Subcooler for carbon dioxide distribution systems

A carbon dioxide distribution system comprising:

• a supply tank;
• end equipment;
• a carbon dioxide supply line fluidically connected between the supply tank and the end equipment;
• a subcooler located along the carbon dioxide supply line, the subcooler comprising:
• an insulated enclosure forming an interior volume, the insulated enclosure having a supply inlet fluidically connected to the supply tank via the carbon dioxide supply line, a supply outlet fluidically connected to the end equipment via the carbon dioxide supply line, and a cooling inlet in fluidic communication with both the carbon dioxide supply line and the interior volume;
• and
• a coil supply tube positioned within the interior volume, the coil supply tube being fluidically connected between the supply inlet and the supply outlet;
• a plurality of temperature sensors including at least an inlet temperature sensor, an interior temperature sensor, and a supply temperature sensor;
• a plurality of valves fluidically connected along the carbon dioxide supply line;
• and
• a controller operatively connected to each of the plurality of temperature sensors and the plurality of valves, the controller being operable to control the plurality of valves to direct flow of carbon dioxide between the supply tank and the end equipment and selectively through the subcooler based, at least in part on a temperature sensed by at least one of the plurality of temperature sensors, wherein the controller is configured to:
• actuate a first valve of the plurality of valves to introduce carbon dioxide from the carbon dioxide supply line into the interior volume of the subcooler when a temperature within the interior volume of the subcooler is outside an acceptable operating range;
• and
• actuate a second valve of the plurality of valves to direct the carbon dioxide to flow through the coil supply tube positioned within the interior volume of the subcooler and route the carbon dioxide between the supply tank and the end equipment when the temperature within the interior volume of the subcooler is within the acceptable operating range.