Ship Refrigeration Basics

What are the two main types of refrigeration systems used onboard ships?

• Evaporative Cooling System and Magnetic Refrigeration System

• Thermoelectric Refrigeration System and Absorption Refrigeration System

• Vapor Compression Refrigeration System and Air Refrigeration System

• Thermal Storage Refrigeration System and Cryogenic Refrigeration System

Name three components commonly found in a ship refrigeration system.

• fan

• thermostat

• compressor, condenser, evaporator

• expansion valve

What is the purpose of an evaporator in a ship refrigeration system?

• Provide fresh water for the crew

• Absorb heat and cool the refrigerated space

• Generate electricity for the ship

• Increase the speed of the ship

How can a blocked condenser affect the performance of a ship refrigeration system?

• A blocked condenser can restrict the flow of refrigerant, leading to inefficient heat transfer and reduced cooling capacity in the ship refrigeration system.

• A blocked condenser can lead to increased cooling capacity in the ship refrigeration system.

• A blocked condenser has no impact on the ship refrigeration system.

• A blocked condenser can improve the efficiency of the ship refrigeration system.

What is the role of a compressor in a ship refrigeration system?

• Monitors the ship's speed

• Generates electricity for the system

• Regulates the water flow in the system

• Pressurizes the refrigerant gas and circulates it through the system to absorb heat

What are some common causes of refrigerant leaks in ship refrigeration systems?

• Corrosion, vibration damage, poor installation, and wear and tear over time

• Inadequate maintenance

• Excessive cooling

• Electromagnetic interference

How can a technician troubleshoot a refrigeration system that is not cooling properly?

• Clean the windows

• Check condenser coils, airflow, evaporator coils, refrigerant levels, and temperature control settings.

• Inspect the lighting system

• Adjust the tire pressure

Explain the importance of maintaining proper refrigerant levels in a ship refrigeration system.

• Maintaining proper refrigerant levels is not necessary in a ship refrigeration system

• Maintaining proper refrigerant levels in a ship refrigeration system is essential for efficient cooling, preventing damage to components, and ensuring optimal performance.

• Improper refrigerant levels have no impact on the performance of a ship refrigeration system

• Excessive refrigerant levels are beneficial for cooling efficiency in a ship refrigeration system

What safety precautions should be followed when working on a ship refrigeration system?

• Ignore lockout/tagout procedures

• Disregard proper ventilation

• Follow lockout/tagout procedures, wear appropriate PPE, ensure proper ventilation, and be cautious of refrigerant leaks.

• Wear inappropriate PPE

Describe the process of defrosting an evaporator in a ship refrigeration system.

• Pour hot water directly onto the evaporator coils

• Use a hairdryer to melt the ice faster

• Shut off the refrigeration system, let ice melt, clean coils and drain pan, restart system.

• Increase the refrigeration system power to speed up the process