|New UNL worksheet evaluates irrigation efficiency|
University of Nebraska-Lincoln engineers have developed an online spreadsheet to help irrigators evaluate their pumping plant efficiency, said a UNL irrigation specialist at a recent extension workshop.
Using this new tool, developed by Tom Dorn, Lancaster County Extension Educator, irrigators can calculate the amount of money they could save by improving the efficiency of their system, said Bill Kranz, irrigation specialist at the UNL’s Haskell Agricultural Laboratory.
The first step is to determine whether a pumping plant uses more energy than the Nebraska pumping plant performance criteria suggests it should. That’s done by entering data from irrigation records into the UNL online spreadsheet.
Irrigators will be asked to select the energy type and enter the price per unit of energy, water meter readings, the pumping water level, the pressure at the discharge head and total energy used during the test period.
Instructions will help users navigate the spreadsheet to determine their own plant’s efficiency and the amount of money they could save if the pumping plant were operating up to Nebraska performance standards.
With that information, irrigators can calculate how much they can afford to spend, based upon the interest rate available.
When considering inefficiencies in the system, irrigators should look at the whole system, including the pump, gearhead, PTO shaft and power unit, Kranz said. Inadequacies in any part of that system can increase energy use.
While it’s costly to pull a pump, sometimes the cost of unneeded energy is quite high too, Kranz said.
The spreadsheet is available at lancaster.unl.edu/ag/crops/Long_Term_Pump.xls. Those who do not have Internet access should contact their local extension office to get in touch with one of UNL’s agricultural or biological systems engineers across the state.
In the 20 counties of the West Central District, Water Resources/Irrigation Engineer Simon van Donk will help irrigators make these calculations.
Van Donk can be reached at 308-696-6709.