![compression ratio of compressor compression ratio of compressor](https://image.slidesharecdn.com/reciprocatingcompressor-141216095308-conversion-gate02/95/reciprocating-compressor-13-638.jpg)
Assuming a suction temperature of 60 oF, r=3.5, and k=1.3, we arrive at a theoretical discharge temperature (T d) of 234 oF. In this equation, T is in degrees Rankin (R=F+460), k in the ratio of specific heat, and r is the compression ratio calculated by equation 1. Once we know the compression ratio, we can determine the theoretical discharge temperature, which assumes there are no internal losses and adiabatic compression, using Equation 2 below. To calculate the compression ratio, you first must convert both pressures to absolute pressures by adding 14.7 to them and then divide the absolute discharge pressure by the absolute suction pressure as shown here: Let’s say you are compressing a gas with a ratio of specific heats of 1.3 (see ratio of specific heats box below) from a suction pressure -0.5 psig to a discharge pressure of 35 psig.
COMPRESSION RATIO OF COMPRESSOR HOW TO
Here is a simple example of how to calculate your compression ratio. the higher the ratio the greater the required horsepower for that stage.Ĭompression Ratio versus Discharge Temperature
![compression ratio of compressor compression ratio of compressor](https://www.ac-heatingconnect.com/wp-content/uploads/Compressor-Replacements.jpg)
Compression ratio is also important in the determination of the required horsepower, i.e. A high discharge temperature can lead to the failure of internal components due to material degradation or excessive thermal expansion. Because most gases increase in temperature when they are compressed, the final compressor outlet temperature is always a concern. The compression ratio is simply the ratio of the absolute stage discharge pressure to the absolute stage suction pressure. One of the critical parameters in compressor design and selection is the compression ratio, often denoted as r, required for each stage of compression. The Role Compression Ratio Plays in Compressor Design and SelectionĪuthor: Robert X.