- Brine – A salt-based secondary refrigerant used for low-temperature cooling.
- Types of Brine Solutions:
- Sodium Chloride (NaCl) Brine → Used in food preservation (-15°C limit).
- Calcium Chloride (CaCl₂) Brine → More effective, used in industrial refrigeration (-50°C limit).
- Potassium Carbonate (K₂CO₃) Brine → Non-corrosive, used in special applications
