Dairy Barns have significant hot water loads, making solar water heating extremely applealing to dairy industry. Hot water is used to sanitize the milking equipment and wash the milking tanks. In addition, hot water aids i reducing the butterfat residue on the milk handling equipment.
For a dairy farm with a daily hot water load of 230 US gallons or 870 liters per day, and two large draws, Solar Fusion recommends an installation of 12 solar collectors, (3) 120 US Gal/450 liters storage tanks plumbed parallel with the auxilary (existing) water heating system.
Before tax credits, incentives, and grants the installed cost with roof mounted collectors is about $24,000, cost are subject to site conditions, local labour rates, shipping etc. A typical dairy farm will save over $2,500 US a year in energy costs with paybacks in about the 4th year.
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