Search found 365 matches

by admin
Wed Mar 20, 2019 8:51 am
Forum: Flow calculators and fluid flow problems
Topic: Need Help with an Air Tank Problem
Replies: 1
Views: 9

Re: Need Help with an Air Tank Problem

You should also know how many strokes you have in a min or hour? So you calculate a needed flow as a volume of the cylinder * number of strokes; Q = V * n, where is Q - is a flow, V - is volume, n - is a number of strokes in a unit of time. Another question is if you have a compressor to fill the ta...
by admin
Wed Feb 20, 2019 8:21 pm
Forum: Flow calculators and fluid flow problems
Topic: Gas Constant
Replies: 3
Views: 2495

Re: Gas Constant

It is not changing with the pressure or the temperature. It is constant for a certain gas. R in terms of J/kg K is calculated as Ru/M where Ru is universal gas constant for any gas and particular molar mass. Ru = 8.314 J/mol K. In your formula pV=nRT you are using Ru. in a pV=mRT or p/rho = RT formu...
by admin
Wed Dec 05, 2018 9:45 pm
Forum: Flow calculators and fluid flow problems
Topic: Pressure drop Calculation.
Replies: 2
Views: 326

Re: Pressure drop Calculation.

First, you have to enter absolute, not gauge pressure.
Check the pipe diameter that you are entering, as well as critical pressure and temperature for LPG.
Also, select to enter w (on the right side of the calculator) and then enter mass flow rate.
Hope this helps.
by admin
Fri Sep 28, 2018 7:54 am
Forum: Flow calculators and fluid flow problems
Topic: Pressure drop answer compare to Darcy Weisbach
Replies: 3
Views: 610

Re: Pressure drop answer compare to Darcy Weisbach

Hi,
Here is the equation used in the calculator:
https://www.pipeflowcalculations.com/pi ... cy-formula

You can press copy button in the calculator and your results will be in clipboard, and then paste here to check.

Zoran
by admin
Fri Jun 22, 2018 7:12 am
Forum: Flow calculators and fluid flow problems
Topic: How to select which calculator
Replies: 1
Views: 826

Re: How to select which calculator

I would suggest you to use gas pressure drop calculator.
by admin
Tue Apr 24, 2018 6:27 am
Forum: Flow calculators and fluid flow problems
Topic: What is the assumed pipe material for the natural gas calculator?
Replies: 3
Views: 2349

Re: What is the assumed pipe material for the natural gas calculator?

Natural gas calculator is for up to 100 bar so it is surely steel pipe.
by admin
Sat Nov 25, 2017 1:44 pm
Forum: Flow calculators and fluid flow problems
Topic: equivalent length
Replies: 2
Views: 2777

Re: equivalent length

You can find one on the left side menu called K factor - fittings.
by admin
Tue Apr 04, 2017 6:52 pm
Forum: Flow calculators and fluid flow problems
Topic: Flow between the Vessels
Replies: 4
Views: 4401

Re: Flow between the Vessels

I have used my calculator for gas flow on pipeflowcalculations.com. As you say the fluid is air than one can use air pressure drop calculator available on the same web site. I have divided the process into segments: A. What I have done is calculate flow rate for 12 bar inlet and 6 bar outlet. B. Aft...
by admin
Sat Apr 01, 2017 8:06 am
Forum: Flow calculators and fluid flow problems
Topic: Flow between the Vessels
Replies: 4
Views: 4401

Re: Flow between the Vessels

This type of calculation requires differential equation solution, meaning it is not an easy task, because the pressure on the exit of the pipe line is changing from 6 bar to 12 bar, and flow through connecting pipeline slows every moment. As you want to fell 5000 m3 tank through 1" pipe - I can tell...
by admin
Sat Apr 01, 2017 7:35 am
Forum: Flow calculators and fluid flow problems
Topic: Thrust from open gas line?
Replies: 2
Views: 3712

Re: Thrust from open gas line?

It is density x velocity^2 x area