pressure drop in LPG lines
pressure drop in LPG lines
(OP)
what formula and friction factors is applicable when you want to determine the pressure drop in LPG lines?
thks
thks
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pressure drop in LPG lines
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RE: pressure drop in LPG lines
Best regards
Morten
RE: pressure drop in LPG lines
But what if vaporised LPG is to be piped?
RE: pressure drop in LPG lines
RE: pressure drop in LPG lines
When you mention a fluid to transport, you should identify its phase. There's a difference. Just like there is a difference between the Fanning Equation and the Darcy-Weisbach Equation (the Darcy friction factor = 4 x Fanning FF). If you are handling a gas or vapor instead of a liquid, the same basic Darcy-Weisbach relationship can be employed if the pressure drop is less than 10% of the initial pressure. This is to stay within reasonable accuracy. If you're handling a mixed, 2-phase fluid then you've got a worse problem. It gets really sticky and inaccurate.
Vaporized LPG is calculated for pressure drop just like any other pure vapor - with an appropriate gaseous calculation equation. Or, if the pressure drop is less than 10%, then you can use the D-W equation with reasonable accuracy. Otherwise, use an appropriate gas computer program or spreadsheet to calculate the pressure drop.
RE: pressure drop in LPG lines
Apart from that i agree with your comments re. knowing wich phase your dealing with is important and if there is a phase trancition and that multiphase is nmore difficult than single phase (at least for hand calc. allthough it take the same time when using a suited simulation tool).
Best regards
Morten
RE: pressure drop in LPG lines
Try www.engineeringpage.com - the pressure drop routines will do the calculation work for you