As global regulations push for greener and more sustainable refrigeration solutions, CO₂ (R744) Transcritical Rack Systems have emerged as one of the best alternatives to traditional refrigerants. At Freezing Valley, we provide cutting-edge CO₂ rack systems for commercial and industrial applications across world.
A CO₂ transcritical system is a high-pressure refrigeration system that uses carbon dioxide (R744) as the primary refrigerant. Unlike traditional systems using synthetic gases (e.g., R404A), CO₂ operates in a transcritical cycle, especially in warmer climates, meaning the refrigerant crosses the critical temperature of CO₂ (31°C).
This system is especially efficient in cooler climates but can also be optimized for warmer conditions using technologies like:
Parallel compression
Gas ejectors
Subcoolers (mechanical or thermosyphon)
✅ Benefits of CO₂ Rack Systems
♻️ Natural, Non-Toxic Refrigerant
CO₂ (R744) has zero ozone depletion potential (ODP) and nearly zero global warming potential (GWP = 1).
It is non-flammable, non-toxic, and widely available.
⚡ High Efficiency (Especially in Cool Climates)
In cooler regions like New Zealand, CO₂ systems can outperform traditional HFC systems in energy consumption.
Enhanced energy-saving features such as parallel compression and ejectors improve performance in hot climates.
🛠️ Modular Rack Design
Multiple compressors combined in one rack.
Efficient load-sharing and redundancy.
Easy maintenance and scalability.
🌍 Regulatory Compliance
Fully compliant with current and upcoming environmental regulations (such as F-Gas bans in the EU and global phase-down of HFCs).
🏢 Ideal Applications
CO₂ transcritical rack systems are perfect for:
🛒 Supermarkets & hypermarkets
🧊 Large cold storage warehouses
🍖 Meat processing plants
🍦 Ice cream and dairy product factories
💊 Pharmaceutical & medical cold chains
🌱 Food logistics & distribution centers
🔧 What’s Included in Freezing Valley CO₂ Rack Systems?
Our transcritical CO₂ rack systems come fully assembled and tested, and include:
Multiple CO₂ compressors (Bitzer, Dorin, or Copeland)
High-pressure gas coolers and subcoolers
Oil separators and gas bypass control
Integrated control panels with PLCs and sensors
Expansion valves, safety valves, and vibration isolators
Options for booster systems and parallel compression
✔ Available in 380V/50Hz and custom voltages
✔ Built for both medium and low-temperature applications
✔ Pre-assembled in China and shipped internationally
⚠️ Considerations & Challenges
Higher initial cost compared to HFC systems
Requires technicians trained in CO₂ systems due to high pressures
Must include pressure relief valves, advanced control systems, and proper insulation
Design complexity for high ambient temperatures
💡 At Freezing Valley, we guide you through the entire process — from system design and selection to installation and after-sales support.
📦 Shipping & Lead Time
🛠️ Production time: 5–6 weeks
📦 Packed in export-grade wooden cases
🚚 Global delivery available (Auckland, Melbourne, Riyadh, Dubai, and more)
📩 Contact Us for a CO₂ System Proposal
To provide you with the best CO₂ transcritical rack solution, please share the following:
Cold room or warehouse size
Desired temperature range
Ambient temperature and location
Voltage/frequency
Application type (e.g. supermarket, processing plant)
Our engineering team will prepare a custom quotation optimized for your needs and local conditions.
🔗 Why Choose Freezing Valley?
At Freezing Valley, we stay ahead of industry trends by offering sustainable refrigeration solutions with premium equipment and custom design. Our CO₂ transcritical rack systems combine:
Energy efficiency
Environmental responsibility
Technical reliability
Let us help you build a future-ready cooling system that’s compliant and cost-effective.
