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Published byJenifer Ashfield Modified over 10 years ago
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Towers at Bergey Windpower SMART Wind Consortium Support Structures Subgroup Meeting January 14, 2015 Mike Bergey President & CEO 160 ft. Guyed-Lattice Install for Bergey 10 kW by Niagara Windpower, Upstate New York, 2014
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Bergey Windpower Co. Bergey Windpower Co. A World Leader in Small Wind Established in 1977, sole focus on small wind turbines for distributed applications Pioneered “sophisticated simplicity” turbine architecture and numerous component technologies Turbines have 3-4 moving parts, require no scheduled maintenance, and have demonstrated 20+ years with 100% availability and zero O&M costs – unique in industry Longest warranties in industry Over ~10,000 installations, covering all 50 States and over 100 countries
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Bergey Products 1 kW 8.2 ft Dia. 10 kW 23 ft. Dia. 6 kW 20.2 ft Dia. Custom Inverters & battery chargers Towers: Multiple styles, 60 – 160 ft.
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In-House Manufacturing
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Residential Montana Health Clinic Afghanistan Cell site Kenya Military Atlantic Ocean
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Grid-Intertie Markets
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Towers for Small Turbines Putting a Wind Turbine on a Tower That is Too Short is Like Mounting a Solar Module in the Shade Towers Should be 18 m (60 ft) Minimum Towers of 24-37 m (80-120 ft) Recommended Taller Towers Cost More, But Nearly Always Lower Life-Cycle Costs Due to Performance Improvement Hot-Dip Galvanized Steel is the Most Common Tower Material Effective Tower Grounding is an Important Part of Lightning Protection
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Guyed-Lattice Towers Least Expensive Type... Efficient Use of Materials Good Siting Flexibility Easily Erected with Gin- Pole on Smaller Systems (>10 kW) Periodic Monitoring of Guy-Wire Tension Required Simple, Inexpensive Civil Works... Minimal Concrete Requirements
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Tilt-up Towers Cost is ~30% More Than Non-Tilting Tower Easy to Erect Without a Crane Must have 4-Way Guying Raising With Hand Winch Possible Good Choice for Typhoon Affected Areas
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Self-Supporting Towers System Cost is ~15-30% More Than Guyed-Lattice Tower Requires Substantial Civil Works Smallest “Foot-Print” Must be Heavy Duty to Provide Proper Stiffness Growing popularity in active markets with robust subsidies
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~ 1 kW Guyed Tubular Tower
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Guyed-Lattice Towers for 10 kW
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10 ft. GL Tower Sections
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“Guasti 6-Pack”
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BWC Tower Experience & Trends Sales trend towards self-supporting towers Tower heights creeping up: 140’ for 10 kW now common Resonance/dynamics issues have caused noise but not failures Good, but not perfect, success with customer supplied towers (using published requirements) No personal injury claims to date Path to lower tower production cost is understood – just need volume Anchoring is a market barrier – cost, time, hassle – better solutions needed
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