Regarding the Aspen feed issue
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When calculating the distillation column today, I entered an feed flow rate of 1 cum/hr, and the resulting feed flow rate was 1.147 cum/hr. Why is that?
It’s the difference between the actual flow rate and the standard flow rate, right?
What does this standard flow rate refer to? Do the results need to be corrected?
It refers to the actual flow rate under your operating conditions and the flow rate after conversion under standard conditions; since temperature and pressure vary, the volumetric flow rate will naturally differ as well. If you’re not sure, use the mass flow rate, which is independent of temperature and pressure