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“Energy Free” Stock Watering Systems – Deemed Savings Analysis

September 16, 2003. “Energy Free” Stock Watering Systems – Deemed Savings Analysis. “Energy Free” Stock Watering Systems. Energy free fountains are closed, “super-insulated containers filled with water.

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“Energy Free” Stock Watering Systems – Deemed Savings Analysis

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  1. September 16, 2003 “Energy Free” Stock Watering Systems – Deemed Savings Analysis

  2. “Energy Free” Stock Watering Systems • Energy free fountains are closed, “super-insulated containers filled with water. • These water heaters rely on the heat from incoming water to keep them ice free during cold weather rather than electric or propane water heating devices • Oregon Trail Electric requested that the RTF review “Energy Free” stock watering systems to assess: • 1) Whether they could qualify for C&RD and • 2) What the potential savings might be from such a systems.

  3. What Is An “Energy Free” Stock Watering System?

  4. Summary of Available Data • Field Study of Electrically Heated and Energy Free Automated Livestock Water Fountains - Prairie Agricultural Machinery Institute, Alberta and Manitoba • From 1990 to 1993 PAMI compared 3 energy free livestock water fountains and 4 electrically heated ones • Energy savings ranged from 440 – 1800 kWh, depending upon the efficiency of the electrically heated unit

  5. Summary of Available Data (cont) • Oregon Trail Electric Metering Study • Metered single electrically heated tank use for most of 2002-03 winter • Full season use for tank was approximately 1,134 kWh/yr • If “Energy Free” heater eliminates electric resistance heating, savings would be 1,134 kWh/yr • Average savings from PAMI research = 1,127 kWh/yr

  6. Summary of Available Data (cont) • Three manufacturers • Incremental Cost = $350 to 450 /tank depending on tank size and location. (New installations can also avoid wiring costs) • “Professional judgement” = average measure life = 7 yrs • Used “Residential Space Heating” Load Shape

  7. Results of Deemed Savings Calculation • Current data restrict application to heating climate zones 2 & 3 • Option – reduce savings to reflect milder winters in heating climate zone 1 and provide zone specific savings & credits • C&R Discount Credit = $172 • Still need “product specification” prior to establishing deemed value => • “We unconditionally warrant that our two-hole hog drinker, Model WPM10, has more freeze resistance than any other two-hole hog waterer on the market” – Polar Max Energy Free Waterers

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