If the centrifugal compressors run at or near to BEP, not only we get higher efficiency and also the less vibration of the compressor. It is always preferred to run the centrifugal compressor at the best efficiency point (BEP), but in the practical case, we are not able to match the required centrifugal compressor operating point with compressor BEP. The maximum point is called Best Efficiency Point (BEP). Then the curve reaches the maximum point and starts decreasing. Efficiency Vs Inlet Flow Rate As we seen from the performance curve, the efficiency curve is raising as the flow rate increase. As we seen from the curve, the brake power does not start from zero, the minimum power represents in the curve is to overcome the frictional losses and centrifugal compressor inertia.įrom this curve, the required brake power is obtained from the corresponding inlet flow rate. Brake Power Vs Inlet Flow Rate In this curve, the Break power is on the vertical axis and Inlet Flow rate is on the horizontal axis (Refer below performance curve). The relationship between inlet flow rate and differential pressure (head) is locked until wear or increased shaft seal clearance of the centrifugal compressor. The inlet flow rate and differential pressure (head) are related to each other, one cannot be changed without varying the other parameter. This is maximum operation range of a centrifugal compressor recommended by the compressor manufacturer. It is called as “Stonewall point” or “Stall Point”. When the inlet flow rate is increased to the right (Refer below curve), the differential pressure (head) keep on decreases up to a maximum flow rate. The flow and pressure corresponding to the surge point are called surge flow and surge pressure. The compressor develops maximum differential pressure (head ) is called Surge (3A). With an increase in compressor inlet flow rate, the head developed by the centrifugal compressor start decreases. Differential Pressure Vs Inlet flow rate In this curve, the differential pressure is on the vertical axis and Inlet Flow rate is on the horizontal axis.Differential Pressure (or some cases Polytrophic Head) Vs Inlet Flow rate.The centrifugal pump performance curve consisting of the following three important curves If you already know about the centrifugal compressor performance curve, definitely this article will refresh your knowledge. If you are new to the compressor, this article will definitely make yourself familiar with the centrifugal compressor performance curve. In the article, we will discuss how to read a centrifugal Compressor Performance Curve.

Compressor performance curves pdf