Confusions regarding pipeline characteristics
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As the title suggests, I’ve recently been confused by the relationship between pipeline pressure and flow rate, velocity, and valve opening degree. ① Can it be understood that pipes are thinner under high pressure and thicker under low pressure? According to PV=nRT, when the amount of substance in the entire system remains constant, n is fixed and thus the right side of the equation remains constant. To keep the left side equal, should the volume be smaller at higher pressures, or should the pipes be narrower? ②The volumetric flow rates indicated by the flow meters on the compressor pipelines entering and leaving the factory are actually almost identical (orifice plate flow meters)? How to explain this?
One thing to remember about pipes is that the mass flow rate remains constant within the same pipe (ignoring leaks); when performing calculations elsewhere, it is necessary to first identify the independent variables and dependent variables
Could you explain it in detail with examples?
This post was last edited by Qing_Xue on 2015-7-25 08:07. Well, I rarely calculate these things; I just make an approximate estimate of the diameter. Moreover, I usually work with liquids – I’ve never worked with gases. You can take a look at the chapter on fluid transport in Principles of Chemical Engineering
I’ve seen it; it’s indeed helpful for the chapter on Principles of Chemical Engineering and Fluid Conveyance Machinery.
I’ve seen it; it’s indeed helpful for the chapter on Principles of Chemical Engineering and Fluid Conveyance Machinery.