Friction Losses Claculation
Friction Losses Claculation
(OP)
I am dealing with a pumping system for the transportation of 30 m3/day.There is another stream with 1 % suspended solids .That stream is 150 m3/day.Total is 180m3/day
MY enquiry is
1-On what baiss I will calculate head losses ie taking clean water into account or sewerage water...
2-the fluid has to be transported to 1.2 km
3-There is no height involved during transportation
like the pipe will be at the ground level through out
so on what basis I will calculate friction losses
I am thinking to use a 4 inch poly pipe
Thanks
MY enquiry is
1-On what baiss I will calculate head losses ie taking clean water into account or sewerage water...
2-the fluid has to be transported to 1.2 km
3-There is no height involved during transportation
like the pipe will be at the ground level through out
so on what basis I will calculate friction losses
I am thinking to use a 4 inch poly pipe
Thanks





RE: Friction Losses Claculation
Set a low limit to the velocity of 1 m/s to keep the water moving fast enough so that solids are not allowed to settle at any low spots in the pipeline.
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: Friction Losses Claculation
The way the system is to operate will govern the pipe line diameter to use.
Phitsanulok
Thailand
RE: Friction Losses Claculation
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: Friction Losses Claculation
The maximum flow rate is important to understand. As Artesi says, is the flow continuous throughout the day? Re the friction, for 1% sewage you can assume Newtonian flow. If you use Darcy to calculate then you can factor in the slightly different density / viscosity into the Reynolds number calculation but you will find it won't be significantly different a result to a clean water calculation.
4" poly pipe would seem appropriate - you wouldn't want to go smaller than this for a sewage rising main but if the flow is continuous you will have a low velocity. In that case you should look at a a daily flush of the pipe (stop the pumps, let the flow build-up in the pumping station and then run to give say a 1.2m/s pipe velocity.
Regards