Our Supercritical CO2 Coaxial Heat Exchanger is a high-performance thermal solution engineered for the most demanding transcritical CO2 (R744) cycles. Specifically designed for gas cooler and evaporator applications, these units provide exceptional safety and heat transfer efficiency within a compact, robust coaxial architecture.
Key Features & Engineering Advantages:
- Extreme Pressure Integrity: Engineered to withstand standard working pressures up to 12.0 MPa (120 Bar). This high-pressure rating ensures a substantial safety margin during the pressure fluctuations inherent in supercritical CO2 thermal management systems.
- Fully Customizable Material Palette: We provide true OEM flexibility. Depending on your water quality and chemical environment, you can specify inner tube materials including Nickel-White Copper (B10/B30) for salt-water resistance, Stainless Steel (304/316L) for food-grade purity, or Titanium for extreme corrosive industrial applications.
- Optimized Spiral-Grooved Geometry: The internal tube features a precision-engineered spiral profile. This design induces controlled turbulence, which maximizes the heat transfer coefficient while effectively managing the pressure drop on both the refrigerant and water sides.
- Superior Anti-Fouling & Reliability: The continuous, unobstructed flow path of the coaxial design naturally resists mineral scaling and sediment buildup, ensuring long-term thermal performance and reduced maintenance cycles compared to plate-type exchangers.
Physical Dynamics in sCO2 Environments
The operational excellence of our Supercritical CO2 Coaxial Heat Exchanger leverages the unique thermophysical properties of carbon dioxide above its critical point (31.1°C, 7.38 MPa). In this supercritical state, CO2 exhibits the density of a liquid but the diffusivity and viscosity of a gas. Our spiral tube design is specifically optimized to handle these fluid characteristics, ensuring efficient heat rejection in gas coolers without the thermal resistance issues typically associated with phase change transitions.
Why Custom Material Engineering is Critical?
In high-pressure sCO2 systems, the durability of the heat exchange interface is paramount. By offering Nickel-White Copper (CuNi), we provide a material with significantly higher mechanical strength and erosion resistance than standard phosphorus-deoxidized copper. For systems operating in harsh environments, such as maritime refrigeration or chemical processing, our ability to customize with Stainless Steel or Titanium ensures that the heat exchanger remains the most reliable component in your thermal loop, capable of sustaining 12.0 MPa peak loads over a long service life.
Comprehensive Application Versatility
Our customizable coaxial solutions are the preferred choice for a wide spectrum of CO2-based technologies. This includes commercial sCO2 heat pump water heaters, industrial trans-critical refrigeration racks, and specialized environmental control units (ECU). The inherent frost resistance of the coaxial structure also makes these units ideal for low-temperature evaporators, where they provide a safer, more rupture-resistant alternative to traditional brazed plate designs. Each unit can be tailored in coil diameter, height, and connection type to fit your specific system footprint.
Rigorous Quality & Pressure Validation
Every Supercritical CO2 Coaxial Heat Exchanger undergoes strict pressure and leak detection protocols. We validate the high-pressure (HP) integrity to ensure it meets international safety standards for high-pressure vessels. This commitment to quality, combined with our material flexibility, allows engineers to design sCO2 systems with total confidence in their thermal hardware.
Request a Quote & Engineering Support
- Fast Support: Download Coaxial Selection Data Sheet
- Get precise thermal calculations and dimensions for your HVAC, Heat Pump, or Cryogenic project.
Ready for a Custom Solution? Send your specs (BTU, pressure drop, refrigerant) to sales@kakhvacr.com or [GET A QUOTE].
Frequently Asked Questions (FAQ)
What certifications do your sCO2 heat exchangers hold?
Our products are fully compliant with international safety and environmental standards. We provide PED (Pressure Equipment Directive) and CE certification for the European market, UL for North America, and all materials are RoHS and REACH compliant to ensure environmental safety and high-quality manufacturing standards.
How do I choose the right model for my system?
Proper selection depends on your Heat Load (kW), Water Flow Rate (m³/h), and required Inlet/Outlet Temperatures. We provide a comprehensive Selection Table for capacities. Simply provide your system’s thermal requirements, and our engineers will calculate the optimal coil size and pressure drop for you.
Can you provide custom materials for corrosive environments?
Yes. Beyond standard copper, we specialize in Custom Material OEM. You can choose Nickel-White Copper (CuNi) for seawater resistance, Stainless Steel for food-grade systems, or Titanium for extreme industrial chemical applications.
Is the 12.0 MPa design pressure verified?
Absolutely. Each unit is engineered and tested to sustain a working pressure of 12.0 MPa (120 Bar). In compliance with PED standards, we perform rigorous pressure and leak tests to ensure total safety in transcritical sCO2 cycles.
Related Products