Pump shutdowns due to excessive head

[vd06]

Hi,

I have a network with 3 pumps feeding two tanks and the a direct feed network. Whenever the inlet pipes feeding the 2 tanks are shut basedon TWL, excessive head build up causes the pumps to shutdown. No matter what configuration i use to control the pumps based on level or speed time profile, i cant seem to get successful run of the model over a 24 hour period. For short periods, the model runs well. This model runs well in synerGee with the same data hence it should work in EPANET.

Can anyone help.

[u_jin347]

Dear Sir/Madam;

Good day. I would like to help you regarding your problem on pump breakdown due to excessive head, much better if you design a sequence controller what it will do is to operate each pump for operation of 8 hrs. each. Pump # 1 will start its operation at 6am then stop at 2pm. Pump #2 will start operating at 2pm then stop at 10pm, Pump #3 will start at 10pm then stop at 6am. the sequence will be in automatic mode and an assurance that there is always a pump running with in 24 hrs. wear and tear of pumps will be minimize with this system, for more info just send me a message,

Respectfully yours,

Ujin

SR. Water Resources and Facilities Operator

[Ahmed Gado]

Dear,

As the same reply of Mr.Ujin
enter a data of a new pattern i.e: no.2 of woking hours only
as no.1 would be used for the network demands
then in the properties panel of the pump enter the patt. no. 2
then repeat the cycle with each pump

PUMP1 Patt. 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PUMP2 Patt. 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
PUMP3 Patt. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1

1 and 0 are indication for workink hours




Another Solution:
look in the user Guide page 38 and try to apply the rules to the pumps


don`t forget to send me the result working or not


Yours,
Ahmad Gado
Environmental / Civil Engineer