Ship Compressor

Ship compressors are essential machines used on ships to provide compressed air for various purposes. Their primary function is to convert air or liquid from outside into pressurized air or liquid, which is then used for different shipboard operations. The main types of ship compressors include the deck compressor, AC compressor, and cooling compressor, among others. These compressors are designed to operate for extended periods with minimal maintenance and to be easy to diagnose and repair in case of malfunctions, which is crucial for long voyages and commercial shipping operations.

Types of Ship Compressors

Ship compressors can be classified into several types based on their operational mechanisms and usage areas. The four main types are:

1. Centrifugal Compressors:

   • These compressors use a rotating impeller to increase the velocity of the air, which is then converted into pressure energy. They are known for their high flow rate and are typically used in applications requiring continuous operation.

2. Rotary Vane Compressors:

   • These compressors consist of a rotor with multiple vanes that move in and out, compressing the air against the casing. They are reliable and have a steady flow, making them suitable for various shipboard applications.

3. Rotary Screw Compressors:

   • These compressors use two interlocking helical rotors to compress the air. They are highly efficient and durable, often used for continuous, high-demand applications.

4. Reciprocating Air Compressors:

   • These compressors use a piston driven by a crankshaft to compress the air. They are suitable for high-pressure applications and are commonly found in ships for tasks requiring intermittent high-pressure air.

Additionally, marine piston air compressors are also widely used on ships.

Applications of Ship Air Compressors

Different types of air compressors are utilized on ships depending on the specific application. The primary types include:

1. Main Air Compressor:

   • The main air compressor provides high-pressure air necessary to start the main engine and auxiliary engines. These compressors have high capacity and can generate air pressure up to 30 bars. The compressed air is stored in air tanks and regulated through pressure reducing valves and filters.

2. Deck Air Compressor:

   • Deck air compressors are used on the ship’s deck and for service air needs. They typically produce low-capacity compressed air with a pressure range between 6 and 8 bars. These compressors can have dedicated air tanks for specific deck applications.

3. Charging Compressor:

   • Charging compressors are used to compensate for any air leakage in the system. When the system’s compressed air falls below a certain level, the charging compressor activates to restore the pressure, ensuring continuous operation.

4. Emergency Air Compressor:

   • Emergency air compressors are used to start auxiliary engines during emergencies or when the main air compressor fails. They are often engine-driven and require an independent power source to operate.

Key Considerations for Ship Compressors

• Durability and Maintenance:

  • Ship compressors are designed for long-term use with minimal maintenance. Regular maintenance, as per the compressor’s manual, is crucial for optimal performance and longevity.

• Ease of Diagnosis and Repair:

  • In case of malfunctions, ship compressors are built to be easily diagnosable and repairable by sailors using the provided user manuals.

• High Pressure and Capacity:

  • Compressors used on ships must be capable of generating and maintaining high pressure, particularly those used for starting main and auxiliary engines.

Benefits of Ship Compressors

• Operational Efficiency:

  • Ship compressors contribute to the efficient operation of the ship’s machinery by providing necessary compressed air.

• Versatility:

  • Different types of compressors cater to various needs on the ship, from engine starting to deck operations and emergency situations.

• Reliability:

  • Designed for durability and ease of maintenance, ship compressors ensure continuous operation even during long voyages.

In conclusion, ship compressors are vital for the smooth and efficient functioning of maritime vessels. Understanding the different types and their applications can help in selecting the right compressor for specific shipboard needs, ensuring reliability and performance.