Re: Stepped Pipeline Calc Using Energy Method
RJB
Yes -- PNEU CALC is what I'm referring to
E-mail me a copy of your work file and I'll de-bug it for you
Send it to my address below
Regards ■
Re: Stepped Pipeline Calc Using Energy Method
Velocity is constantly changing in the conveying pipeline and is a major contributor to the conveying pressure loss, using average velocity value to calculate pressure drop is not recommended. But in any case if you step a pipe the air velocity reduces this alters the air only pressure drop and also the solid contribution to the pressure loss. Use your method to calculate or measure the pressure at the step then you can calculate the exit / inlet velocity at the step in both pipes and then use average for each section. ■
Re: Stepped Pipeline Calc Using Energy Method
Mantoo's suggestion is a valid one and there are other techniques which can be used as well. Manual calculations are sometimes very time consuming but the smaller line line increment you choose to investiagte results in a more accurate determination of pressure drop.
In your industry, velocities are very critical to maintaining the product's quality and elimination of angel hairs, streamers and other forms of debris.
If you are going to be doing this calculation on a regular basis, we offer a windows based program which makes the calculations for all line sizes and configurations, including stepped lines.
If you would like a demo, send me more details of your specific line routing and I'll make the calculation for you.
Send me the info to my e-mail address below
Regards ■
Pneucalc?
Jack,
Are you talking about Pneucalc. I do have a copy of that and I have some questions from the program:
- using the vacuum selection and solving for pressure drop, do you recommend using the volumetric flow rate at the minimum pickup velocity or a little higher?
- how do you account for pressured drop from the cyclone, filter receiver, and air only line from the cyclone to the inlet of the blower? What volumetric flowrate would you size the blower for?
- I am having problems using the capacity program on Pneucalc. It keeps giving me the error of 'Runtime error 5 Invalid Procedure call or argument'. Any help in finding out what's the issue and why I am getting this?
Thanks for your help on this. Could you also send me some information on the Cyclone Designer program (description, manual, cost)? I'm interested to look at it. My email is bobackr@gmail.com
Thanks. ■
Stepped Pipeline Calc Using Energy Method
Hello,
I am trying to find a strategy to use the energy method of calculating pressure drop in a stepped pipeline (already installed). I have literature on how to calculate the acceleration, lift, run, and elbow energy and also air alone pressure losses. But literature does not account for stepped pipelines. Do you calculate the pressure loss for the smaller line and then the larger line?
I can give more info on the method I'm talking about. It assumes an average velocity and uses it for the pressure drop calcs.
Thanks ■