Question

Do some internet or library research on the water towers in Bryan/College Station area to estimate: a) maximum municipal water supply pressure (based on water tower dimensions, not water pressure), b) average number of residents served per water tower, c) if the lowest pressure at the inlet to a home is 30 psig, estimate the friction losses associated with transporting municipal water through underground pipelines in terms of psig lost per mile of transport.

Answer 1

Hi There!

A.)First of all it is very much needed to you know the law for the Pressure and its variation with height of fluid column.

Here P = g h

Where P =Pressure (N/m2)

= Density of Water in (kg/m3)

h = Height of Water Column in the wate tower in( m)

B.) Find the total no. of towers in the area you select and Find the no. of reisdents. Simply Divide the no. of Residents with no. of towers.

Note :- The above Calculation was done considering equal capacity of tanks. For inequal individual Capacities use the Fraction Rule.

C.) Find the extreme Location from the tank supply. Find the Approximate distance the fluid need to travel.

After that Subtract the Value given 30 psig from Answer Obtained A.).

Note you Need to convert A.) in PSI unit.

Conversion Rule 1 PSI = 6895 N/m2

So Lets Say A.) Value as for Example For 50 m Height Comes down to

P = gh

= 1000*9.81*50

= 4,90,500 N/m2

To Convert it in PSI Divide it by 6895

= 71.15 PSI (g)

So Final Value for A comes down to 71.15 (PSI)

Now Let us Assume the most Remote Location to be 4 Miles.

Now 71.15-30 = 41.15 Psi (g)

So Friction Loss per Mile = 41.15/4=10.2875 Psi / Mile.

Thank You!

In case of Query Please Feel Free to ask