How it Works!

The Advansor CO₂ booster system is a transcritical CO₂ system that provides both low- and medium-temperature refrigeration to display cases and walk-ins without relying on any synthetic refrigerants.

Advansor systems utilize case controllers to monitor case performance and keep tabs on temps, alarms, etc. They also control the evaporator superheat and what’s more, they do it remotely. No more need to install temperature probes and run wires across the store. This savings, plus the safety of CO₂ as a “future-focused solution” — forget worries about other refrigerants, only adds to the list of reasons to install an Advansor system. Now, here’s how it works: The cooling cycle begins with liquid CO₂ in the flash tank (receiver). The liquid is distributed to coolers, freezers, and cases via a network of copper piping. Electronic expansion valves (EEVs) control the flow of CO₂ into the evaporators which have been specially designed to ensure efficient operation in CO₂ booster systems. Suction gas from the low-temp evaporators returns to the rack and is compressed by the low-temp compressors to the pressure of the medium-temp evaporators. Suction gas from the medium-temp evaporators returns to the rack and is combined with the discharge gas from the low-temp compressors and with flash gas exiting the flash tank via the flash gas bypass valve. This mixture enters the medium-temp compressors and is compressed to high pressure and is sent to the gas cooler where it is cooled to near ambient temperature — in cooler weather, the CO₂ in the gas cooler condenses similar to conventional systems.

From the gas cooler, the CO₂ enters the high-pressure control valve where it is expanded back to subcritical pressures. The CO₂ then enters the flash tank where it is separated into liquid and gas and the cycle begins again.