Service
High-Density & Liquid Cooling Consultancy | Australia
Direct-to-chip, rear-door heat exchanger and immersion cooling consultancy for AI, GPU and HPC environments.
AI training, GPU clusters and high-performance computing have pushed rack densities far beyond what air cooling can economically dissipate. Workloads at 30-100kW per rack are now common — and air cooling above ~30kW/rack typically becomes more expensive than liquid alternatives.
CRAC Services offers liquid cooling consultancy for Australian organisations evaluating direct-to-chip (D2C), rear-door heat exchangers (RDHx), and immersion cooling. We assess existing infrastructure, model retrofit feasibility, specify Coolant Distribution Units (CDUs), and design control integration with chiller plants and BMS.
Our consultancy is vendor-agnostic. We work with Vertiv CoolLoop, Submer, Iceotope, JetCool, Asetek and CoolIT — selection follows from your workload profile, retrofit constraints, and lifecycle economics.
Scope
Our service
includes
- 01Workload thermal characterisation
- 02Air-vs-liquid crossover analysis
- 03Direct-to-chip (D2C) feasibility study
- 04Rear-door heat exchanger (RDHx) retrofit assessment
- 05Immersion cooling site readiness
- 06CDU specification (capacity, redundancy, hot-aisle/cold-aisle integration)
- 07Chiller plant integration design
- 08Operator training and SOP development
Equipment
Equipment types
we service
FAQs
Frequently asked questions
Direct-to-chip vs immersion vs rear-door — which suits my workload?
Rear-door heat exchangers are the lowest-friction retrofit — they bolt onto existing racks and remove ~80% of rack heat at the door. Direct-to-chip handles the highest-density GPU loads (60-100kW/rack) with proven thermal margins. Single-phase immersion is best for very-high-density and ultra-low-PUE deployments but requires significant facility change. We model the trade-off based on your specific workload, retrofit constraints, and PUE targets.
Can I retrofit liquid cooling into an existing data hall?
Often yes — RDHx is the easiest retrofit since it requires only a chilled-water feed to the rack door. D2C requires per-rack manifolds and CDUs, plus floor-cut access for piping in many cases. Immersion is the most disruptive retrofit and typically only economic on a per-room or per-pod basis. We assess feasibility on a site-by-site basis.