Question

1) A water fountain is to be installed at a remote location by attaching a cast iron pipe directly to a water main through which water is flowing. The entrance to the pipe is sharp-edged 15m (K-0.5), and the 15m long piping system involves three 90 bends without vanes (K1.1), a fully open gate valve (K.-0.2), and a fully open angle valve (K-5). If the diameter of the pipe is 2 em and the system is to provide water at a rate of 1.2 10 m''s and the elevation difference between the pipe and the fountain is negligible (z"z), determine the req P-? main pressure in the piping system. kg Recommended Procedure: (70 points) Find the Reynolds Number and determine the tyne of the flow (be careful finding the velocity). b) Find the friction factor f. If the flow is turbulent Use the roughness value for cast iron as 0.26 mm ii. Determine the friction factor by the Colebrook Equation ii. Start the iteration with an initial value of 0.0100 for f iv. Repeat the iteration until the value of f does not change (maintain 3 significant digits) e general energy balance between points I and 2 and cancel the irrelevant terms (assume the velocity at a,-1, take the atmospheric pressure to be 101300Pa. c) Write th point 1 to be too small, take the kinetic energy correction factor d) Find the major head loss in m. e) Find the minor head loss in m (K values for standard elbow 0.3, sharp entra open-0.3, gate fully open-0.2, ignore pump inlet and exit) f) Find the the required absolute pressure in the piping system. ce-0.5, sharp exit-1.0, gate half

Please solve a,b,c,d,e,f

Answer 1

without vano k, 1. Fu00 Fully om ca) .D

Colebs.sop s CLH.S to L4.8o83 5.1317 2. 0 02 7071 4.836 2.23J 3. 5.773 0.91ч 5 6-1 ч3 5. 4.862 -039. tai

: 육뿍th mata,_ 23.62m Cen Minas lo . gate valve 괘/Ahow 2.lert ano 2 am 38222362 766 29

P, 1000x9.81/61300 t3.822 +2362+7.GS