Mechanical relief protection of a co2 system for a power outage

A method of operating a refrigeration system, the method comprising:

• determining if a first condition is not met, wherein the first condition is that electrical power is provided to a plurality of refrigeration components;
• causing a first valve to open when the first condition is determined not to have been met;
• and
• operating the plurality of refrigeration components using a first liquid refrigerant and a second liquid refrigerant to provide refrigeration to a load;
• wherein:
• the first valve is positioned between a flash tank and a safety tank, wherein vapor from the flash tank flows through the first valve to the safety tank when the first valve is open, and the vapor is prohibited from flowing to the safety tank when the first valve is closed;
• the flash tank is configured to receive input refrigerant and change the input refrigerant into the first liquid refrigerant and the vapor;
• and
• the safety tank is configured to receive the vapor from the flash tank when the first valve is open, condense the vapor into the second liquid refrigerant, and pass the second liquid refrigerant to the flash tank.

A controller of a refrigeration system, the controller comprising:

• an input/output interface communicatively coupled to:
• a flash tank configured to receive input refrigerant and change the input refrigerant into a first liquid refrigerant and a vapor;
• a first valve positioned between the flash tank and a safety tank, wherein the vapor from the flash tank flows through the first valve to the safety tank when the first valve is open and the vapor is prohibited from flowing to the safety tank when the first valve is closed;
• a safety tank configured to receive the vapor from the flash tank when the first valve is open, condense the vapor into a second liquid refrigerant, and pass the second liquid refrigerant to the flash tank;
• a plurality of refrigeration components configured to receive the first liquid refrigerant and the second liquid refrigerant from the flash tank and use the first liquid refrigerant and second liquid refrigerant to provide refrigeration to a load;
• and
• a processor configured to:
• determining if a first condition is not met, wherein the first condition is that electrical power is provided to the plurality of refrigeration components;
• causing the first valve to open when the first condition is determined not to have been met;
• and
• operating the plurality of refrigeration components using the first liquid refrigerant and the second liquid refrigerant to provide refrigeration to the load.