Solar Thermal Heating Systems for South Central Alaska

1. Solar Thermal Heating Systems forSouth Central Alaska Andy Baker, P.E. Independent Clean Energy Consultant YourCleanEnergy LLC

2. Your Clean Energy Finding affordable alternatives to fossil fuels is now one of the great challenges of our times Viable energy projects must meet realistic criteria: We seek out projects that will capture the imagination and interest of clean energy advocates in government, business and the public; projects that can remain sustainable through the expected design life. AFFORDABLE RELIABLE SAFE

3. Overview • Introduction to Solar Thermal Heating • KTUU Film • YCE Solar Project: Seth Down’s Triplex • YCE Solar Project: Ionia Community • YCE Solar Project: Statewide Village Clinic • YCE Solar Project: Gakona Energy Center • Questions + Answers

10. Watt hrs/ sq meter

11. Solar Elevation Angle - Anchorage, Alaska

12. Solar Thermal Heating 2 am Anchorage’s Solar Compass N 5 am 11 pm E W 8 pm 8 am S 11 am 5 pm Solar Noon 2pm

14. FLAT PLATE COLLECTORS WORK IN ANCHORAGE

15. EVACUATED TUBE (or heat pipe) COLLECTOR The best performance for low sun & cold temps Heat loss from tube is only from radiation (@2%)

17. KTUU Film

18. Seth Downs Triplex

20. October 26, 2008

21. Seth Downs Triplex Solar Thermal System 6 x Gobi 406 Solar Thermal Panels Storage Tanks 3 x 80 Gal 50% Prop. Glycol Domestic Hot Water P P Heat Exchanger M Indirect HW Heater and Natural Gas Boiler City Water In

22. Seth Downs Triplex Solar Thermal System Domestic Hot Water P P M City Water In Datalogger Webpage

23. Seth Downs Triplex

24. Seth Downs Triplex

26. November 12, 2008 Seth Downs Triplex, Nov 12, 2008, 1pm

27. December 11, 2008

28. January 4, 2009

29. January 7, 2009

30. February 1, 2009

31. 30yr Net Present Worth = $39,691 Internal Rate of Return = 4.8% Years to Payback = 15 yrs Initial Investment = $14,000 30% Tax Credit = $4,200 Net Initial Investment = $9,800

32. District Heating with Solar at Ionia Community, Kasilof

33. Ionia Community Solar Thermal System 6 x Gobi 410 Solar Thermal Panels 50% Prop. Glycol Garn Wood Boiler 2,000 Gal Domestic Hot Water P P Heat Exchanger Indirect HW Heater 2 x 80 Gal Cold Water In

34. STATE WIDE VILLAGE CLINIC • - For Denali Commission • YCE in association with MCG Architects • - Solar Thermal & PV – 75 deg tilt

35. GAKONA DETACHED ENERGY CENTER • 20% of annual heat load met by solar thermal • 12 arrays of evacuated tube collectors + 4,000 gal storage • 80% of annual heat load met by wood boiler

36. GAKONA DETACHED ENERGY CENTER

39. INCENTIVES FOR SOLAR THERMAL SYSTEMS FEDERAL TAX CREDIT – RESIDENTIAL 30 % Tax Credit , no cap limit Solar water heating property must be certified by SRCC or by comparable entity endorsed by the state in which the system is installed. At least half the energy used to heat the dwelling's water must be from solar.

40. FEDERAL TAX CREDIT – COMMERCIAL 30% Investment Tax Credit – no limit The credit is equal to 30% of expenditures, with no maximum credit. Eligible solar energy property includes equipment that uses solar energy to generate electricity, to heat or cool (or provide hot water for use in) a structure, or to provide solar process heat. IRS FORM 3468

41. SOLAR HOT WATER - 30 YEAR LIFE CYCLE PAYBACK EVALUATION Compared To Current Fossil FuelPayback Propane: 9 years Heating Oil: 10 years Natural Gas: 15 years

42. Alaska Solar Tour • Come and Explore the Solar Projects in your own backyard! • www.alaskasolartour.org • Saturday, May 8th • 10am – 4pm • Visit website for details

43. Questions + Answers • Come and Explore the Solar Projects in your own backyard! • www.alaskasolartour.org • Saturday, May 8th • 10am – 4pm • Visit website for details