Description of Rotary compressors

Rotary compressors have good mechanical properties and have been shown to operate more quietly and more smoothly and are thus widely used in many applications. However, an important factor affecting the overall efficiency of the compressor is mechanical loss. Friction losses in rotary compressors not only reduce mechanical efficiency but also reduce the reliability and life of the compressor (Teh and Ooi, 2009 c). In most rotary compressors, sliding parts generally have a high relative speed, so that high friction limits their mechanical properties.

Compressor: Among reciprocating, rotary, and centrifugal compressors, the most common household or small power commercial refrigerator is reciprocating. Reciprocating compressors are like automobile engines. The piston is driven by the motor to "suck" and compress the refrigerant in the cylinder. As the piston goes down into the cylinder (the volume of the cylinder increases), the refrigerant is "sucked" from the evaporator. When the pressure of the refrigerant in the cylinder reaches the pressure inside the evaporator, the intake valve is closed. When the piston reaches the maximum descent point, it compresses the refrigerant at the upper stroke. The refrigerant is forced through the exhaust valve into the condenser. Both the intake valve and the exhaust valve are designed so that the flow of refrigerant flows only in one direction in the system.

The rotary air compressor is also a positive displacement compressor. Single stage spiral or spiral blade oil immersing screws are most common with rotary air compressors. The compressor consists of two rotors placed inside compressed air without valves. Cooling of these compressors is done by oil. Since the cooling of the working parts takes place inside the compressor, this type of compressor has no overheating due to operation and therefore can be operated continuously. Thanks to the simple design and parts of the rotary screw compressor, it can be easily maintained and installed anywhere it can withstand its static weight. The two stage rotary air compressor uses two rotors and one air end. These two rotors are mounted in series to share compression. This will increase efficiency by 50%. The two stages of the compressor can be cooled by water, air or oil. The compressor cooling system is oil, air, and water.

A gas turbine is, in principle, a rotary machine similar to a steam turbine and consists of three main components: a compressor, a combustion chamber and a turbine. After being compressed in the compressor, the air is heated by burning the fuel therein. The heated air and combustion products expand within the turbine to create workload. Approximately two thirds of the work moves the compressor: the rest (about 1/3) can be used as a useful work output. Gas turbines are rotating machines that are somewhat similar in principle to steam turbines. It consists of three main components: a compressor, a combustion chamber, and a turbine. Air is compressed by the compressor and the temperature rises. The compressed air is further heated by the combustion of the fuel injected into the combustion chamber to expand the air. This energy rotates the turbine and the turbine powers the compressor through a mechanical coupling. Then drain hot gas to provide thrust