You are asked to design a pump station to conveywaste water at a
flow rate of 250 cubic meters per hour to anequalization tank. a
velocity of at least 3ft/s must be maintainedin the pipe to prevent
deposition and provide scouring of anypreviously deposited solids.
however, a maximum velocity of 10ft/sis prescribed to prevent
oversizing the pumps. due to the nature ofthe waste water, you want
to target the high end of this range. find the proper diameter pipe
to the nearest 2" to achieve thisdesign objective.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj