08-07-2010, 07:43 PM
Hello all, I want to add also cype 2011b posted by Benny.P, wich contain a module for such design.
But let's start with data needed for design:
1- hourly average demand (projected number of citizen*demand per citizen)
2- daily and hourly pic coefficient
3- fire stations positions
4- network to be designed
5- tank position
Then you calculate
1- pic hourly demand Qphd,
2- specific flow Qsf=Qphd/TOT lenghth of network
3- demand flow per pipe : Qfp=Qsf*L (pipe)
4- demand in the nodes assuming that every pipe will offer 50% in the beginning and 50% in the end
All this calculation is necessary to apply hardy cross method to calculate diameter, pressure, flows, velocity, tank elevation, pumps...
Regards
But let's start with data needed for design:
1- hourly average demand (projected number of citizen*demand per citizen)
2- daily and hourly pic coefficient
3- fire stations positions
4- network to be designed
5- tank position
Then you calculate
1- pic hourly demand Qphd,
2- specific flow Qsf=Qphd/TOT lenghth of network
3- demand flow per pipe : Qfp=Qsf*L (pipe)
4- demand in the nodes assuming that every pipe will offer 50% in the beginning and 50% in the end
All this calculation is necessary to apply hardy cross method to calculate diameter, pressure, flows, velocity, tank elevation, pumps...
Regards