Rear Door Heat Exchangers Solve High-Density Rack Heat Removal

Passive to 30 kW and EC-Fan Active to 85 kW: Why Inlet Water Must Stay Above Dew Point, and Why Selection Follows Air-Water Heat Balance Not Quoted Capacity

A 35 kilowatt AI training room with in-row air conditioners ran 38 degree exhaust and PUE 1.7 until a chilled water coil rear door captured heat before it entered the room, dropping exhaust below 28 degrees and PUE to 1.35. Passive units rely on server fans for 20 to 30 kilowatt racks, active units add EC fans reaching 30 to 85 kilowatts. Chilled water is simple but risks leaks into the rack, refrigerant designs keep water out through a thermosiphon or pump loop, and inlet water stays above room dew point at 18 degrees. EXTRCOOL provides one-stop liquid cooling solutions.

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Area 51, NV, USA

EXTRCOOL INDUSTRY LIMITED

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CDU at the Core of Liquid Cooling Data Center Thermal Management

30-to-40% of System Cost, 2.6-to-3 MW in Mass Production: How 316L Plate Exchange, N+1 Pumps and Three-Tier Leak Protection Hold ±0.2°C

The cooling distribution unit sits at the center of liquid-cooled thermal management, accounting for 30 to 40 percent of system cost by linking cooling towers, dry coolers and chillers to the secondary server loop through a brazed 316L plate heat exchanger that keeps high-purity deionized water apart from industrial water while handling heat exchange, isolation, precise ...

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EXTRCOOL Builds In-House Manufacturing Capability for Liquid Cooling Cold Plates and Manifolds

Flow Channel Precision, Helium Leak Detection and a Unified Interface Datum: How Outsourced Component Manufacturing Closes the DFM Gap Between Design and Delivery

Cold plates, manifolds, connectors and pipes carry barriers in structural design, precision machining, welding and reliability testing, and project delivery faces process control difficulty, capacity fluctuation, supply interruption risk and a DFM gap between design and manufacturing. EXTRCOOL takes outsourced manufacturing of AI compute liquid cooling components with in...

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Manifold Design in Liquid Cooling: Flow Balancing, Structure and Supply Chain

Deviation Under 10%, Orifice Drop at 30-to-50% of Total and 0.1-mm Internal Channels: Why Precision Manifolds, Not CDUs, Are the Schedule Bottleneck

A manifold distributes coolant from the CDU to each cold plate and collects heated liquid back, and the core problem is flow balancing not water splitting, since header pressure changes cause maldistribution, throttling one server and starving another. Standards hold branch flow deviation within 10 percent and imbalance under 15 percent. Three structures: straight-throug...

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