Choke/Orifice Sizing
Choke/Orifice Sizing
(OP)
How would i go about selecting the correct choke to create a 600 psi pressure drop with a pump rate of 2 bpm.
The inlet pipe i.d. is 2". Thanks.
The inlet pipe i.d. is 2". Thanks.
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RE: Choke/Orifice Sizing
Do you mean 2 GPM?
What is the fluid media?
RE: Choke/Orifice Sizing
RE: Choke/Orifice Sizing
RE: Choke/Orifice Sizing
RE: Choke/Orifice Sizing
Flow rate = C * Cd * D * Sqrt(Pressure drop/liquid density)
C is a constant depending upon units (bpm, 64ths, psi, ppg etc).
Cd is a choke co-efficent supplied by the manufacturer for different bean sizes & Reynolds number
For a choke to work, the flow through it must must be critical, which is generally taken as Pressure upstream / pressure dopwnstream is greater than about 2.
RE: Choke/Orifice Sizing
Be really careful designing anything for pumping a cross-linked gel using the standard correlations. These corelations are generally based on Newtonian fluids and cross-linked gels rarely have a linear stress vs. strain relationship. Many of them behave like Bingham plastics (i.e., like toothpaste they behave more like a solid than a liquid until the strain reaches a certain point, then they flow like a Newtonian fluid).
You probably have already thought of all of this, but I just wanted to raise this point. I've seen several poor-boy frac operations get into trouble when the field guys put in a pipe choke that wasn't in the original design and caused the system to be on the wrong side of some stress-strain curve.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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RE: Choke/Orifice Sizing
This sounds like the rule of thumb for a gas or vapor to me. You may want to re-check this. The OP is asking about a liquid.
Good luck,
Latexman