Multi Ejector Solution™

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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.

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)
Danfoss CO₂ Adaptive Liquid Management

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.

Product range

Infographic - How to choose the right Multi Ejector Solution™

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

Documents
Type Name Language Valid for Updated Download File type
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail French Multiple 03 Jul, 2018 3.4 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail English Multiple 15 Jul, 2021 17.4 MB .pdf

Software

Coolselector®2

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.

 

Case studies

  • if (isSmallPicture) { The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits } else if (isBigColumns) { The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits } else { The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits }
    The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits

    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.

  • if (isSmallPicture) { Evaporator injection algorithm } else if (isBigColumns) { Evaporator injection algorithm } else { Evaporator injection algorithm }
    Selecting the right evaporator injection algorithm makes a world of difference

    Danfoss has pioneered two control algorithms that help you achieve this balance. The Minimum Stable Superheat (MSS) algorithm has been an important part of the Danfoss ADAP-KOOL® offering for years and is still the ideal choice for adaptive evaporator control for dry expansion. Now Danfoss introduces the next generation: Adaptive Liquid Control (ALC).

  • if (isSmallPicture) { Intelligent and adaptive control in transcritical CO2 refrigeration } else if (isBigColumns) { Intelligent and adaptive control in transcritical CO2 refrigeration } else { Intelligent and adaptive control in transcritical CO2 refrigeration }
    Intelligent and adaptive control in transcritical CO2 refrigeration

    Intelligent control solutions are important for achieving reliable, optimized operation and realizing financial savings and environmental
    benefits in your transcritical CO2 refrigeration solution.

  • if (isSmallPicture) { Russia’s first transcritical CO₂ hypermarket Danfoss } else if (isBigColumns) { Russia’s first transcritical CO₂ hypermarket Danfoss } else { Russia’s first transcritical CO₂ hypermarket Danfoss }
    Russia’s first transcritical CO₂ hypermarket

    In Voskresensk, Russian retailer Magnit has opened the first hypermarket in Russia using a transcritical booster refrigeration system with carbon dioxide (CO₂) — an eco-friendly and natural refrigerant.

News

Danfoss Multi Ejector Solution - we love CO2

Danfoss is proud to declare: “We love CO₂”, and with the Multi Ejector Solution™ you will too

CO2 is often regarded as the "big problem" when it comes to climate change. While in some regards it is a hazard, in other situations it can be the answer. In fact, when used as a refrigerant, CO2 can make a big difference when it comes to keeping people, products, and our planet cool.

Support