Dear all colleagues,
I am evaluating the required size of a free vent to be installed in a new atmospheric tank.
Normally I would follow the API STD 2000 to determine inbreathing/out breathing (including thermal in/out breathing) requirements, and then proceed with a hydraulic calculation to...
Dear Colleagues,
Please see the following discussion related with sealing flow. I believe this could determine which flow makes this system partially-filled or full-filled:
http://www.eng-tips.com/viewthread.cfm?qid=177112
I think for an horizontal and vertical pipe, it is possible to use the...
Good morning,
Mr. EnergyMix,
It’s not necessary to apologize. I only wanted to clarify that this is not homework in order to continue with the discussion. Moreover, I think of myself as a “student” since I have been working just for few years (5) and I am still learning and understanding new...
Good morning,
Yes I have used it, but the "Manning Equation", the "Open channel flow" and the "partially filled pipe" topics discuss atmospheric gravity lines. Could I use the same equations for system under pressure?
Best Regards,
Lij.
Good morning,
Mr. EnergyMix,
I finished my university a few years ago. This is not a school work. I was evaluating new hydraulic software and among the assumptions used they include “full filled pipe”, so I start wondering, what happens if this is not the scenario. That’s why I created this...
Hello Dicksewerrat,
For the sake of the argument, the control system works.:)
However, with regard to your comment: this issue is not only for my imaginary system. If the tank 2 is atmospheric, you still should take into account the inbreathing and out-breathing flows, and size a free vent to...
Good afternoon,
Please find attached a sketch of this “imaginary system”. Let’s imagine that the Second tank, has a control system that keeps the pressure in 50 psig. Now, when the pump starts, the discharge pipe is filled with vapour (or pressurized air, my point is the system is not...
Hello Dear Colleagues,
I'm wondering if it's possible to have a partially-filled pipe but under pressure (no gravity flow).
I was thinking of a pair of tanks and a pump. The second tank is higher than the first one, and it operates at 50 psi. The pump have to overcome the static height and...
Thank you all for your answers.
My questions are basically on how the factors was estimated (eg "a": annual depreciation on the pipeline, "Le'":factor for friction in fitting), if the equation can be used for any pumping system (centrifugal pumps, rotative pumps, etc), what are the...
Good afternoon,
I was reading an article in Chemical Engineering magazine that talked about how to calculate the optimum diameter for a pipe, and it talked about a "Generaux Equation." I was not able to find information on the equation or about the factors. Anyone have information?
Regards,
Lij
Good afternoon Latexman,
I think it is important to consider the environment because when the fluid enters the drag causes to require less static column to avoid splattering the roof.
Regards,
Lij
Good afternoon,
I'm doing the calculation of a distribution pipe (perforated pipe) and according to my calculations came to the hole with 25 psig. From there the fluid enters a highly viscous media -The distribution pipe is used to mix the fluid inside using pressure-
My question: there is any...
Good morning,
I have three side entry mixer on a storage tank. Those mixers were designed for homgenize oil (18° API) but now, I want to use them for mix an heavy oil (12° API) and some light oil (45° API). Do you know some expresion to estimate the new energy consumption for that change in...
Good morning,
I have been searching in Chemical Engineering Magazine. I found this articles:
http://www.che.com/articles/1985-1999/Vol95/chevol95_num18_437.html
http://www.che.com/download/facts/CHE_Facts_1208.pdf
http://www.che.com/articles/1985-1999/Vol95/chevol95_num18_430.html
Regards, Lij
Good morning,
I have to pump a non-newtonian fluid (an emulsion). I know some lab properties of the fluids (enough to estimate the apparent viscosity) but I'm not sure of what set of equations I should use. Do you have any good reference where I can find simplified equations for make a good...
Good evening,
There is a water level because the drums is located next to compressors, and the air is saturated at that point. It will occur some condensation in the drum and if you take into account that we are handle a really big flow, it is possible to reach the 3 ft of water.
Regards,
Lij
Thank you tickle & Ben for your responses.
I am trying to do a dynamic calculation to determine what is most important: the vaporization or the increase in the temperature of the air. If anyone have extra information I will appreciate it.
Regards,
Lij
