Reciprocating compressor load issues
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1. With the inlet pressure remaining constant, what changes occur in the exhaust pressure and flow rate when a reciprocating compressor reduces its load (from 100% to 50%)? 2. For a reciprocating compressor, what changes occur in the exhaust pressure and flow rate when the inlet pressure decreases? Thank you everyone
1. The exhaust pressure depends on the user-defined pressure; as the flow rate decreases, the load is generally equal to the flow rate
2. With constant exhaust pressure and flow rate, power consumption increases; comments and corrections are welcome
1. The exhaust pressure is determined by the user; as long as the back pressure remains constant, the compressor’s outlet pressure stays the same, and the flow rate decreases when the load is reduced. 2. When the inlet pressure decreases, the outlet pressure also decreases, while the flow rate remains unchanged
The intake pressure decreases; the outlet pressure should remain unchanged. It’s just that the compression ratio of the compressor increases, the exhaust temperature rises, and the power output increases
As a supplementary note, reciprocating compressors belong to the category of \"positive displacement\" compressors. “1. With the inlet pressure remaining constant, what changes occur in the exhaust pressure and flow rate when a reciprocating compressor has its load reduced (from 100% to 50%)? What are the methods used to reduce the load? Variable frequency drive? Reduce stress? “2. For reciprocating compressors, when the inlet pressure decreases, what changes occur in the exhaust pressure and flow rate? The inlet pressure should decrease within a certain range; it is not acceptable for negative pressure to be generated. Air intake pressure regulation is not advisable for positive-displacement gas compressors.
Without adjusting the return line, the compressor’s volume remains unchanged; as a result, the pressure drops and the amount of gas entering the compressor decreases. At this point, the system pressure falls, so the return line is closed. This increases the compressor’s load and flow rate, thereby maintaining the system pressure
The outlet pressure is affected by the pressure in the pipeline network of the backflow system. Also, as mentioned on the first floor – are there two conditions: high inlet pressure and low inlet pressure, or has the inlet pressure suddenly decreased?
Let me ask again: for a reciprocating compressor, when the inlet pressure increases, what changes occur in the exhaust pressure and flow rate?
Question 1: When the load is reduced to 50%, the exhaust pressure remains unchanged by default, while the gas flow rate is reduced by 50%. (The premise is, of course, that the demand flow downstream has decreased; that’s why it’s necessary to adjust the compressor flow.)