FAQ

FAQ list

1. What is a Coolant Distribution Unit (CDU) A CDU distributes and regulates coolant between a data center’s main cooling system and individual server racks, controlling temperature, pressure, and flow for precise liquid cooling.

2. How does a CDU work?It separates the facility cooling loop from the IT-side loop via a heat exchanger, then pumps coolant to racks while continuously monitoring temperature and pressure to prevent leaks.

3. What is an active rear-door heat exchanger (RDHx)?
An RDHx mounts on the back of a server rack and removes heat directly at the source using active fans and coolant — no redesign of the data center’s cooling architecture required.
4. What is modular cooling?
Modular cooling builds capacity as independent units that can be added as needed, instead of one large central system — making it easy to scale and reducing downtime during service.
5. How do you size cooling for a scalable data center?
Sizing is based on expected heat load per rack and future growth. Modular solutions like RDHx and CDU let you start small and expand capacity without redesigning the system.
6. Can NGC handle AI and HPC workloads? Yes. Our systems are built for dense environments and support up to 160 kW per rack — ideal for AI and HPC.

7. How much energy can I save? Up to 90% compared to traditional air-cooled baselines, achieved through distributed rack-level pumping, optimised fluid flow, and precise thermal control.
8. Can NGC be retrofitted? Yes. All solutions are retrofit-ready and integrate directly onto existing racks — no raised floors, special containment, or major infrastructure changes required.
9. Where are NGC systems made? Designed in Denmark, produced and tested in the Czech Republic. All components are EU-sourced, including Grundfos, Alfa Laval, and Stäubli.
10. What if a unit fails? Neighbouring NGC coolers compensate automatically, keeping room temperatures stable and ensuring continued uptime without manual intervention.
11. How fast is the response time? Below 0.5 seconds. The system stabilises thermal behaviour during sudden load shifts — from idle to maximum cooling in less than one second.
12. What supply and return temperatures does the system operate at? NGC systems operate with supply temperatures of 22–30°C and return temperatures up to 56°C. The high return temperature enables heat reuse for district or local heating and reduces dependence on mechanical cooling.
13. What pPUE does NGC achieve? pPUE levels below 1.1 are standard. Under real operating conditions, levels as low as 1.004 have been demonstrated — 1.035 for the full cooling solution.
14. Are NGC systems regulation-compliant? Yes. Fully compliant with EU energy, safety, and environmental standards.
15. Who uses NGC solutions? AI data centres, HPC environments, colocation providers, and enterprises seeking high efficiency, stability, and sustainability.
16. Is maintenance complicated or frequent? No. NGC systems are designed for low maintenance with long-life components and remote monitoring for predictive service.
17. Can NGC work with existing monitoring systems? Yes. NGC supports open protocols and integrates with most DCIM and BMS platforms for real-time insights and control.