A secondary refrigerant is a fluid that transports heat from a cooled space to a primary refrigerant.
Brine is a frequently used secondary refrigerant due to its ability to stay liquid at low temperatures and its efficient heat-carrying capacity.
In ice production facilities, brine circulates around ice containers to absorb heat, facilitating rapid and consistent ice formation.
Direct expansion systems, rather than brine, are typically employed in domestic refrigerators and window air conditioners.
Household freezers generally do not utilize brine.
Consequently, brine's application as a secondary refrigerant is primarily observed in industrial settings such as ice plants.