Effect of tie-in point downstream of Pump
Effect of tie-in point downstream of Pump
(OP)
Hi all,
My first post on these forums.
Hopefully this will be an easy one to answer:
I've been asked to review how/if tie-ing a water main to a Methanol flowline will effect the Methanol pumps upstream of the tie-in point. I'm trying to figure out if an increase in density or if a change in compressibility (which I think should be very low) will have any adverse effect on the pumps. The water tie-in will be fully rated and at a pressure similar to the Methanol. Both liquids are pumped using PD pumps as well.
I can't see there being any adverse effect, but thought it might be a good idea to get a few more opinions.
Any input would be much appreciated.
Ross
My first post on these forums.
Hopefully this will be an easy one to answer:
I've been asked to review how/if tie-ing a water main to a Methanol flowline will effect the Methanol pumps upstream of the tie-in point. I'm trying to figure out if an increase in density or if a change in compressibility (which I think should be very low) will have any adverse effect on the pumps. The water tie-in will be fully rated and at a pressure similar to the Methanol. Both liquids are pumped using PD pumps as well.
I can't see there being any adverse effect, but thought it might be a good idea to get a few more opinions.
Any input would be much appreciated.
Ross





RE: Effect of tie-in point downstream of Pump
The pressure seen by the pump will increase due to increased density so any elevation changes will cause the pressure seen to increase, more flow equals a higher head / pressure required to move more fluid through the same size pipe and water has a higher viscosity than methanol hence higher unit losses per flow per unit distance.
Higher pressure for the same flowrate in a PD pump means more power consumed.
Calculate the pressure required to pump your methanol then separately calculate it for your new (higher) flowrate of this water / methanol mix.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Effect of tie-in point downstream of Pump
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way