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Water System Energy Savings

Water System Energy Savings. Don Day Extension Associate – Energy December 2012. Outline. Management Changes Scheduling Timing Mechanical Changes Checking System Energy Source Fuel Cost Comparisons Other farm water use. Irrigation Energy Savings. Water only when needed.

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Water System Energy Savings

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  1. Water System Energy Savings Don Day Extension Associate – Energy December 2012

  2. Outline • Management Changes • Scheduling • Timing • Mechanical Changes • Checking System • Energy Source • Fuel Cost Comparisons • Other farm water use

  3. Irrigation Energy Savings • Water only when needed.

  4. Scheduling Methods • Woodruff Method – or checkbook method • http://agebb.missouri.edu/irrigate/woodruff/ • Weather data • Recording field information: Sensors • Soil moisture blocks • Tensiometers

  5. Crop Water Use from Weather Data

  6. MU Weather Stations • http://agebb.missouri.edu/weather/stations/index.htm

  7. Soil Water by Hand Feel Method Fine sandy loam 25-50% AW Fine sandy loam 50-75% AW Fine sandy loam 75-100%

  8. WATERMARK SOIL WATER SENSOR Granular Matrix Block PVC Pipe ½” SDR 13.5 (Working Pressure 315 psi) I.D. = 0.716” CPVC Pipe ¾” Copper Tube Size (WP 100 psi) I.D. = 0.715”

  9. Sensor Installation Depths Insertion Hole 12” 6” 16” Chisel Slot Soil Depth Intervals 12” 18” 12” 30” 42” 12”

  10. Data Logger Hansen AM400 Datalogger - 6 Soil water sensors and two soil temperature sensors - Provides in field graph of past 35 days - More difficult to wire sensors into data logger - Special cable needed to download data

  11. Easy Access

  12. Irrigation Testing • Uniformity testing • Takes about 4 hours • Should be done every 3-5 years • Pump/well testing • http://farmenergymedia.extension.org/video/irrigation-pumping-plant-efficiency • http://edis.ifas.ufl.edu/ae122 • http://www.bae.ncsu.edu/programs/extension/evans/ag452-6.html • http://itc.tamu.edu/documents/l885.pdf

  13. Maintenance • Leaks • Reduce pressure • Affect uniformity • Nozzles • Each worn nozzle can cost $4/yr. in energy cost • Power Units • Proper maintenance • Keep weeds mowed for ventilation • Pumps • Worn impellers • Seals • Intakes: lower water levels may require adjustment of pumps due to water level.

  14. Pump with Normal Seal

  15. Pump with Worn Seal Internal leakage Worn seal Some water is re-pumped and re-pressurized

  16. Worn Impellers Open Impeller Enclosed Impeller North Central Region SARE Grant, 2011

  17. Impeller Adjustment is Key Bottom Seal re-established, improving output and efficiency (may increase per hour energy use)

  18. Irrigation Energy Assessments • NRCS: • http://www.ruralenergy.wisc.edu/conservation/irrigation/default_irrigation.aspx

  19. Decreasing Irrigation Energy

  20. Fuel Cost Comparisons • http://agebb.missouri.edu/irrigate/tips/index.htm

  21. Additional Resources • http://www.extension.org/pages/27775/introduction-to-energy-efficient-irrigation

  22. Financial Assistance • EQIP – USDA NRCS • http://www.mo.nrcs.usda.gov/programs/eqip/eqip.html • REAP –USDA Rural Development • http://www.rurdev.usda.gov/MO-REAP.html

  23. Loans and Cost Share Might be Used For: • Converting to low pressure • Change of nozzles • Updating power equipment • Converting type of fuel • Sensors

  24. Livestock Watering Systems • http://www.extension.org/pages/32596/livestock-watering-systems-energy-efficiency-checklist-and-tips • http://extension.missouri.edu/p/EQ380

  25. Livestock Waterers • MAESTRO example • Heating elements ran 24 hours/day for 75 days. (600 hrs. run time) • One 500 watt, three 250 watt • Used 2250 kWh at cost of $270 • Cost of energy free waterers, $1650 • Payback = 5.7 years

  26. Livestock Waterers • Thermostat settings • Check for leaks • Insulate waterer

  27. Pump Houses • MAESTRO Example: • Uninsulated pump house: • 790 kWh electric use at cost of $95/year • Add insulation • Reduce to 272 kWh at cost of $33 • Cost of insulation = $230 • Annual savings = $62 • Payback = 3.7 years

  28. Pump Houses • Seal air leaks • Add insulation • Use thermostats to control heat

  29. Files on the Jump Drive • This presentation: Water System Energy Saving Don Day.pptx • Bioenergy and Sustainable Energy Series • Encon-2.4-11-30-2012.pdf • Encon-2.4-Irrigation Self-Test.docx

  30. Files on Jump Drive • ATTRA publications: • Energytips_irrig.pdf • Irrigation-water.pdf • Maintaining_pumps.pdf • Soil_moisture.pdf

  31. Files on Jump Drive • PowerPoints • Energy Conservation with pipeline design • Irrigation Management Tools for Energy Conservation_2011 • Reducting_Pumping_Energy_Costs12011_final • Handouts: • Irrigation Pumping Costs Handout_2011 • Evaluating Pumping Plant Efficiency, K-State • Updating the Nebraska Pumping Plant Performance Criteria

  32. Files on Jump Drive • Joe Henggler files: • Options to Decrease Irrigation Cost • Expanded Options to Decrease Energy Cost in Irrigation • Fuel Cost Comparisons (Excel File also on AgEbb)

  33. Questions Don Day Extension Associate – Energy daydr@missouri.edu 573-823-1570

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