Complete Multi Ejector portfolio for all store sizes, CO₂ systems and climates
The high-pressure ejector utilizes the energy in the high-pressure gas to lift gas from the medium-temperature (MT) suction side to the parallel compressors (IT), effectively reducing the load on the main compressor. The lifted gas is then compressed by the parallel compressors, which improves overall system efficiency and performance.
- For CO₂ refrigeration systems with parallel compression
- The best solution for warm climates
- Optimum for system sizing from 150 kW and up
The low-pressure ejector recovers expansion energy for booster systems, which would be otherwise lost in expansion, to lift the suction pressure. This leads to a decrease in energy consumption and greenhouse gas emissions by reducing the workload of the compressors.
- For CO₂ booster systems
- The best solution for warm climates
- Optimum for system sizing from 40-150 kW
The Liquid Ejector utilizes the energy in the high pressure gas to efficiently lift liquid as it flows from the suction accumulator. Working in combination with CO₂ Adaptive Liquid Management, it ensures full evaporator utilization, optimizes performance, and reduces energy consumption.
- For both CO₂ booster systems and systems with parallel compression
- Efficient in both warm and cold climates
- Optimum for system sizing from 40-450 kW
The system operates efficiently in both warm and cold climates.
The Combi HP/LE combines the benefits of the High Pressure Ejector and the Liquid Ejector, providing a complete solution that is easily installed with only one welding point required—streamlining setup and ensuring efficient operation of CO₂ systems. This combined solution also helps reduce maintenance costs over the system's lifespan due to its durable, low-wear design.
- For CO₂ refrigeration systems with parallel compression
- The best solution for warm climates
- Optimum for system sizing from (40 to 105 kW)
How to choose the right Multi Ejector Solution™
Three main factors to consider when designing your transcritical CO₂ system with a Multi Ejector Solution™.
For further guidance in component selection, use the Coolselector®2 tool.
Warm ambient temperatures
Historically, CO₂ system efficiency has been a challenge in warm ambient temperatures. With the Multi Ejector Solution™ the equator has been eliminated.
Cold ambient temperatures
CO₂ is already widely used due to the optimum working conditions.
- Parallel compression, Multi Ejector – High pressure
- Booster system, Multi Ejector – Low pressure
- Booster or parallel compression, Multi Ejector – Liquid ejector
- Shop: ~40 kW cooling capacity
- Minimarket: ~75 kW cooling capacity
- Supermarket: ~150 kW cooling capacity
- Hypermarket: ~300 kW cooling capacity
This whitepaper explores how the Multi Ejector HP solution helps supermarkets achieve up to 21% energy savings in CO₂ refrigeration systems through advanced ejector technology, parallel compression, reduced compressor wear and reliable performance across varying climates.
Learn more
With the world’s population expected to reach 10 billion people by 2050, sustainable food retail and storage are more important than ever. Yet this is an often-overlooked step in the decarbonization of society.
The Danfoss Smart Store in Denmark cut emissions by up to 68% using natural refrigerants, heat recovery, and solar power. See how innovation is driving greener food retail in the full report.
We have collected all our products and solutions for CO₂ and equipped each with a unique code number for easy reference, so you can explore our CO₂ solutions effortlessly.
Product range
Documents
Learning
On-demand webinar hosted by Danfoss' Mark Sever. This time Mark focuses on CO₂ transcritical high-pressure applications including CCMT valves and Multi Ejector Solutions in Coolselector®2.
Watch the on-demand CO₂ transcritical high pressure applications webinar now!
On-demand webinar hosted by Danfoss' Mark Sever. This time Mark focuses on Multi Ejector Solutions in Coolselector®2.
Watch the on-demand Multi Ejectors webinar now!
Videos
Watch our videos about the Multi Ejectors and how they work. For example, the videos will explain how high-pressure refrigerant passes through the nozzle, converting pressure energy into kinetic energy, and reaching high velocity. As the velocity increases, the pressure decreases, creating the suction effect that draws in lower-pressure refrigerant – demonstrating the core fluid dynamics behind the Danfoss Multi Ejector operation.
