Questions regarding the Tianjin University version of the professional examination for registered chemical engineers

2010-04-12View Original

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On page 207 of the Tianjin University version of the exam for registered chemical engineers, regarding the calculation of the effective height of a tower, it is given that Z = (NP–1) × HT. Why is 1 subtracted from the actual number of plates? I checked the Tianjin University version of the textbook and there was no subtraction of 1 there – is there some difference here? Could everyone please explain it?

Reply #22010-04-12

It’s easy to figure out: a board with 2 pieces has only 1 HT, one with 3 pieces has 2 HTs; a board with NP pieces has NP-1 HTs. Hehe, so it needs to be reduced

Reply #32010-04-14

I have encountered the same doubt as well; I hope someone with more knowledge can offer guidance.

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