Steam Pipe Pressure Loss Calculation
The pressure loss in the steam pipes is calculated, and the local losses caused by fittings such as elbows and tees must also be included.
Not :
If pressure unit as bar G, mbar G etc, the inlet pressure is upper pressure.
if pressure unit as bar Abs, mbar Abs etc, the inlet pressure is absolute pressure.
The formula used is the Colebrook–White equation for turbulent flow (Re>4000). (Formula \ref{eu_Colebrook})
\begin{equation}\label{eu_Colebrook}
\frac{1}{\sqrt{f }}=-2\log \left ( \frac{2.51}{Re\sqrt{f}}+\frac{\varepsilon /D}{3.71} \right )
\end{equation}
From the Darcy-Weisbach equation (Formula \ref{darcy}), the friction loss along the pipe is found.
\begin{equation}\label{darcy}
\displaystyle{\Delta P=f\displaystyle\frac{L}{D}\displaystyle\frac{\rho v^{2}}{2} } \qquad \text{[Pa]}
\end{equation}
Here, \(\small f\) is the dimensionless friction coefficient, \(\small D\) is the inner diameter [m], \(\small Re\) is the dimensionless reynolt number, \(\small\varepsilon\) is the roughness [m], \( \small L\) is the pipe length [m], \(v\) is velocity [m/s], \(\rho\) is the dencity [kg/m3].
Literature : Thermophysical Properties of Fluid Systems, https://webbook.nist.gov/chemistry/fluid/ (19/03/2022)
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