Example

Determine the required enterance pressure at the mainline to serve the lateral in the above example. Consider $1m$ rizer height.

Solution

$Hm=Ha+[0\mathrm{.}75(Hf+He)+Hr]**9\mathrm{.}81,$Kpa

$Hf=HL-ac**L$ the actual friction head loss

$,=0\mathrm{.}0066\frac{m}{m}**400m=2\mathrm{.}64m$

$He=-2m(given)$

$Hm=310+[0\mathrm{.}75(2\mathrm{.}64-2\mathrm{.}0)+1\mathrm{.}0]**9\mathrm{.}81,$Kpa

$=324K{P}_a$