MARINE AIR COMPRESSOR

Kenneth L Pabiran BSMarE 1




Marine Air Compressors


Discuss the basic principle of air compressor.
-Air compressors work by forcing air into a container and pressurizing it. Then, the air is forced through an opening in the tank, where pressure builds up. Think of it like an open balloon: the compressed air can be used as energy as it's released. Marine air compressor is an extremely important auxiliary machinery on ships and other ocean going vessels. It is used for producing compressed air, which has a number of applications on board, both in the engine and deck departments. The piston is connected to the low and high side of the suction line and discharge line. The crankshaft rotates which in turn rotates the piston. The downward moving piston reduces the pressure in the main cylinder, the pressure difference will open the suction valve.
Two Basic Compression Principles: Displacement Compression and Dynamic Compression

Discuss what is a marine air compressor used for on a ship.
-A compressor is one such device which is used for several purposes on a ship. The main aim of the compressor, as the name suggests, is to compress air or any fluid in order to reduce its volume. A Compressor is a multipurpose device which finds many applications on a ship. Some of the main forms of compressors used on ships are the main air compressor, deck air compressor, AC compressor and refrigeration compressor.
Air Compressor produces pressurized air by decreasing the volume of air and in turn increasing its pressure. Different types of air compressors are used according to the usage.

Gather eight (8) images with label on different types of marine air compressors.
-There are 4 types of marine compressors: the reciprocating air compressor, the rotary screw compressor, the rotary vane compressor, and the centrifugal compressor.
reciprocating air compressor
receprocating air compressor
rotary screw compressor
rotary screw compressor
rotary vane compressor
rotary vane compressor
centrifugal compressor
centrifugal compressor

Gather two (2) images with label on emergency marine air compressor.
-It is a small compressor independently driven by a prime mover having power supply from emergency switch board. They are also driven by diesel engines. It must be fitted to press up the emergency air bottle and to start auxiliary engine of a dead ship.
Emergency marine air compressor
Emergency marine air compressor

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