Icebox Energy provides a water‑free cooling platform for high‑density data centers, using a closed‑loop carbon‑dioxide (CO₂) heat pump to deliver chilled CO₂ directly to compute racks. The system cuts energy use by 30‑60%, eliminates towers and synthetic refrigerants, and integrates with existing chilled‑water infrastructure to support ultra‑dense AI and HPC workloads.
Funding
Funding not disclosed
Founders
Product
Problem
Modern data centers that run AI, high‑performance computing (HPC), and ultra‑dense workloads generate heat densities that exceed the capacity of traditional water‑based cooling systems. Legacy cooling requires large water loops, towers, and synthetic refrigerants, leading to high energy consumption, operational complexity, and regulatory risk.
Solution
Icebox Energy offers an end‑to‑end cooling platform built around a purpose‑designed carbon‑dioxide (CO₂) heat pump. The system adopts an “outside‑in” architecture, placing a centralized CO₂ heat pump in the mechanical yard and delivering chilled CO₂ directly to compute racks. This water‑free approach eliminates towers, water chemistry, and high‑GWP refrigerants while delivering 30‑60 % lower energy use. The platform integrates with existing chilled‑water, RDHx, and CDU loops, allowing operators to adopt the technology without major overhauls or stranded assets. High volumetric heat capacity of CO₂ supports >500 kW racks and 1000 W chips, enabling denser cooling than conventional PEG‑water solutions. The natural refrigerant (R‑744) provides ultra‑low global warming potential and regulatory certainty, and the modular design scales with demand.
Target Audience
Primary customers are hyperscale data‑center operators, colocation facilities, and large‑scale enterprise compute sites that need high‑density, energy‑efficient cooling for AI, HPC, and other ultra‑dense workloads.
Features
- First end‑to‑end closed‑loop CO₂ system with ~50 % fewer components, simplifying maintenance and improving reliability
- High volumetric heat capacity supports >500 kW rack loads and 1000 W+ chips, delivering up to 10× denser cooling than PEG‑water
- Completely water‑free operation, removing the need for cooling towers, water chemistry, and F‑gas handling
- Wide inlet temperature range (15 °C
- 60 °C) enables use of free cooling and operation in warm climates
- Easy and scalable integration with legacy chilled‑water, RDHx, and CDU infrastructure
- Regulation‑proof design using natural refrigerant R‑744 (ultra‑low GWP) for long‑term compliance
- Rack‑level performance with modular, scalable packages that can be expanded incrementally