Pipe Flow Expert User Guide
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Table of Contents 7 Configuring the System Results .......................................................................................................... 169 Viewing the System Results ................................................................................................................ 172 Saving the System Results .................................................................................................................. 172 Exporting the System Results .............................................................................................................. 173 Redesigning the System ...................................................................................................................... 174 Amending the System .......................................................................................................................... 174 Create a PDF Report of the System Results ....................................................................................... 175 Calculation Theory and Method of Solution .............................................................................................. 177 Fluid Flow States ................................................................................................................................. 177 Fluid Viscosity ...................................................................................................................................... 177 Reynolds Numbers .............................................................................................................................. 178 Friction Factors .................................................................................................................................... 178 Colebrook-White Formula .................................................................................................................... 178 Friction Losses (resistance to flow) ..................................................................................................... 178 Darcy-Weisbach Formula .................................................................................................................... 179 Compressible Gas Flow Equations ...................................................................................................... 179 Fitting Head Loss ................................................................................................................................. 180 ’K’ Factor fitting head loss calculation .................................................................................................. 180 Calculate Total Pressure Loss ............................................................................................................. 180 Energy and Hydraulic Grade Lines ...................................................................................................... 181 Balanced Flow State ............................................................................................................................ 181 Loops, Nodes and Pipes ...................................................................................................................... 182 Solving the Flow versus Pressure Loss Balance ................................................................................. 183 System Calculation Tolerances ........................................................................................................... 184 System Components ............................................................................................................................ 184 Cv and Kv Flow Coefficients ................................................................................................................ 184 Sprinkler K Value Coefficients ............................................................................................................. 190 Flow Control Valves ............................................................................................................................. 191 Pressure Reducing Valves................................................................................................................... 191 Back Pressure Valves .......................................................................................................................... 193 Pumps (with Flow versus Head Curve) ............................................................................................... 194 Fixed Flow Rate Pumps ....................................................................................................................... 194 Fixed Head / Pressure Rise Pumps ..................................................................................................... 195 Net Positive Suction Head available .................................................................................................... 195 Two Phase Flow .................................................................................................................................. 195 Slurries ................................................................................................................................................. 195 Working with Compressible Fluids ............................................................................................................ 196 Using Compressible Flow Equations ................................................................................................... 197 Using Non-Compressible Darcy-Weisbach Equation .......................................................................... 198 |