Help! ~How to select the crude oil blending ratio as the dependent variable in sensitivity testing
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As the title suggests, in vacuum distillation simulations, I want to use sensitivity testing to determine the crude oil blending ratio that has an impact on the constant pressure line or the recovery rate. How to select the blending ratio as a variable in the sensitivity test, that is, in mixdoil under assay/blend in components. The main goal is to use sensitivity testing to study the impact of different mixing ratios on product yield and the drawing rate. If pursuing sensitivity isn’t feasible, what other options are there? I earnestly ask for your wise advice; I am extremely grateful!
I won’t back down; if someone’s amazing, they won’t be noticed. I’ll hold my ground, I really will!
This post was last edited by yaojin911 on 2011-8-24 at 11:07. Old Fan, what the hell are you doing? Let me give you some advice. ““Mixdoil” is something you define on your own; who can understand it when it’s presented in that form? You need to be open-minded and use a mixer as a tool for controlling the mixing ratio. When conducting sensitivity analysis, use one of the assays as a benchmark and the other as an independent variable. I’ve tried it – there’s almost no difference in the boiling range of the crude oil obtained through blending compared to that obtained using a mixer. For more details, see the data below: PT3 was mixed using a mixer, while PT5 represents the results of blending the two assays; they are very similar. Weight percent 1 0 True boiling point 3 3.14148536 True boiling point 5 3.33944317 Weight percent 2 5 True boiling point 3 66.2965766 True boiling point 5 66.5629645 Weight percent 3 10 True boiling point 3 98.4460995 True boiling point 5 98.7270486 Weight percent 4 30 True boiling point 3 157.750103 True boiling point 5 157.979519 Weight percent 5 50 True boiling point 3 226.042463 True boiling point 5 226.633248 Weight percent 6 70 True boiling point 3 293.144547 True boiling point 5 293.558748 Weight percent 7 90 True boiling point 3 380.250166 True boiling point 5 380.517986 Weight percent 8 95 True boiling point 3 423.663667 True boiling point 5 423.805759 Weight percent 9 100 True boiling point 3 457.939827 True boiling point 5 457.923398
Reply to 4# yaojin911: Haha, what a great post! ! ! Let’s talk in person! !
Reply to 5# fanzhongwen007: I thought about it at noon and now I know how to do it. It can solve your problem of huge workload, and no Fortran is required either; it also allows for a fixed flow rate into the tower. Please treat me to some Dapanji, and I’ll tell you the details when we meet.
Reply to 6# yaojin911: Is it true? If we’re playing Battle Royale, we should take the wife along too! ! !
This post was last edited and replied to by yaojin911 on 2011-8-27 09:35. Reply 7# fanzhongwen007: There’s no need to ask; it’s obviously true. In this way, assuming you have N types of crude oil to be mixed, you use the flow rates of these N-1 crude oil streams as independent variables and feed them into a mixer. The mixer is then connected to a split device that divides the flow; this split device has two outlets – one for draining and one for feeding into the tower. The flow rate of the stream going into the tower is set to a desired value, for example 10,000 kg/h. This approach allows the total flow rate of the mixed crude oil to vary freely without affecting the flow rate into the tower. Based on your situation, use the one with the highest flow rate as a benchmark and set it to 10,000 kg/h (this is to prevent severe feeding shortages and errors that may occur when all variables are at their minimum values). For the other flow rates, define a range of values and specify the number of points or step size for automatic assignment; let’s assume M points are used. The quantity you want to examine serves as the dependent variable; once it is set, a sensitivity analysis can be conducted. I seek Professor Fan’s guidance!