GPU WORLD · GW-LC-CDU-130L
130 kW planning class liquid-to-liquid rack CDU
Application engineering reviewEvaluate a CDU for a dense AI rack at the facility-water and equipment-loop operating points. Selection depends on the actual liquid load and required service continuity.
Fit and compatibility
- Confirm the exact rack and tray configurations, coolant interfaces and liquid-versus-air heat split. Provide the manufacturer’s allowable coolant temperatures, flow and pressure limits.
- Confirm facility-water supply at worst conditions, including simultaneous demand from other racks. Review installation clearances, power, controls and maintenance access.
Scope of supply
- Define the selected CDU, rack headers, expansion and fill provisions, isolation, leak monitoring and telemetry. Identify where facility piping and controls begin.
- Agree on the pump and power redundancy requirements, spares and service plan. Request supplier performance maps and the documented capacity under the specified failure conditions.
Operating conditions
- Use 130 kW as a planning class and select from measured capacity at the intended approach temperature, coolant and flow. Verify the pump operating point against the complete equipment loop.
- NVIDIA specifies up to 142 kW for its GB300 NVL72 reference rack. That is full rack power, so obtain the actual heat transferred to liquid and the remaining air heat before selecting the CDU.
- Calculate the required duty with expected concurrent loads and the agreed redundancy strategy. Verify the coolant temperature and branch flows the system can maintain during a planned outage.
Acceptance checks
- Measure heat transfer, approach temperature and branch flow at the agreed design load and facility condition. Verify room cooling for the residual air load.
- Demonstrate specified pump and power switchover, leak detection, alarms and the approved response to loss of cooling. Record the operating limits and test results for handover.
Technical references
Use these references to identify the platform and design requirements. GPU WORLD confirms the applicable assembly and operating conditions for each project.
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