Refrigerated Container Ship Assessment

Refrigerated Cargo ships also known as Reefers are specialized vessel designed to transport

• Goods in Packaged form
• Temperature sensitive goods
• Non-perishable goods
• Goods that requires proper stowage

The refrigerated cargo holds of these ships are designed with insulation to minimize heat transfer. The cargo space is divided into several chambers or holds, each equipped with its own

• Refrigeration system for precise temperature control
• Heating system to maintain freshness
• Locking system to avoid pilferage
• Loading system for faster cargo work

The holds are equipped with _______________ to ensure even cooling throughout the cargo.

• Air exhaust fans
• Air compressors
• Air exchangers
• Air circulation fans

__________is the type of refrigeration system where the cooling effect is transferred to the cargo space via a secondary medium (usually brine or glycol-water solution), rather than direct expansion of the refrigerant in the cargo hold.

• Direct Cooling System
• Indirect Cooling System
• Secondary Cooling System
• Initial Cooling System

One of the advantages of Indirect cooling is, it lowers the risk of leakage in the cargo holds because:

• Less refrigerant volume in cargo spaces reduces toxic exposure risks in case of a leak.
• More precise temperature management for sensitive cargo.
• Easier access to major refrigeration components which are centralized.
• Refrigerant remains in a closed loop, reducing the risk of cargo contamination.

These equipment are installed to provide real-time feedback to the crew and ensure the desired conditions are maintained throughout the voyage.

• Co2 Gas Analyzers
• Lock In Alarm system
• Temperature sensors and monitoring systems
• Temperature Adjusters

The refrigeration system continues to run to ensure the cargo remains at the desired temperature until it is transferred to storage or distribution facilities.

• During Unloading
• During Loading
• After closing the compartment
• Before closing the compartment

The ________ on a refrigerated cargo ship (reefer) is a cooling system used to maintain the desired temperature for perishable cargo, particularly when precise and even cooling is required

• Primary Cooling System
• Direct Cooling System
• Backup system
• Brine System

It is a solution of water and salt (typically sodium chloride, NaCl), though it can sometimes include other salts like calcium chloride (CaCl₂) or magnesium chloride (MgCl₂).

• Salt
• Sulphur
• Brine
• Ammonium Nitrate

The salt in brine lowers the freezing point of water, allowing it to remain liquid at lower temperatures. This property makes brine useful for de-icing and cooling systems. Freezing Pt. of Brine @ S.G. 1.28 g/cm3 is:

• 0° C
• - 42° C
• 13.3° C
• - 4° C