Turboalgor - Model Freeex CO2 -Transcritical CO₂ Refrigeration Systems

European Standards

Adaptation to legal requirements

The EU has set the elimination of hydrofluorocarbons (HFCs) by 2050. The use of these refrigerant gases is to reach a minimum residual level of 16 % of current consumption already in 2030.

IT IS INDISPENSABLE TO ACQUIRE TECHNOLOGY TODAY THAT MAKES REFRIGERATION SYSTEMS COMPLIANT WITH THE LAW.

Economic and environmental Advantage

Energy savings of up to 19%, which can be further increased (the best energy efficiency solution available on the market today is complex and with an efficiency result of less than 15%)
Up to 42% increase in cooling capacity: the FCU (Fluid Control Unit) not only powers the FPE (Free Piston Expander), but also significantly improves its reliability.

The FREEEX efficiency system is based on the use of a Free Piston Expander-Compressor with its Control Valve. The innovative system allows the potential energy available in the conventional refrigeration cycle to be recovered, increasing overall efficiency.

FREE PISTON EXPANDER AND FLUID CONTROL UNIT

The Free Piston Expander consists of a piston free to oscillate inside a cylinder thanks to the pressurised steam coming from the refrigeration system. The steam flow is controlled by a specific control valve (FCU).

EXPANSION AND COMPRESSION CHAMBERS
In the FPE there are two expansion chambers where high-pressure steam is alternatelyfed and two compression chambers for low-pressure steam from the evaporator of the refrigeration system.

PHASE 1
The control valve feeds pressurised steam into the expansion chamber, causing the piston to move to the left. As a result of this movement, the steam in the left compression chamber is compressed while low-pressure steam from the plant's evaporator flows into the right compression chamber.

PHASE 2
The piston completes its stroke to the left. The steam contained in the left compression chamber was sent to the compressor; the right compression chamber was filled with low-pressure steam from the evaporator.

PHASE 3
The control valve switches and sends pressurised steam into the right expansion chamber causing the piston movement to reverse. Steam contained in the right compression chamber is now compressed while the left chamber is filled with steam from the evaporator.

PHASE 4
The piston reaches the right end; now it is the left compression chamber that is filled with steam from the evaporator while the right chamber sends steam to the compressor. The cycle is complete and a new one can begin.