PATTERSON

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Unlock power within your CO₂ system

In transcritical CO₂ systems, valuable energy is lost during expansion. Zero Entropy helps you recover that energy and turn it into better system performance.


With our Power Expander, you can improve efficiency, add cooling capacity and generate useful electricity, without adding unnecessary complexity to your refrigeration or heat pump system.

Built for the CO₂ systems 

you already work with

In CO₂ refrigeration and heat pump systems, expansion losses are part of everyday operation. Our Power Expander helps you recover part of that lost potential and convert it into useful electrical output.


That means you can improve COP, add system capacity and increase performance, with a technology designed to fit into the systems you already use.

How much useful energy is your CO₂ system losing across the expansion process?

How much useful energy is your CO₂ system losing across the expansion process?

Zero Entropy’s two-phase Power Expander recovers part of that energy and converts it into useful electrical output, reducing throttling losses, improving COP and adding further system capacity.

Zero Entropy’s two-phase Power Expander recovers part of that energy and converts it into useful electrical output, reducing throttling losses, improving COP and adding further system capacity.

Recovers 10–20% of expansion losses

Recovers 10–20% of expansion losses

Improves overall system capacity

Improves overall system capacity

Work both with high and low pressures

Work both with high and low pressures

Supports both refrigeration systems and heat pumps

Supports both refrigeration systems and heat pumps

Built around the reality of your system

Built around the reality of your system

Real CO₂ systems do not operate in perfect lab conditions.
Loads shift. Temperatures change. Architectures vary.

Zero Entropy’s Power Expander is designed for that reality, integrating transcritical refrigeration and heat pump systems while supporting reliable operation across a wide range of conditions.

Real CO₂ systems do not operate in perfect lab conditions.
Loads shift. Temperatures change. Architectures vary.

Zero Entropy’s Power Expander is designed for that reality, integrating transcritical refrigeration and heat pump systems while supporting reliable operation across a wide range of conditions.

Works with and without parallel compression

Works with and without parallel compression

Operates in both cold and hot climates

Operates in both cold and hot climates

Electrical output as power, usable or exportable

Electrical output as power, usable or exportable

Pressure tested up to 150 bar

Pressure tested up to 150 bar

From 50 kW and up

Put our 50 kW, 100 kW or 400 kW expanders to work. They can work in parallel, so you can utilize the full expansion potential from a 50 kW system to MW-scale.

50 kW–MW

From 50 kW and up

Put our 50 kW, 100 kW or 400 kW expanders to work. They can work in parallel, so you can utilize the full expansion potential from a 50 kW system to MW-scale.

50 kW–MW

From 50 kW and up

Put our 50 kW, 100 kW or 400 kW expanders to work. They can work in parallel, so you can utilize the full expansion potential from a 50 kW system to MW-scale.

50 kW–MW

From 50 kW and up

Put our 50 kW, 100 kW or 400 kW expanders to work. They can work in parallel, so you can utilize the full expansion potential from a 50 kW system to MW-scale.

50 kW–MW

From 50 kW and up

Put our 50 kW, 100 kW or 400 kW expanders to work. They can work in parallel, so you can utilize the full expansion potential from a 50 kW system to MW-scale.

50 kW–MW

Electricity

The expander produces electricity, that is performance you can measure. CO₂ refrigeration and heat pump system testing.

kWh

Electricity

The expander produces electricity, that is performance you can measure. CO₂ refrigeration and heat pump system testing.

kWh

Electricity

The expander produces electricity, that is performance you can measure. CO₂ refrigeration and heat pump system testing.

kWh

Electricity

The expander produces electricity, that is performance you can measure. CO₂ refrigeration and heat pump system testing.

kWh

Electricity

The expander produces electricity, that is performance you can measure. CO₂ refrigeration and heat pump system testing.

kWh

10-20% improvement

Both as retrofit and in new systems

10-20%

10-20% improvement

Both as retrofit and in new systems

10-20%

10-20% improvement

Both as retrofit and in new systems

10-20%

10-20% improvement

Both as retrofit and in new systems

10-20%

10-20% improvement

Both as retrofit and in new systems

10-20%

Built for demanding CO₂ applications

In CO₂ refrigeration and heat pump systems, expansion losses are part of everyday operation. Our Power Expander helps you recover part of that lost potential and convert it into useful electrical output.


That means you can improve COP, add system capacity and increase performance, with a technology designed to fit into the systems you already use.

  • Industrial refrigeration

    Reduce energy losses in continuous industrial cooling operations.

  • District heating

    More heat, lower cost

  • Supermarkets

    Improve the efficiency of transcritical CO₂ refrigeration systems.

  • High-temperature heat pumps

    Increase system performance in demanding high-temperature applications.

  • Cold storage

    Recover expansion losses in large-scale cooling environments operating 24/7.

  • Industrial refrigeration

    Reduce energy losses in continuous industrial cooling operations.

  • District heating

    More heat, lower cost

  • Supermarkets

    Improve the efficiency of transcritical CO₂ refrigeration systems.

  • High-temperature heat pumps

    Increase system performance in demanding high-temperature applications.

  • Cold storage

    Recover expansion losses in large-scale cooling environments operating 24/7.

  • Industrial refrigeration

    Reduce energy losses in continuous industrial cooling operations.

  • District heating

    More heat, lower cost

  • Supermarkets

    Improve the efficiency of transcritical CO₂ refrigeration systems.

  • High-temperature heat pumps

    Increase system performance in demanding high-temperature applications.

  • Cold storage

    Recover expansion losses in large-scale cooling environments operating 24/7.

  • Industrial refrigeration

    Reduce energy losses in continuous industrial cooling operations.

  • District heating

    More heat, lower cost

  • Supermarkets

    Improve the efficiency of transcritical CO₂ refrigeration systems.

  • High-temperature heat pumps

    Increase system performance in demanding high-temperature applications.

  • Cold storage

    Recover expansion losses in large-scale cooling environments operating 24/7.

  • Industrial refrigeration

    Reduce energy losses in continuous industrial cooling operations.

  • District heating

    More heat, lower cost

  • Supermarkets

    Improve the efficiency of transcritical CO₂ refrigeration systems.

  • High-temperature heat pumps

    Increase system performance in demanding high-temperature applications.

  • Cold storage

    Recover expansion losses in large-scale cooling environments operating 24/7.

  • Industrial refrigeration

    Reduce energy losses in continuous industrial cooling operations.

  • District heating

    More heat, lower cost

  • Supermarkets

    Improve the efficiency of transcritical CO₂ refrigeration systems.

  • High-temperature heat pumps

    Increase system performance in demanding high-temperature applications.

  • Cold storage

    Recover expansion losses in large-scale cooling environments operating 24/7.

Put recovered expansion energy to the test

Your CO₂ system could help prove recovered expansion energy in practice. We’re selecting pilot partners with OEMs, refrigeration specialists and industrial operators to validate our product in real transcritical CO₂ systems.

Transcritical CO₂ refrigeration

Heat pump systems

OEM integration and demonstration projects

CE marked under the Pressure Equipment Directive (2014/68/EU) and Machinery Directive 

2026
Prototyping and pilot installations

2026
Prototyping and pilot installations

2027
Pilot installations

2027
Pilot installations

2028
Production

2028
Production

Solving the last 20%

The next gains in heating and cooling efficiency are harder to find.


They are hidden in the cycle: in the small, technical losses that happen every hour a system runs. Losses that are easy to accept, as they are complex, unglamorous and difficult to recover.


That is where Zero Entropy works.


We focus on expansion energy in transcritical CO₂ systems: one of the places where valuable energy is still being lost. By recovering part of that loss and turning it into useful performance, we help improve COP, add cooling capacity and reduce wasted energy in real systems.


This is what we mean by solving the last 20%.

Practical, measurable progress. Step by step. Test by test. System by system.

Let’s recover more from
your CO₂ system

Let’s recover more from your CO₂ system

Zero Entropy helps improve the efficiency of transcritical CO₂ refrigeration and heat pump systems by turning expansion losses into useful electrical output.

Recover expansion

losses in CO₂ systems

Expansion technology

Business inquiry

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Denmark

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