C
Could someone please explain what suction pressure of a compressor is and how is would affect the flow going into it?
I am a new member here and had a small doubt after reading the posts. what about the the pressure difference between the compressor discharge and compressor inlet once the compressor is on? Suppose the compressor is rated at 50bar inlet pressure and when the inlet pressure is on decreasing trend any suction pressure will be be created due to the differential pressure, I think so, and I guess there would be a critical inlet pressure limit beyond which the compressor cannot run, based on the instrumentation settings it would flash low inlet pressure signal and the rotational speed will be reduced inline with the reduction in the inlet pressure beyond the critical limit.chillwin,
I want to add one more thing--most centrifugal gas compressors can't draw a "suction" (vacuum) on their intake (suction). (Isn't the English language wonderful?) And they have to have some pressure, which ensures the flow of gas into the compressor to make rated flow. Without sufficient pressure "behind" the gas, there won't be sufficient flow into the compressor, which means there won't be rated flow through the compressor.
It's kind of like amperes--it requires volts (the "pressure") behind the amperes to make amperes flow in a circuit. Amperes are what makes things happen, but it's voltage that provides the "pressure" to make the amperes flow. They are both necessary for flow and for rated flow. (It's not a great analogy, but it's the best one I can think of this evening.)