Broyhill Wind Project 4 March 2008 Presentation

1. Broyhill Wind Project 4 March 2008 Presentation

2. Topics to cover • REI background • Broyhill Wind Project • Visual analysis • Photo simulation • Shadow analysis • Sound analysis • Other topics • Discussion

3. Renewable Energy Initiative Mission Statement Reduce the environmental impact of Appalachian State University by replacing the university’s existing sources of energy with cleaner forms of renewable energy technology on campus and serve as a resource for students and faculty by identifying and investing in the most appropriate renewable energy projects.

4. Last Year’s Vote on the REI Fee • Student referendum for additional fee of $5/student/semester • 1,352 votes • more than the presidential issue (1070) • 93% of voters (1258) voted yes! • Compared with 2004 vote • 500 more votes this year • 82% mandate in 2004

5. Completed REI projects • Biodiesel Collaborative Solar Thermal • ASU & AppalCART Biodiesel Tank • Biodiesel Collaborative Photovoltaic Array

6. Current REI projects • Raley Hall Photovoltaic Array • Plemmons Student Union Solar Thermal System • Plemmons Kiosk • Education Building Solar • No examples of wind energy

7. Broyhill is the windiest place at ASU Wind Power density map Annual Average wind speed map

8. Other benefits Broyhill site • School property • Close to infrastructure • Short run to utility interconnect • No additional roads needed • Showcase ASU • Environmental leader • Student activity • Serves as an attraction

9. Where • Next to water tank • Highest place has the best wind • Extend water tank fence • Well within ASU property • Satisfies setbacks • ASU regulations not Boone or Watauga

10. Site dimensions

12. Size of proposed REI Wind Turbine • Dictated by annual budget: $135,000 • Can afford about 100kW • Diameter of 20m (66ft) • Tower height of 35m (115ft) • Total height of 45m (148ft) • Monopole, 3-blade, upwind  modern • Modeled as Vestas V-20 on 35m tower • Annual output of 150,000 to 200,000kWh, enough for 10 to 15 homes

14. Photo Simulations • WindPRO, actual photos • snowy March 1st • sunny March 2nd • ArcGIS, actual data, CG world • wind turbine = 45m • trees = 60ft • The BroyhillInn & Conference Center = 40ft • water tank = 30ft • other building = 20ft, regardless of their actual height

17. Bodenheimer Dr.

19. Broyhill dining room

25. Animations in ArcGIS

26. What will it sound like? • Same noise level as a “quiet office” • Rear carport • Outside dining room window • Will not be above ambient sound levels • loading dock • Upper dining room patio

27. Sound Analysis • Decibel chart • Ambient sound measurements on: • March 2nd, windy day • March 3rd, calm day with birds chirping • WindPRO analysis

28. Ambient noise level Pink dB from 1st March, windy day –see right Blue dB from 2nd March, calm day

29. Ambient Noise Results WindPRO calculations on noise level and distances from turbine

30. Shadow Analysis Astronomical worst case • Always sunny, and therefore always a shadow • Always windy, so the blades are moving This way not this • Always blowing inline with the turbine and the observer; making the blades perpendicular to the observer, and giving the largest possible shadow area

31. Rear carport

32. Dining room window

33. Dining room shadow • An awning • Need to shade when sun is at first shadow on winter solstice –the worst case • Azimuth of 167 • Elevation of 29 • Broyhill faces 86 • Apply trigonometry • 5.5ft overhang provides full shading for 10ft tall window

34. Chancellor’s house

35. Other items • Radio • No. Asynchronous, brushless motors do not cause the same RF interference • Turbines as antenna towers • Construction • Relatively small crane • Birds • Typically not an issue • Monopole does not allow for roosting • Broyhill not a known migratory path for endangered birds

36. Animations in ArcGIS

37. Questions&Discussion

38. Thank you

41. Output

42. Comparison of output