Views: 0 Author: Site Editor Publish Time: 2026-11-02 Origin: Site
At CSTHEATEXCHANGER, we design and manufacture industrial-grade 1000kW (1 MW) Central Floor-Standing Coolant Distribution Units (CDUs) engineered specifically for hyperscale AI data centers, supercomputing pods, and high-density GPU server halls (NVIDIA GB200 NVL72 / H100 / H200, AMD MI300X clusters). Built as a heavy-duty, skid-mounted mechanical platform serving 10 to 25 high-density liquid-cooled compute racks, our 1000kW CDUs provide complete hydraulic isolation between the primary Facility Water System (FWS) and the secondary Technology Cooling System (TCS) using dual multi-circuit AISI 316L stainless steel or Titanium Brazed Plate Heat Exchangers (BPHE). Featuring N+1 or 2N redundant variable-frequency centrifugal / canned-motor pump skids (1,200 to 2,400 L/min flow capacity), duplex 50 μm high-flow basket filtration, automated microbubble deaeration, and Redfish / Modbus / BACnet telemetry, CSTHEATEXCHANGER 1000kW CDUs deliver an ultra-tight thermal approach temperature of 2.0K to 3.5K, maximizing year-round 100% free cooling with zero chiller power at sub-1.02 PUE.
As modern AI clusters concentrate megawatts of computing power into tight data hall footprints, a centralized 1000kW floor-standing CDU provides a unified, highly efficient thermal distribution hub for an entire pod:
CSTHEATEXCHANGER® 1000kW (1 MW) CENTRAL FLOOR CDU SCHEMATIC
=================== PRIMARY FACILITY WATER SYSTEM (FWS) ===================
[ Facility Supply: +30°C to +40°C (Dry Coolers / Cooling Towers) | DN150 / 6" Flange ]
│ ▲
DN150 Modulating 2-Way Valve FWR Return to Utility Header
│ │
▼ │
┌────────────────────────────────────────────────────────────────────────────┐
│ CSTHEATEXCHANGER® DUAL PARALLEL BPHE EXCHANGER PACK (1000 kW THERMAL CORE) │
│ • AISI 316L Stainless Steel / Titanium Corrugated Plates (1.5K - 3.0K Appr.)│
│ • Complete Hydraulic Separation; 0% Cross-Contamination; Burst > 100 bar │
└─────────────────────┬────────────────────────────────┬─────────────────────┘
│ ▲
Cold Coolant Supply: +35°C to +45°C Warm Return: +50°C to +65°C
│ │
▼ │
┌──────────────────────────────────────────────────────┴─────────────────────┐
│ N+1 REDUNDANT HIGH-FLOW INDUSTRIAL PUMP ARRAY & WATER CONDITIONING │
│ ┌───────────────────────────┐ ┌───────────────────────────┐ │
│ │ PUMP 1: PRIMARY VFD DRIVE │ ◄─► │ PUMP 2: STANDBY VFD DRIVE │ (2N Ready) │
│ │ Flow: 1,200 - 2,400 L/min │ │ Bumpless Auto-Failover │ │
│ └───────────────────────────┘ └───────────────────────────┘ │
│ • Duplex 50 µm High-Capacity Filter Skids with Differential Pressure Alarm │
│ • Automated Micro-Deaeration Tank & Nitrogen-Pressurized Expansion Vessel │
└─────────────────────┬──────────────────────────────────────────────────────┘
│ ▲
▼ │
================ SECONDARY TECHNOLOGY COOLING SYSTEM (TCS) ================
[ Data Hall Secondary Header: 10 to 25 Liquid-Cooled AI GPU / HPC Server Racks ]A single 1000kW floor CDU replaces dozens of individual in-rack cooling units, consolidating pumps, filters, deaerators, and instrumentation into a single maintenance bay. This frees up 100% of internal rack space (up to 8U per cabinet) exclusively for high-value revenue-generating GPU compute blades.
Engineered with heavy-duty stainless steel distribution headers (DN125 to DN150), our 1000kW CDUs deliver precision flow distribution across hundreds of cold plate micro-channels with ultra-low internal hydraulic friction (ΔP<35 kPaΔP<35 kPa).
In a 1000kW AI cluster representing millions of dollars in compute infrastructure, continuous operation is non-negotiable:
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CST 1000kW CENTRAL FLOOR CDU VS. DISTRIBUTED IN-RACK CDUs
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Engineering Feature 10 Distributed In-Rack CDUs CST 1000kW Central Floor CDU
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Total Maintenance Points 10x Pumps, 10x Filters, 10x PLCs Single Centralized Skid in Gray Space
Rack Usable Space (U-Space) Consumes 40U to 80U White Space 100% Zero U-Space Consumed in Racks
Secondary Coolant Inventory High Total Fluid Volume Optimized Central Loop Volume
Pump Redundancy Architecture 10x Independent 1N/N+1 Pairs Heavy-Duty N+1 or 2N VFD Pump Skid
Filter Maintenance Protocol Requires Opening Every Rack Single Duplex Filter Online Swap
Coolant Distribution Headers Complex Distributed Hoses Robust Stainless Steel Ring Manifold
Acoustic Noise in Server Room Accumulated In-Rack Fan/Pump Enclosed Isolated Mechanical Skid
Energy Efficiency / Parasitic Higher Distributed Pump Power Optimized Large-Impeller Pump VFDs
================================================================================ 1000kW CENTRAL SKID BUMPLESS FAILOVER FLOW CONTINUITY
FLOW RATE (L/min)
2400 ┤
│ ─── PUMP 1 OPERATING (VFD) ───┐ ┌─── PUMP 2 OPERATING (VFD) ───
2000 ┤ │ < 50 ms │
│ └── FAULT ───┘ (ZERO CAVITATION / NO FLOW LOSS)
0 ┤
└───────────────────────────────────────────────────────────────────► TIME (ms)Our 1000kW CDU incorporates dual vacuum-brazed plate heat exchangers configured in parallel. Under normal operations, both cores share the thermal load at minimal pressure drops. During scheduled maintenance, either core can be isolated without shutting down the AI cluster.
Driven by high-efficiency IE4/IE5 variable-frequency motors, our redundant pump array maintains continuous dynamic differential pressure (ΔP) control across server manifolds. Integrated high-speed pressure sensors initiate seamless pump switchovers in <50 ms upon any electrical or hydraulic anomaly.
Maintaining pristine coolant chemistry across 1000kW of micro-channel cold plates requires comprehensive fluid conditioning:
COMPREHENSIVE FLUID CONDITIONING SUITE INSIDE 1000kW CDU
[1. DUPLEX HIGH-FLOW BASKET FILTRATION (50 µm / 20 µm)]
• Dual parallel 316L stainless steel filter housings with continuous ΔP sensing.
• Online manual/automated valve switching allows filter element replacement under full load.
─────────────────────────────────────────────────────────────────────────────
[2. AUTOMATIC VACUUM DEAERATION & NITROGEN BLANKET EXPANSION]
• Continuous separation of dissolved microbubbles to prevent pump cavitation & hot spots.
• Stainless steel expansion vessel accommodates secondary fluid thermal expansion.
─────────────────────────────────────────────────────────────────────────────
[3. SECONDARY WATER SAMPLING & CHEMICAL DOSING BYPASS PORTS]
• Dedicated analytical sample ports for periodic pH, conductivity, and biocide monitoring.(Note: The following engineering parameters represent standard manufacturing design envelopes. Dimensions, port connections, pump head curves, and automation interfaces are customized to specific data center building layouts.)
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CSTHEATEXCHANGER 1000kW CENTRAL FLOOR-STANDING CDU (CST-CDU-1000F)
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Engineering Parameter Standard Manufacturing & Design Range
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Rated Thermal Cooling Capacity 1,000 kW (1 MW) @ 2.5K - 3.5K Approach Temperature
Target Server Infrastructure 10 to 25 High-Density AI GPU Racks / Supercomputing Pods
Heat Exchanger Core Type Dual Parallel Vacuum-Brazed Plate Exchangers (BPHE)
Plate Metallurgy Options AISI 316L Stainless Steel (1.4404) or Titanium Gr. 1
Brazing Material Options Pure Copper (99.9%) or High-Purity Nickel Alloy (BNi-2)
Secondary Coolant Flow Rate 1,200 to 2,400+ L/min (317 to 634+ GPM) Continuously Modulated
Secondary Differential Head 2.0 to 4.0 bar (29 to 58 psi) Differential Pressure
Pump Redundancy Architecture N+1 or 2N Redundant High-Efficiency Centrifugal / Canned Pumps
Pump Failover Switchover Time < 50 ms Instant Dynamic Transfer (Zero Pressure Dip)
Primary Facility Water Temp +25°C to +42°C (Compatible with Free Cooling Dry Coolers)
Secondary Technology Supply +30°C to +48°C (Optimized for Direct-to-Chip Cold Plates)
Secondary Fluid Compatibility Deionized Water (DI-Water), PG25/EG25 (Inhibited Glycol)
Primary / Secondary Port Size DN125 to DN150 (5" to 6") ANSI Flanged or Victaulic Grooved
Filtration Standard Duplex 50 µm (Optional 20 µm) Stainless Steel Basket Filters
Expansion Vessel Volume 100 to 250 Liters Nitrogen-Pressurized Stainless Steel Tank
Telemetry & DCIM Integration Redfish API, SNMP v3, Modbus TCP/RTU, BACnet IP, Dual GbE LAN
Leak Detection & Containment Full Perimeter Stainless Drip Sump + Continuous Optical/Rope Sensors
Quality, Safety & Electrical UL 62368-1, CE / PED 2014/68/EU, ASME Sec. VIII, ISO 9001:2015
================================================================================A 1000kW central floor CDU consolidates maintenance into a single mechanical room or gray space, frees up 100% of server rack UU-space for compute hardware, simplifies primary facility piping (only one main supply/return connection pair), provides higher energy efficiency through large industrial pump impellers, and significantly reduces total cost of ownership (TCO) for large AI data halls.
With an ultra-tight approach temperature of 2.0K to 3.5K, the secondary coolant feeding GPU cold plates (+40∘C to +45∘C) can be chilled by facility water at +35∘C to +40∘C. In almost all global climates, outdoor dry coolers can produce +35∘C water without running mechanical chillers, enabling 100%100% free cooling and driving data center PUE below 1.02.
The CDU incorporates two identical 100% capacity filter vessels piped in parallel with three-way isolation valves. When differential pressure (ΔP) sensors detect particle loading on the active filter, the operator rotates the valve to divert flow through the clean standby filter, allowing the loaded element to be safely serviced and replaced under zero pressure without disrupting secondary coolant delivery to running servers.
Empower your hyperscale AI cluster deployments with mission-critical thermal management from CSTHEATEXCHANGER:
1000kW (1 MW) Megawatt-Scale Central Floor-Standing CDUs
Dual Parallel AISI 316L / Titanium Brazed Plate Exchangers
N+1 / 2N Redundant High-Flow Variable-Frequency Pump Skids
Duplex 50 μm Stainless Steel Filtration, Micro-Deaeration, and Automatic Expansion Systems
Full Redfish API, SNMP v3, and Modbus TCP Data Center Infrastructure Integration
Complete Mechanical Skid Fabrication, CFD Simulation, 3D CAD Modeling & Global Factory Supply
Contact our specialized megawatt liquid cooling engineering team today with your data hall heat load, primary water temperatures, required flow rate (L/min), and piping specifications for comprehensive engineering drawings and factory-direct quotations.
Website: https://www.cstheatexchanger.com/
Technical Inquiries: info@cstheatexchanger.com
