Engineering Script

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Description	<div style="color: rgb(68, 68, 68); font-family: Consolas; font-size: 15px;"><div>This Python code calculates differential pressure or flow rate according to given pipe & fitting information for compressible fluid.</div><div><br><h2 style="margin: 0px; position: relative; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-alternates: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-variant-position: normal; font-weight: bold; font-stretch: normal; font-size: 14px; line-height: normal; font-family: "Trebuchet MS", Trebuchet, sans-serif; color: rgb(0, 0, 0);"><span style="font-family: Consolas;">Formula of DP and flow rate</span></h2></div><div><br></div><div>Calculate differential pressure in pipes based on information on the following pipes/accessory equipment</div><div><br>w    : Flow rate [lb/hr]<br>△P  : Delta Pressure [psia]<br>L    : Length [ft]<br>D    : Pipe Diameter [ft]<br>d    : Pipe Diameter [in]<br>ρ    : Density [lb/ft3]<br>f    : Friction factor<br><br></div><div>Here, Friction factor (f) must be calculated using separate charts and programs.<br><br></div><div>Calculation formulas based on CRANE BOOK<br><b><span style="color: rgb(128, 1, 128);"><br></span></b></div><div><b><span style="color: rgb(128, 1, 128);">Kpipe = f * l/D<br></span></b><b><span style="color: rgb(128, 1, 128);">K     = Kpipe + Kfitting<br></span></b><b><span style="color: rgb(128, 1, 128);"><br></span></b></div><div><b><span style="color: rgb(128, 1, 128);">compressible fluid<br></span></b><b><span style="color: rgb(128, 1, 128);">△P = (K * W^2) / (1891^2 * d^4 * ρ  * Y^2)<br></span></b><b><span style="color: rgb(128, 1, 128);">w = 1891 * d^2 * √(△P * ρ / K) * Y</span></b></div><p><b><span style="color: rgb(128, 1, 128);"><br>liquid fluid<br>△P = (K * W^2) / (1891^2 * d^4 * ρ)<br>w = 1891 * d^2 * √(△P * ρ / K)</span></b></p><h2 style="margin: 0px; position: relative; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-alternates: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-variant-position: normal; font-weight: bold; font-stretch: normal; font-size: 14px; line-height: normal; font-family: "Trebuchet MS", Trebuchet, sans-serif; color: rgb(0, 0, 0);"><b><span style="color: rgb(128, 1, 128); font-family: Consolas;">Python code</span></b></h2><div><b><span style="color: rgb(128, 1, 128);"><br></span></b></div><p><span style="color: rgb(43, 0, 254);">import math</span><br></p><span style="color: rgb(43, 0, 254);"><br>def compressibledp(W, l, d, r, Y, f, Kf):<br>    D = d * 12<br>    Kp = fl/D<br>    K = Kp + Kf<br>    dp = (Kpow(W, 2))/(pow(1891, 2)pow(d, 4)rpow(Y, 2))<br>    return dp<br><br>W = 220      # Flow rate (W, lb/hr)<br>l = 30.48    # Length (L, ft)<br>d = 1.969    # Pipe Diameter (d, in)<br>r = 0.0774   # Density (ρ, lb/ft3)<br>Y = 1.0      # Net Expansion Factor (Y)<br>f = 0.005    # Friction factor (f)<br>Kf = 500     # Resistance coefficient of fittings<br><br>dp = compressibledp(W, l, d, r, Y, f, Kf)<br>print("delta pressure of pipe = ", dp, "psia")<br><br>def compressibleflow(dp, l, d, r, Y, f, Kf):<br>    D = d 12<br>    Kp = f * l / D<br>    K = Kp + Kf<br>    W = 1891 * pow(d, 2) * math.sqrt(dp * r / K) * Y<br>    return W<br><br>dp = 5.933   # Delta Pressure (△P, psia)<br>m = 30.48    # Length (L, ft)<br>d = 1.969    # Pipe Diameter (d, in)<br>r = 0.0774   # Density (ρ, lb/ft3)<br>Y = 1        # Net Expansion Factor (Y)<br>f = 0.005    # Friction factor (f)<br>Kf = 500     # Resistance coefficient of fittings<br><br>flow = compressibleflow(dp, l, d, r, Y, f, Kf)<br>print("mass flow of pipe = ", flow, "lb/hr")<br></span><p>When run the code, you will receive the following results.</p><span style="color: rgb(43, 0, 254);">delta pressure of pipe =  5.82 psia<br></span><span style="color: rgb(43, 0, 254);">mass flow of pipe =  222 lb/hr</span><div><br></div><div><br></div></div>