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

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. AFFORDABLERELIABLESAFE

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

Watt hrs/ sq meter

Solar Elevation Angle - Anchorage, Alaska

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

FLAT PLATE COLLECTORS WORK IN ANCHORAGE

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

KTUU Film

Seth Downs Triplex

October 26, 2008

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

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

Seth Downs Triplex

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

December 11, 2008

January 4, 2009

January 7, 2009

February 1, 2009

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

District Heating with Solar at Ionia Community, Kasilof

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

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

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

GAKONA DETACHED ENERGY CENTER

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.

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

SOLAR HOT WATER - 30 YEAR LIFE CYCLE PAYBACK EVALUATION Compared ToCurrent Fossil Fuel Payback Propane: 9 years Heating Oil: 10 years Natural Gas:15 years

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

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