Problem 35. A two-phase 24-inch ID horizontal separator needs to handle 1,000 bbl/d with a liquid retention rate of... The difference between the effective, manufactured, and seam-to-seam lengths of the separator in the two GOR scenarios calculates respectively closest to (ft): (A) 0, 5, 1; (B) 0, 2.5, 1; (C) 0, 0, 2; (D) 1, 2.5, 0.
This is a similar problem as shown in the Guidebook example. It just uses 2X liquid retention and 2X fraction full. I like the problem because it gives a person experience in calculating each type of length. This problem thus calculates to:
1. Effective length: both GOR options give the same Le, so 3.4 – 3.4 = 0 ft.
2. Manufactured length: liquid/gas dominate so 7.5 – 5 = 2.5 ft.
3. Seam-to-seam length: liquid/gas dominate so 5.4/4.55 so 5.41 – 4.55 = 0.86 ft.
The Guidebook presentation of separator problems is a highly-organized single page for rapid use.
I know this is basic... but where did the 7.5 & 2.5 come from for the manufactured length?
ReplyDeleteI'm not sure I understand the question...if I do, it's just how the manufacturers build them. Check?
DeleteWhat the user above is asking is where do the values come from? A table where the manufactured lengths closest to the calculated values that satisfy the design and if so where is said table? Or are the 7.5' and 5' calculated values and if so how are they calculated?
DeleteIt's industry standard to make them in those increments. So if you want to increase length, you have to choose a length to match these increments.
Delete