Calculation method of reflux volume in the CCC system

2019-01-22View Original

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The formula for calculating the compressor backflow flow rate in the CCC system is shown in the figure; Wr represents the mass flow rate of the backflow, f2d(IVP) is a function related to the anti-surge valve command, f2A(Rc) is a function related to the pressure ratio, Pd is the outlet pressure, and Td is the outlet temperature. There are two questions here: (1) The flow rate through a valve should be proportional to the pressure difference rather than to the pressure ratio; why is the pressure ratio used here? (2) Pd/√Td – this seems to be a method known as a \"flow similarity parameter.\" Generally, the flow similarity parameter is obtained by using the actual mass flow rate multiplied by √(T/P). What does this concept of similarity mean, and what is the purpose of using this formula?

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Calculation method of reflux volume in the CCC system

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