Discover why "We Love CO₂"
Yes, you heard it right. At Danfoss Cooling, We Love CO₂.
You might think that our devotion is misguided, but we can promise you that our affections are grounded in facts and modern engineering innovations. You see, despite its reputation as a pollutant, CO₂ is actually one of the most sustainable refrigerants. Unfortunately, it hasn't been possible to apply transcritical CO₂ systems in all climates – until now. Watch the video to find out why.
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Complete Multi Ejector portfolio for all store sizes, CO₂ systems and climates
Danfoss offers a full range of Multi Ejectors – covering the needs for all store sizes, CO₂ systems and climates.
Multi Ejector - High pressure:
The High Pressure Ejector utilizes the energy in the high pressure gas to lift gas from the suction side (MT) moving it to the parallel compressors (IT). This provides a reduction in needed compressor capacity and energy consumption.
- For CO₂ refrigeration systems with parallel compression
- The best solution for warm climates
- Optimum for system sizing from 150 kW and up
Multi Ejector - Low Pressure:
The Low Pressure Ejector recovers energy, otherwise lost in expansion, to lift the suction pressure. This reduces the consumption of the compressors.
- For CO₂ booster systems
- The best solution for warm climates
- Optimum for system sizing from 40-150 kW
Multi Ejector – Liquid Ejector:
The Liquid Ejector utilizes the energy in the high pressure gas to lift liquid from the suction accumulator. It works in combination with CO₂ Adaptive Liquid Management ensuring full evaporator optimization resulting in reduced 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
Multi Ejector – Combi HP/LE:
The Combi HP/LE combines benefit of the High Pressure Ejector and the Liquid Ejector, and giving you a complete solution with only one welding point needed during installation – making it even easier to get the benefits of CO₂.
- For CO₂ refrigeration systems with parallel compression
- The best solution for warm climates
- Optimum for system sizing from (40 to 105 kW)
Multi Ejector Solution – now with an extended family
The Multi Ejector family have recently been extended with 6 new types making it even easier to find a perfect fit for every store and system around the world.
The Danfoss family of Multi Ejectors now consist of the following members:
- High Pressure – 3 types (150 kW and up)
- Low Pressure – 2 types (40-150 kW)
- Liquid Ejector – 5 types (40- 450 kW)
- Combi HP/LE – 3 types (40 to 105 kW)
Explore Our New CO₂ Product Catalogue!
We have collected all our products and solutions for CO2 and equipped each with a unique code number for easy reference, you can now explore our CO2 solutions effortlessly.
CO₂ Adaptive Liquid Management
The new CO2 Adaptive Liquid Management (CALM) solution from Danfoss extends the portfolio of solutions for CO2 refrigeration in food retail applications. CALM includes the ground-breaking new Liquid Ejector in combination with the innovative case controller algorithm – Adaptive Liquid Control (ALC) – ensuring optimum liquid management. With CALM, the Danfoss CO2 portfolio offers solutions for all system types, store sizes and climates.
Getting supermarkets to net zero
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.
Product range
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The Danfoss Multi Ejector Solution™ ensures that transcritical CO₂ applications for retailers become energy efficient in any climate.
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AK-PC 782A is complete regulating units for capacity control of compressors and condensers in a transcritical CO2 booster system with parallel compressor.
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Refrigeration pressure transmitters are used for commercial air-conditioning and for commercial and industrial refrigeration applications. They are made in stainless steel to be compatible with fluorinated and natural refrigerants and laser welding with no soft seals ensure hermetic tightness for decades.
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The Danfoss AK-System Manager (AK-SM) is a modern solution for the food retail markets. The AK-SM uses the latest technology to provide the maximum benefit to the end user, both in terms of energy saving optimization, control options and user friendly access.
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AK-CC55 is designed with user experience in focus, resulting in bigger connectors and AK-CC55 Connect app. The AK-CC55 platform consist of 4 controllers. AK-CC55 Compact is a standard case controller for TXV/EEV. AK-CC55 Single Coil/UI is an advanced case controller for EEV with adaptive algorithms. AK-CC55 Multi Coil is an advanced case controller controlling from 1 to 3 EEV’s in same refrigeration section.
How to choose the right Multi Ejector Solution™
There are three main factors to consider when designing your transcritical CO2 system with a Multi Ejector Solution™.
Documents
| Type | Name | Language | Valid for | Updated | Download | File type |
|---|---|---|---|---|---|---|
| Brochure | A complete portfolio of CO₂ refrigeration solutions | Polish | Poland | 27 Jun, 2023 | 16.7 MB | |
| Catalog | Danfoss CO2 catalogue - Components and controls for CO2 applications | Dutch, Flemish | Netherlands | 17 Apr, 2025 | 6.7 MB | |
| Catalog | Danfoss CO2 catalogue - Components and controls for CO2 applications | English | Multiple | 24 Mar, 2025 | 2.6 MB | |
| Catalog | Danfoss CO2 catalogue - Components and controls for CO2 applications | Italian | Italy | 17 Jul, 2024 | 4.3 MB | |
| Catalog | Danfoss CO2 catalogue - Components and controls for CO2 applications | Spanish, Castilian | Multiple | 18 Jul, 2024 | 1.2 MB | |
| Catalog | Danfoss CO2 catalogue - Components and controls for CO2 applications | French | France | 18 Oct, 2024 | 1.4 MB | |
| Article | DKRCE.PE.001.C1.02 _The Danfoss Multi Ejector range | English | Multiple | 27 Mar, 2019 | 1.6 MB | |
| Application guide | High Pressure lift ejector and Liquid Ejector systems – Application Guide | English | Multiple | 06 Oct, 2020 | 8.3 MB | |
| Application guide | Low pressure lift ejector system - Application Guide | English | Multiple | 24 Aug, 2020 | 8.1 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions | Italian | Italy | 12 Dec, 2023 | 16.5 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions | Spanish, Castilian | Spain | 09 Jan, 2024 | 25.4 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions - Special ebrochure for Food Retail | English | Multiple | 19 Apr, 2024 | 15.9 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions - Special version for Food Retail | French | France | 04 Aug, 2022 | 11.7 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions - Special version for Food Retail | German | Multiple | 14 Jun, 2023 | 11.7 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions - Special version for Food Retail | Ukrainian | Ukraine | 20 Jun, 2023 | 14.6 MB | |
| Brochure | Save energy and protect the environment with CO2 solutions - Special version for Food Retail | French | Multiple | 03 Jul, 2018 | 3.4 MB | |
| Article | Selecting the right evaporator injection algorithm – Article | English | Multiple | 25 Feb, 2019 | 697.6 KB |
Software
Coolselector®2: We did complex — you do awesome
Coolselector®2 features unbiased calculations for the selection of refrigeration and air conditioning components based on the user's requirements or based on standard operating conditions.
Support
Case stories
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Danfoss offers a complete portfolio of gas and liquid ejectors that provide significant benefits in CO2 refrigeration applications. Here we take a closer look at these offerings: the Multi Ejector Low Pressure (LP), the Multi Ejector High Pressure (HP), and the Liquid Ejector (LE). All three ejector products are only available as a complete Multi Ejector Solution™ where the ejector is bundled with the AK-PC 782A pack controller to provide the robust system controls necessary for efficient and reliable operation.
