GPU RACK & DATA CENTER COOLING
Coolant distribution units (CDUs) for data centers
Compare liquid-to-air and liquid-to-liquid CDUs, then request a quote based on your rack heat load, coolant flow and site conditions.
Liquid-to-air vs liquid-to-liquid
A coolant distribution unit circulates coolant through the equipment loop. The right type depends on how your site can remove that heat.
Liquid-to-air CDU
- Heat rejection. A coil and fans release the heat carried by the coolant into the room air.
- Site fit. Consider it for a lab or rack without facility water at the installation point.
- What to check. The room cooling system must handle heat from the CDU and the equipment that still rejects heat directly to air. Check room air temperature, airflow clearance and the CDU performance curve.
- Planning classes. 8, 12 and 18 kW.
Liquid-to-liquid CDU
- Heat rejection. A heat exchanger moves heat from the equipment coolant loop into a separate facility water loop.
- Site fit. Consider it where facility water is available with suitable temperature, flow and heat rejection capacity.
- What to check. Confirm both loops’ temperatures, coolant compatibility, required flow and pressure drop. Size room cooling separately for equipment that still rejects heat to air.
- Planning classes. 30, 65 and 130 kW.
CDU capacity classes
These are planning classes. Confirm heat rejection at the intended temperatures, flow and pump head before selecting a unit.
| Planning class | CDU type | Model details |
|---|---|---|
| 8 kW planning class | Liquid-to-air CDU | GW-LC-CDU-08A |
| 12 kW planning class | Liquid-to-air CDU | GW-LC-CDU-12A |
| 18 kW planning class | Liquid-to-air CDU | GW-LC-CDU-18A |
| 30 kW planning class | Liquid-to-liquid rack CDU | GW-LC-CDU-30L |
| 65 kW planning class | Liquid-to-liquid rack CDU | GW-LC-CDU-65L |
| 130 kW planning class | Liquid-to-liquid rack CDU | GW-LC-CDU-130L |
Need to estimate load or coolant flow? Use the GPU rack CDU sizing guide.
For design and test methods, see the ASHRAE water-cooled server guidance and the Open Compute Project CDU rating methodology.
Get a CDU quote for your site
Share your project details so GPU WORLD can review the CDU configuration and prepare a USD quote for your destination.
- Server models, number of racks and estimated heat carried by the liquid loop.
- Equipment coolant, supply and return temperatures, required flow and pressure drop.
- Facility water conditions or available room cooling, and project location.
CONFIGURATION & QUOTATIONSRequest a cooling quoteShare your server configuration and site conditions.Request a quote
Plan your cooling project
Our team will review server fit, heat rejection and the scope of supply.