Singapore Data Center: Modulating Electric Valves Stabilize Chilled-Water Control
A hyperscale-oriented colocation data center in Singapore needed tighter chilled-water control to support AI training racks drawing up to 100 kW per cabinet. Existing 2-position valves caused supply-temperature swings that forced conservative, energy-intensive operating margins.
Project Background
The facility operates roughly 240 cooling loops across multiple computer rooms. As rack densities climbed, the cooling plant could not hold stable supply temperatures at the row level, creating localized hot spots and limiting how much compute the halls could safely host.
Our Solution
DNARENS deployed motorized modulating electric ball valves (PN16, 0–10 V / BACnet) on all 240 loops. Each valve includes:
- Proportional control for precise chilled-water flow balancing
- Spring-return fail-safe to a safe position on power loss
- Position feedback into the DCIM/BMS for closed-loop supervision
Valves were tuned per loop with the BMS PID, and leak-tight shutoff eliminated bypass flow that had been wasting pump energy.
Results
- Supply-temperature stability improved to within ±0.3 °C
- Row-level hot spots eliminated, enabling higher rack density
- Reduced pumping energy through better flow balancing
- Closed-loop valve monitoring cut manual inspection rounds
The upgrade directly supported the data center’s AI-capacity roadmap without expanding the chiller plant.
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