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Energy Use Index (EUI) Anchorage Fairbanks Average Home: 141 - PowerPoint PPT Presentation

May 18, 2023 •18 likes •608 views

Fairbanks: Net Zero Ready Bruno Grunau, P.E. Chief Programs Officer and Research Engineer, Cold Climate Housing Research Center bruno@cchrc.org Energy Use Index (EUI) Anchorage Fairbanks Average Home: 141 Average Home: 143 5 star Home: 79 5

  1. Fairbanks: Net Zero Ready Bruno Grunau, P.E. Chief Programs Officer and Research Engineer, Cold Climate Housing Research Center bruno@cchrc.org

  2. Energy Use Index (EUI) Anchorage Fairbanks Average Home: 141 Average Home: 143 5 star Home: 79 5 star Home: 90 6 star Home: 40 6 star Home: 43 kBtu/J 2 /year kBtu/J 2 /year www.wikimedia.org

  3. Net Zero Ready – HERS RaSng Anchorage Average Home: 141 5 star Home: 79 6 star Home: 40 kBtu/J 2 /year Home Energy RaSng System www.wikimedia.org

  4. Annual Energy Cost Anchorage Fairbanks Average Home: $2,900 Average Home: $8,100 5 star Home: $1,600 5 star Home: $3,865 6 star Home: $800 6 star Home: $1,861 1,900 J 2 1,900 J 2 www.wikimedia.org

  5. Fuel Types & Costs Anchorage Fairbanks Electricity ($/kwh) $0.18 Electricity ($/kwh) $0.24 Natural Gas ($/ccf) $0.87 Natural Gas ($/ccf) $2.04 Oil ($/gal) $2.61 Oil ($/gal) $2.66 Propane ($/gal) $3.47 Propane ($/gal) $4.25 Coal ($/ton) $175 Coal ($/ton) $250 Spruce ($/cord) $345 Spruce ($/cord) $250 Birch ($/cord) $325 Birch ($/cord) $350 Pellets ($/ton) $280 Pellets ($/ton) $295 www.wikimedia.org

  6. Fuel Types & Costs Normalized Anchorage ($/kWh) Fairbanks ($/kWh) Natural Gas $0.03 Pellets $0.07 Coal $0.05 Coal $0.07 Pellets $0.07 Natural Gas $0.07 Oil $0.08 Oil $0.08 Birch $0.09 Spruce $0.09 Spruce $0.13 Birch $0.10 Propane $0.14 Propane $0.18 Electricity $0.18 Electricity $0.24 www.wikimedia.org

  8. 2.5% 13.5% 34% 34% 16%

  10. Photovoltaic vs. Solar Thermal FAI: 5 – 15 yr Payback FAI: 3.5 – 7 yr Payback ANC: 7– 20 yr Payback ANC: 10 – 25 yr Payback

  11. Domestic Hot Water Loads Fairbanks, 3 collectors Domestic Hot Water: 80 gal/day 50 45 40 ) l i 35 O f o 30 s Heating Load n o l l 25 a 49 degree tilt G ( 20 y g 85 degree tilt r e 15 n E 10 5 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Base Heat Load: 152 gal/yr Solar Savings: 115 gal/yr (49 degrees) 75% 106 gal/yr (85 degrees)

  12. Space Heating Loads Average House in Fairbanks, 10 collectors 300 250 ) l i O 200 f o s Heating Load n o l l 150 a 49 degree tilt G ( y g 85 degree tilt r 100 e n E 50 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Base Heat Load: 1,400 gal/yr Solar Savings: 462 gal/yr (49 degrees) 33% 413 gal/yr (85 degrees)

  13. Space Heating Loads 6-Star House in Fairbanks, 10 collectors 300 250 ) l i O 200 f o s Heating Load n o l l 150 a 49 degree tilt G ( y g 85 degree tilt r 100 e n E 50 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Base Heat Load: 442 gal/yr Solar Savings: 294 gal/yr (49 degrees) 67% 291 gal/yr (85 degrees) 66%

  14. Space Heating Loads 6-Star House in Fairbanks 300 250 ) l i O 200 f o s Heating Load n o l l 150 a 49 degree tilt G ( y g 85 degree tilt r 100 e n E 50 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Seasonal Thermal Storage Base Heat Load: 442 gal/yr Solar Savings: 385 gal/yr (49 degrees) 87% 372 gal/yr (85 degrees)

  15. Perspective

  16. Basic Info • Work at CCHRC • Ordinary Guy • South facing lot • Goal was $250,000

  17. Basic Info • InsulaLon – Walls: R-60 – Floor: R-70 – Ceiling: R-115 • AirLghtness: 0.45 ACH 50 • Solar Thermal & Masonry Heater • Seasonal Thermal Storage • Energy Design Aspects Influenced by Thorsten Chlupp • Cost: $268k

  18. Land Clearing – Facing South

  19. Subterranean Storage

  20. Seasonal Thermal Storage

  32. ADN Ar&cle (Oct 2015)

  33. ADN Ar&cle (Oct 2015)

  34. ADN Ar&cle (Oct 2015)

  35. InsulaLon • 42 MMBtu/yr savings over R-19 Wall (323 gallons oil) R-Value MMBTU/Yr 117 38 76 41.3 73 41.7 65 43 51 46 35.7 51.8 28.2 56.8 19 80.2

  36. How Much InsulaLon? 90 80 70 Net heat Load (MMBtu/yr) 60 R-Value MMBTU/Yr 117 38 50 76 41.3 40 73 41.7 65 43 30 51 46 35.7 51.8 20 28.2 56.8 10 19 80.2 0 15 35 55 75 95 115 R-Value of Wall InsulaSon

  37. Triple Pane Windows • 10 MMBtu/yr savings over Double Pane (77 gallons oil)

  38. Air Sealing • 3 ACH 50 0.45 ACH 50 • 18 MMBtu/yr savings (138 gallons oil)

  39. Roof InsulaLon • 12 inches 30 inches • 4 MMBtu/yr savings (30 gallons oil)

  40. Heat Recovery • Savings: 20 MMBtu/yr (153 gallons oil)

  41. Energy Modeling: AkWarm • 6 Star, 98 points • Net Heat Load: 34 MMBtu (246 gal oil) • Solar Offset: 21 MMBtu (152 gal oil) • Wood Offset: 13 MMBtu (under 1 cord)

  42. Seasonal Thermal Storage

  44. November 2014 Sun Mon Tue Wed Thu Fri Sat 2 3 4 5 6 7 8 25# 28# 21# 25# 115°F 108°F 113°F 116°F 9 10 11 12 13 14 15 30# 25# 31# 118°F 120°F 116°F 16 17 18 19 20 21 22 35# 38# 108°F 105°F 23 24 25 26 27 28 29 35# 25# 21# 113°F 119°F 123°F 30 1 2 3 4 5 6 37# 30# 109°F 104°F

  45. Modeled Vs Actual • 6 Star, 98 points • Net Heat Load: 34 MMBtu (246 gal oil) • Solar Offset: 21 MMBtu (152 gal oil) • Wood Offset: 13 MMBtu (under 1 cord) • Wood Burned: • 2013-2014: 0.75 Cords • 2014-2015: 1 Cord • 2015-2016: 1 Cord • 2016-2017: 1.5 Cords

  48. Gedng to Net Zero • Yearly Average: 4,400 kwh 600 500 400 KWH/Mo 300 200 100 0 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 • Solar PV: 4,500 Wahs

  55. Anchorage: Fairbanks: COP = 5 COP = 4 $0.036/kWh $0.06/kWh Anchorage ($/kWh) Fairbanks ($/kWh) Natural Gas $0.03 Pellets $0.07 Coal $0.05 Coal $0.07 Pellets $0.07 Natural Gas $0.07 Oil $0.08 Oil $0.08 Birch $0.09 Spruce $0.09 Spruce $0.13 Birch $0.10 Propane $0.14 Propane $0.18 Electricity $0.18 Electricity $0.24

  58. Thoughts • Like having a dog team – Make a Manual • More Coils in Fire Box! • Financing Obstacles • Equivalent Oil Use: 250 gal • Once tank is depleted, dump heat to floors • Air Source Heat Pump • Good example – Building envelope influence – Energy system influence • Net Zero • PV vs Solar Thermal

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