Calculating Horsepower Requirements and Sizing Irrigation ...

Pumping costs are often one of the largest singleexpenses in irrigated agriculture. Table 1 shows typicalfuel use and costs of pumping in Texas as measured inirrigation pumping plant tests conducted by the TexasAgricultural Extension Service. Properly Sizing pipe -lines for the particular situation will help minimizethese costs. This publication outlines how to calculatethe Horsepower Requirements of Irrigation pumps andhow to use this information in Sizing supply Plant EfficiencyAn Irrigation pumping plant has three major compo-nents: 1. a power unit, 2. a pump drive or gear head, and3. a pump. For electric powered plants, the pump lineshaft andthe motor shaft are usually directly connected, makinga pump drive or gear head overall pumping plant efficiencyis a combination ofthe efficiencies of each separate component. Individualpumping unit components in good condition and care-fully matched to the Requirements of a specific pump-ing situation can have efficiencies similar to those givenin Table 2.

3 Polyvinyl chloride (PVC) or thermoplastic pipe is exactly manufactured by a continuous extruding process which produces a strong seamless pipe that is

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  Requirements, Pipe, Sizing, Calculating, Chloride, Polyvinyl, Horsepower, Polyvinyl chloride, Calculating horsepower requirements and sizing

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