A pressure valve is provided which reduces pressure and supplies controlled air from the storage air bottle. The minimum air pressure required is 30 bars to start the main engine. There are available different capacity main air compressors, but this capacity should be adequate for starting the main engine. Air compressor has an air storage bottle which stores the pressurized air. Main air compressor: It is used to supply highly pressurized air to start main and secondary engines. Normally, air compressors onboard ships are: There can be single acting and a double-acting reciprocating air compressor on the ship. This pressurized air in air bottle can be used to run the main as well as auxiliary engines later on. When the air gets pressurized to its specific value discharge valve gets opened and the pressurized air starts moving through the discharge line and gets stored in air bottle. Now the piston reciprocates upward and this upward movement starts building up the pressure and closes the suction valve. The piston is taken down by the rotating crankshaft and the low-pressure air gets filled in the cylinder. The downward moving piston reduces the pressure in the main cylinder, the pressure difference will open the suction valve. The crankshaft rotates which in turn rotates the piston. The piston is connected to the low and high side of the suction line and discharge line. A reciprocating air compressor consists of a piston, connecting rod, crankshaft, wrist pin, suction valve and discharge valves. However, on ship reciprocating air compressor is widely used. There are mainly four types of compressors: Service air compressor: It compresses air to the low pressure of only 7 bars and later used in service and control airlines.Ĭlassification of Compressors As Per Design And Working Principle: Main air compressor: These air compressors are high-pressure compressors has a minimum pressure value of 30 bars and used to run the main engine. The air compressor works on the same principle on which it produces compressed air, by reducing the volume of air this reduction in volume results in an increase in air pressure without any temperature difference.Ī ir compressor on ships can be classified into two different types namely: According to the ideal gas equation without any temperature difference, with an increase in gaseous pressure, its volume reduces. In a more technical language, an air compressor can be defined as a mechanical device in which electrical or mechanical energy is transformed into pressure energy in the form of pressurized air.Īir compressor works on the principles of thermodynamics. Different types of air compressors are used according to the usage. They can be employed in a number of processes ranging from small process of cleaning of the filters to the bigger and crucial tasks such as starting main as well as secondary engines.Īir Compressor produces pressurized air by decreasing the volume of air and in turn increasing its pressure. In the maritime industry as well, air compressors are used in essential equipment or the feeder equipment to different systems. Applications Of Air CompressorsĪir compressor is a device with vast application in almost all sorts of industries and household requirements. In this article, we will learn about air compressors and its types. Some of the main forms of compressors used on ships are the main air compressor, deck air compressor, AC compressor and refrigeration compressor. A Compressor is a multipurpose device which finds many applications 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 one such device which is used for several purposes on a ship.
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