Cómo introducir una bomba en EPANET | | UPV

Introduction to Pump Curves

Overview of Pump Curves

• Javier Soriano introduces the topic of how to input a pump curve into the software Planet, along with basic concepts about pumps and their assignment in the program.

• The pump curve is represented hydraulically using a parabola, where the horizontal axis indicates flow rate and the vertical axis represents energy or height provided by the pump.

Characteristics of Pump Behavior

• The parabola illustrates operational points for the pump; it can function at any point above its characteristic curve.

• Flow rates are measured in liters per second or cubic meters, while height is expressed in meters of water column.

Selecting and Inputting Data

• The discussion focuses on selecting a specific characteristic curve from a manufacturer’s catalog, particularly one corresponding to a 165 mm impeller diameter.

• A design flow rate of approximately 5 liters per second and a height of around 32.5 meters are established as target operating conditions for the pump.

Entering Data into Planet Software

Steps for Data Entry

• To input data into Planet, users navigate to the data tab and select behavior curves to create a new curve.

• Users must provide an identifier for the curve, including descriptions such as type or model of the pump.

Characterizing Pump Behavior

• Users enter flow rate and height data points to characterize hydraulic behavior; visual representations and analytical equations may be generated by Planet.

Methods for Curve Input

Single Point Method

• One method involves entering just one design point (flow rate and height), which allows Planet to complete additional information based on two extra points: maximum head at zero flow and maximum flow at zero head.

Multiple Points Method

• Alternatively, three points can be entered (design point plus max/min), allowing Planet to fit these points into a polynomial equation rather than just quadratic.

Advanced Curve Input Techniques

Cloud of Points Method

• A more complex method involves inputting multiple points from catalogs; care must be taken regarding increasing/decreasing heights relative to flow rates.

Comparison of Methods

Understanding Pump Behavior in Design Zones

Characteristics of Pump Operation

• The behavior of a pump varies significantly outside its design zone, where it may not perform consistently. Caution is advised when operating the pump beyond this designated area.

• Utilizing multiple points to define the characteristic curve of a pump provides a more accurate representation of its performance compared to using a single point.

Creating and Identifying Pump Curves

• After selecting the pump model and relevant parameters, users can save the created curves in a database for future reference, allowing easy access to all registered pump characteristics.

• To visualize the pump, two nodes are used at each end. Once drawn, users must edit the characteristics by inputting data that matches how it was initially registered in the system.

Summary of Key Insights