1 Proposed Revision to Energy Star New Homes Deemed Savings September 19, 2008.
“Energy Free” Stock Watering Systems – Deemed Savings Analysis
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Transcript of “Energy Free” Stock Watering Systems – Deemed Savings Analysis
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“Energy Free” Stock Watering Systems – Deemed Savings
Analysis
September 16, 2003
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“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.
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What Is An “Energy Free” Stock Watering System?
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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
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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
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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
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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