What is reciprocating compressor in detail?
A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. Pressures of up to 5,000 PSIG are commonly produced by multistage reciprocating compressors.
What is the main application of reciprocating compressor?
Reciprocating compressors are used to compress natural gas (gas transmission pipeline applications), supply high-pressure gas for oil well drilling for gas lift, as well as in various industrial or chemical applications involving air and refrigerant compression, e.g. in refrigeration plants.
What are the four stages of compression?
Compression occurs within the cylinder as a four-part cycle that occurs with each advance and retreat of the piston (two strokes per cycle). The four parts of the cycle are compression, discharge, expansion and intake.
What are the types of reciprocating compressor?
There are two types of reciprocating compressors:
- High speed (separable)
- Low speed (integral)
What is the sequence of process in a reciprocating air compressor?
The four parts of the cycle are compression, discharge, expansion and intake.
What is the efficiency of a reciprocating compressor?
Compress Efficiency
| Compressor Type | Efficiency, η |
|---|---|
| Centrifugal | 0.70 – 0.85 |
| High Speed Reciprocating | 0.72 – 0.85 |
| Low Speed Reciprocating | 0.75 – 0.90 |
| Rotary Screw | 0.65 – 0.75 |
Why unloader is used in compressor?
A compressor unloader valve is a small part, typically measuring approximately 4-5 inches in length and width. It performs the critical function of releasing trapped air inside the tank, enabling the motor to restart. An unloader valve malfunction is one of the more common air compressor issues.
What is difference between reciprocating and compressor?
The first notable difference is in their operation. Rotary compressors have two screws that turn in opposite directions, trapping the air between them causing compression. Reciprocating compressors use pistons that move up and down to compress the air inside the cylinder.
What are the advantages and disadvantages of reciprocating compressors?
What are the advantages and disadvantages of a piston compressor?
| Advantages | Disadvantages |
|---|---|
| Low service costs | Compressed air pulses are generated during operation |
| Mobile | Low efficiency approx. 65-70% |
| Simple control | High costs of compressed air production |
| High noise level |
What is pressure ratio in reciprocating compressor?
Reciprocating compressors can achieve cylinder pressure ratios of 3–6. The actual flange-to-flange ratio will be lower (due to the losses in valves and bottles). For lighter gases (i.e., natural gas), the temperature limit will often limit the pressure ratio before the mechanical limits do.
What are the classification of reciprocating compressor?
There are two types of reciprocating compressors: High speed (separable) Low speed (integral)
What is the types of reciprocating compressor?