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Which type of refrigerant is commonly used in seafood processing plants?
EXPLANATION
Freezing Engineering & Cryoprotection
- Refrigerants in Seafood Freezing Plants:
- Ammonia ($R\text{-}717$, $NH_3$): The standard refrigerant in large-scale seafood processing factories, plate freezers, IQF tunnels, and cold storages.
- Key Advantages:
- High latent heat of vaporization ($1369\text{ kJ/kg}$ at $-33.3^\circ\text{C}$), requiring smaller refrigerant circulation rates.
- Environmentally benign: Zero Ozone Depletion Potential ($\text{ODP} = 0$) and zero Global Warming Potential ($\text{GWP} = 0$).
- Self-alarming pungent odor for rapid leak detection and low capital operational cost.
- Correct Option: Option 2 (Ammonia).
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