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Liquid Pipeline Pressure Loss From The AGA Equation
Calculate pressure loss for single phase liquid pipelines using the AGA equation. `Tr = 4 log(3.7 / (rr)) `
`Ts = 4 log((Re) / (Ts)) - 0.6 `
`Tt = 4 Df log((Re) / (1.4125 Ts)) `
`Tf = min(Tr, Tt) `
`fd = (2 / (Tf))^2 ` where : Tr = rough pipe transmission factor
Ts = smooth pipe transmission factor
Tt = turbulent pipe transmission factor
Tf= Fanning transmission factor
fd = Darcy friction factor
rr = pipe relative roughness
Re = Reynolds number
Df = AGA drag factor The AGA equation is used to calculate the Fanning transmission factor using an iteration method. Check that the convergence is close to or equal to one. The pressure loss is calculated from the Darcy friction factor using the Darcy-Weisbach equation. For low Reynolds numbers Re < 2000, the fluid flow is laminar and the Darcy friction factor should be calculated using the Hagen-Poiseuille laminar flow equation. For high Reynolds numbers Re > 4000, the fluid flow is turbulent and the Darcy friction factor should be calculated using the AGA equation. In the transition region 2000 < Re < 4000, the flow is unstable and the friction loss cannot be reliably calculated. Pipe bends can be specified as either a bend angle, AGA bend index (degrees of bend per mile), or AGA drag factor. The drag factor is interpolated from the AGA table. The drag factor includes pipe roughness. Valves, tees and other pipe fittings should be included by adding a minor loss equivalent length to the pipeline length. Change Module : Related Modules :
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CALCULATOR : Single Phase Liquid Pipeline Pressure Loss From AGA Equation [FREE] ±
Calculate liquid pipeline outlet pressure from volume flow rate and diameter using the AGA equation. The AGA equation was developed for hydrocarbon pipelines. Minor losses are calculated from the pipe bend index (bend degrees per mile). Tool Input- schdtype : Pipe Schedule Type
- diamtype : Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- visctype : Viscosity Type
- μu : User Defined Dynamic Viscosity
- νu : User Defined Kinematic Viscosity
- voltype : Fluid Flow Rate Type
- Qu : User Defined Volume Flow Rate
- Mu : User Defined Mass Flow Rate
- Vu : User Defined Fluid Velocity
- Reu : User Defined Reynolds Number
- rfactype : Pipe Internal Roughness Type
- dfactype : AGA Drag Factor Type
- θu : User Defined Total Bend Angle
- BIu : User Defined Bend Index
- Dfu : User Defined Pipe Drag Factor
- fdtype : Darcy Friction Factor Type
- fdu : User Defined Darcy Friction Factor
- ρ : Fluid Density
- L : Pipe Length
- zi : Inlet Elevation Relative To Datum
- zo : Outlet Elevation Relative To Datum
- Pi : Inlet Pressure
Tool Output- ΔP : Friction Pressure Loss
- μ : Dynamic Viscosity
- Df : AGA Pipe Drag Factor
- ID : Inside Diameter
- M : Mass Flowrate
- Po : Outlet Pressure
- Q : Volume Flowrate
- Re : Reynolds Number
- V : Fluid Velocity
- cvg : Convergence Factor (≅ 1)
- fd : Darcy Friction Factor
- ff : Fanning Friction Factor
- rr : Surface Roughness Ratio
- td : Darcy Transmission Factor
- tf : Fanning Transmission Factor
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