Pumps_S09 - BRAE 340 - Irrigation Water Management Pumps...

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BRAE 340 - Irrigation Water Management Pumps Name: Date: BRAE 340 Laboratory: Section #: ________ Names of Others in Your Discussion Group: ______________________________________ ______________________________________ ______________________________________ ______________________________________ ______________________________________ ______________________________________ BRAE 340 Irrigation Water Management 1 Lab: Pumps 2009
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BRAE 340 - Irrigation Water Management Pumps Introduction : The goal of this lab is to conduct an evaluation of the pumping plant efficiency under field conditions, and to consider the consequences of different pump performance characteristics. The amount of energy that goes into the water being pumped depends on the pump flow rate and pumping head (total dynamic head). The amount of energy being used by the pump electric motor can be determined from the electric meter. Efficiency is the ratio of the output horsepower to input horsepower. [*** Note: Pumping efficiency has to do with the effective use of energy in the pumping system. It is not related to irrigation efficiency, which has to do with the effective use of water from the irrigation system.] Field Work : Record your data as collected on the Data Collection forms provided. The items highlighted in bold are items that need to be determined in the field. The other items can be calculated later in the lab. Take data for at least 8 to 10 flow rate conditions. Data Analysis : Determine the pumping plant efficiency for each flow rate. Use the efficiencies provided by the instructor for the motor and other components of the pumping plant, and estimate the efficiency of the pump itself for each flow rate. (The formulas you need to do the calculations are given below, and on the next page.) Graph of Pump Curve: Plot your data on a graph with two curves. The horizontal axis should be labeled “Flow Rate - GPM.”
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Pumps_S09 - BRAE 340 - Irrigation Water Management Pumps...

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