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# Digital Engineering Handbook

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## Pressure loss calculation in a straight pipe

 • Pressure drop in a pipe changes with varying pipe length, pipe diameter and volume flow. • Pressure drop in a pipe changes with varying physical properties and roughness of the inner pipe surface?

## System curve and pump curve

 • Pressure drop in straight piping, in a 90° bend, pressure drop in valves, filters, heat exchangers etc. • Check where your system curves and pump curves meet best for your point of operation. • Start the pressure drop calculation of your plant with an interactive flow sheet: pump below or above liquid, filling from the top or the bottom, closed loop. • Up to 3 system curves: how does pressure drop in your piping change with varying volume flow, storage levels, surface roughness, pyhsical properties (density, viscosity) and/or different designs of piping, valves, filters, heat exchangers etc. • Up to 5 pump curves: compare different pump types and models. Further options are pumps in series, pumps in parallel and the variation of speed.

## Pipe insulation and heat losses

 • Determine the influence of pipe diameter and insulation (thickness, thermal conductivity, thermal bridges) on the heat transfer. • How does the insulation of your piping behave with varying ambient temperatures and wind speed? • Check the perfomance of your pipe insulation once the liquid stopped flowing.

## Pipe span and pipe weight

 • Determine the pipe span. How do pipe material and medium influence the pipe span? • What will be the value of the maximum deflection of your pipe? • The calculation delivers the pipe weight per unit lenght including medium and insulation.

## Water hardness convert

 • Density, dew point, enthalpie and much more dending on temperature, pressure and relative humidity. • Calculation of two stes of parameters at constant mass flow of dry air. • Wet bulb temperatur: calcultion, explanation and derivation.

## Water pumps EU 547-2012

 • Hydraulic pump efficiency water pumps EU 547-2012 at best efficiency point (BEP). Designs ESOB, ESCC, ESCCi, WS-V, WSS. • Calculation of nominal power and thermodynamic work.

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