how to connect it. Forty-three days before the cooling failure, nothing was broken. The following scene…
Read MoreThe Systems That Pass Commissioning but Fail Under Real Operating Conditions
Part 2 of 4 —Accepted is not the same as proven. The commissioning report looked clean. Pumps started. Valves stroked. Alarms came in. The chiller hit leaving-water temperature. The standby unit rotated on command. The checklist was signed, filed, and handed to the owner. Three months later, during the first real heat event, the same…
Read MoreMission-Critical Commissioning: Why “Passed” Does Not Mean Proven
Part 1 of 4 — The Failures That Begin After Sign-Off Why a system can pass startup and functional testing, then fail under the operating conditions that actually matter. A mission-critical compressed dry air compressor failed every four to six weeks for nearly two years. Not because the operations team ignored it. Not because maintenance…
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