Water cooling system

glycol waterfor cabinetsdata center

Product Overview
The Liquid-to-Liquid CDU is a compact, 19-inch rack-mountable cooling distribution unit engineered for modern high-density AI data centers. It provides isolated, contamination-free liquid cooling for IT equipment up to 65 kW heat load using a high-efficiency liquid-to-liquid plate heat exchanger to connect data center chilled-water loops with server coolant circuits.

Core Technical Advantages

• Isolated Dual-Loop Architecture — Physically separates the primary chilled-water loop from the secondary equipment-coolant loop to deliver low-pressure, clean coolant to servers and prevent corrosion, scaling and blockages.
• Flexible Deployment & Integration — 19-inch rack-mounted format supports in-cabinet installation or dedicated CDU cabinet deployment for centralized or distributed cooling strategies.
• Redundant Design for 24/7 Reliability — Dual-pump 1+1 redundancy removes single points of failure in fluid circulation; dual-power 1+1 redundancy ensures uninterrupted power to critical electronics.
• High-Efficiency Filtration & Heat Exchange — Integrated 50 μm cleanable secondary filter with low pressure drop; full-copper welded plate heat exchanger in S316 stainless steel for efficient thermal transfer (typical delivery 50 kW with ~4 °C primary-secondary delta).
• User-Friendly Installation & Maintenance — Rear stainless-steel quick-flange/quick-connectors for secure, fast integration; supports constant differential-pressure and constant-flow control modes with manual and forced control options.
• Smart Monitoring & BMS Compatibility — Real-time health monitoring, alarms and multi-protocol connectivity (Modbus/RS485, TCP/IP, SNMP) for integration with BMS and cabinet management systems.
• Energy-Efficient Operation — Typical unit power consumption below 700 W at 50 kW cooling capacity; supports warm-water cooling to enable lower PUE operation.

Product Specification
Nominal cooling capacity: 50 kW
Secondary-side flow (machine external residual pressure 1 bar): 100 LPM
Secondary coolant: Ethylene glycol / propylene glycol solutions (PG25) and compatible single-phase fluids
Primary coolant: Water or ethylene glycol solution
Redundant water pump: 1+1 redundancy
Typical pressure drop (one side): 0.8 bar (80 LPM, 20% ethylene glycol)
Secondary coolant temperature range: 10–45 ℃ (dew point control)
Design delta-T example: 50 kW, 4 ℃ differential
Maximum power consumption: <700 W at maximum flow
Dimensions & weight: 175 × 445 × 900 mm, dry weight 65 kg
Acoustic level (3 m): <58 dBA
Power supply: AC single-phase 85–265 V, 50/60 Hz
Dual power supply: redundant option available
Primary connection: sanitary-grade 1-1/2" chuck
Primary solution volume: 6 litres
Secondary connection: sanitary-grade 1-1/2" chuck, optional quick-connect
Secondary filter: integrated 50 μm cleanable filter
Secondary solution volume: 10 litres
Flowmeters: primary and secondary flow measurement
Pressure sensors: secondary return and supply pressure, filter differential, system differential
Temperature sensors: primary inlet, secondary supply (1+2 redundancy) and return
Other sensors: room temperature and humidity
Water make-up & venting: automatic make-up pump, manual vent
Expansion tank: 1-litre expansion tank
Communication: RS485 RTU Modbus, TCP/IP, SNMP

Technical Specifications

• Model type: Stainless-steel rack-mounted liquid-to-liquid CDU, 19-inch form factor
• Cooling capacity: 50 kW nominal
• Secondary flow capability: 100 LPM (typical 80 LPM)
• Maximum input power (unit): <700 W at max flow
• Operating secondary coolant: Ethylene glycol / propylene glycol mixtures (PG25 supported)
• Redundancy: 1+1 pumps and dual power supply
• Connections: Sanitary 1-1/2" chuck (primary and secondary), optional quick-connect
• Filtration: Integrated 50 μm cleanable filter
• Physical size: 175 × 445 × 900 mm; dry weight 65 kg
• Acoustic level: <58 dBA at 3 m
• Power input range: AC 85–265 V, 50/60 Hz
• Monitoring & interfaces: Multi-sensor set (pressure, temperature, flow, environment) and RS485/TCP/IP/SNMP connectivity