Pump — ConduitNET Help

Pumps are devices that impart energy to a fluid thereby raising its hydraulic head.

The principal input parameter for a pump is its pump curve (the combination of heads and flows that the pump can produce).
In lieu of a pump curve, the pump could be represented as a constant power device.
The principal output parameters are flow and head gain.
Flow through a pump is unidirectional. If the system requires more head than the pump can produce, the pump is shut down. If it requires more flow, the pump curve is extrapolated to produce the flow even if a negative head results. In both cases a warning message is issued.
Pumps can be turned on and off at preset times, when tank levels fall below or above certain set-points, or when nodal pressures fall below or above certain set-points through the use of controls and time patterns.
Variable speed pumps can also be considered by specifying that their speed setting be changed under these same types of conditions. By definition, the original pump curve supplied to the program has a relative speed setting of 1. If the pump speed doubles, then the relative setting would be 2; if run at half speed, the relative setting is 0.5 and so on.
EPANET can also compute the energy consumption and cost of a pump. Either pump-specific efficiency curves and energy pricing parameters can be supplied or global energy options will be used.

Below is the list of Pump properties:

Field	Description
Id	A unique label used to identify the pump.
Start Node	The ID of the node on the suction side of the pump. This is a required property.
End Node	The ID of the node on the discharge side of the pump. This is a required property.
Pump Curve	The ID label of the pump curve used to describe the relationship between the head delivered by the pump and the flow through the pump. Leave blank if the pump will be a constant energy pump (see below).
Power	The power supplied by the pump in horsepower (kw). Assumes that the pump supplies the same amount of energy no matter what the flow is. Leave blank if a pump curve will be used instead. Use when pump curve information is not available.
Speed	The relative speed setting of the pump (unitless). For example, a speed setting of 1.2 implies that the rotational speed of the pump is 20% higher than the normal setting.
Pattern	The ID label of a time pattern used to control the pump's operation. The multipliers of the pattern are equivalent to speed settings. A multiplier of zero implies that the pump will be shut off during the corresponding time period. Leave blank if not applicable.
Initial Status	State of the pump (open or closed) at the start of the simulation period.
Efficiency Curve	The ID label of the curve that represents the pump's wire-to-water efficiency (in percent) as a function of flow rate. This information is used only to compute energy usage. Leave blank if not applicable or if the global pump efficiency supplied with the project's Energy Options will be used.
Energy Price	The average or nominal price of energy in monetary units per kw-hr. Used only for computing the cost of energy usage. Leave blank if not applicable or if the global value supplied with the project's Energy Options will be used.
Price Pattern	The ID label of the time pattern used to describe the variation in energy price throughout the day. Each multiplier in the pattern is applied to the pump's Energy Price to determine a time-of-day pricing for the corresponding period. Leave blank if not applicable or if the global pricing pattern specified in the project's Energy Options will be used.