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- 1. Certified Energy Manager LEED AP BD+C davidgibson1@gmail.com Powered by Sunshine: Net-Zero Energy Homes as a step toward 100% Renewable Energy David Gibson 1 UNR Renewable Energy Minor October 18, 2016
- 2. 2 UNR Renewable Energy Minor April 6, 2016
- 6. Blower Door 6 • Used to measure air leakage before and after sealing • Precisely calibrated • For every cubic foot pulled out through the BD, one cubic foot is leaking in • Helps identify air leak locations and magnitude
- 13. Economic Analysis To determine which improvements should be made, we compare the upfront cost to the savings over time: • Simple Payback – How long does it take the measure to pay for itself? Calculation: upfront cost / annual savings • Return on Investment (ROI) – Can be compared to other investments (stocks, bonds, mutual funds, etc). Calculation: annual savings / upfront cost UNR Renewable Energy Minor October 18, 2016
- 14. Actual Energy and Cost Savings System Before Improvements Projected Costs Actual Costs Actual Savings Percent Savings Heating $4,022 $2,686 $850 $3,172 79% Cooling $0 $0 $0 $0 --- Water Heating $549 $549 $385 $164 30% Lights and Appliances $1,138 $968 $950 $188 17% Service Charges $115 $115 $115 $0 0% Total $5,824 $4,318 $2,300 $3,524 61%
- 17. Economic Analysis (LED Lights) Would you give me $100 today, if I offered to pay you $10/month for the next ten years? UNR Renewable Energy Minor October 18, 2016
- 18. Economic Analysis (LED Lights) Would you give me $100 today, if I offered to pay you $10/month for the next ten years? $120/year x 10 = $1,200 Payback: $100/$120 = 0.833 years (10 months) ROI: $120/$100 = 120% UNR Renewable Energy Minor October 18, 2016
- 19. Low-Flow Showerhead • Old (standard): 2.5 gallon per minute (GPM) • New: 1.5 GPM • Savings: 1.0 Gallon per Minute • 30 min showering = 30 gallons per day • 365 days = 10,950 gallons per year $100/year savings for electricity and water (~$60/year savings for natural gas) UNR Renewable Energy Minor October 18, 2016
- 22. UNR Renewable Energy Minor April 6, 2016
- 23. A Great Investment • Investing in home efficiency is one of the best investments you can make • Significantly reduces long-term energy costs • Guaranteed return on investment, often exceeding 10% • Makes you more comfortable while saving you money UNR Renewable Energy Minor October 18, 2016
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- 25. Economic Analysis • Efficiency improvements: – $7,000 cost – $3,500 annual savings – 2 year payback / 50% Return on Investment • Solar hot water: – $6,700 cost - $2,500 rebate = $4,200 out of pocket – $420 annual savings – 10 year payback / 10% Return on Investment • Home value increased by $52,000 in 2 years! – At least half attributed to energy improvements 25 UNR Renewable Energy Minor October 18, 2016
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- 28. Net-Zero Energy • The final step to making my house Net-Zero Energy is to replace the oil furnace. • Will have a ground-source heat pump installed. • Exchanges heat with the ground to provide heating and air conditioning. • Cost: $33,000 • Federal Tax Credit: 30% UNR Renewable Energy Minor October 18, 2016
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- 31. Economic Analysis UNR Renewable Energy Minor April 6, 2016
- 32. 32 • 2011 Toyota Prius • 50 MPG • 2013 Nissan Leaf • 120 MPGe • 100% Electric • Powered by Sunlight
- 33. 33 Nevada Energy Consumption & Costs
- 34. Economic Development Nevada spends $8 Billion each year on imported fossil fuels. (natural gas, coal, oil) • By 2030, we could have 100% renewable electricity, and 50% reduction in oil imports • By 2040, we could have 100% renewable energy across all sectors • Retaining $7 billion would create 100,000+ jobs UNR Renewable Energy Minor October 18, 2016
- 35. Residential • Nevada homes spend ~$1.5 Billion out-of- state each year on fossil fuels • 500,000+ homes in Nevada need efficiency upgrades x $7,500 = $3.75 billion impact • 500,000+ homes could install renewable energy upgrades x $20,000 = $10 billion impact • Auditors, HVAC, electrical, plumbing, insulation workers, solar installers needed UNR Renewable Energy Minor October 18, 2016
- 36. Commercial / Industrial • Nevada businesses spend $2.0 Billion out- of-state each year on fossil fuels • Deep efficiency improvements = 30%+ savings • Rooftop solar • GSHP under parking lots • Solar shade over parking lots UNR Renewable Energy Minor October 18, 2016
- 37. Transportation • Nevada spends over $5 billion annually on imported oil and transportation fuels. • How can we transform the Transportation sector? • Improve Bike-ability • Electric Vehicles • Light Rail • High-Speed Rail or MagLev Trains UNR Renewable Energy Minor October 18, 2016
- 38. Energy/Water Nexus • Efficiency and renewables reduce water waste • Covering half of Lake Mead in solar would: • Reduce evaporation equal to Nevada’s water allocation from the Colorado River • Produce more electricity than all of NV Energy’s fleet of gas and coal plants UNR Renewable Energy Minor October 18, 2016
- 39. Next Steps • NSHE Endowment: Divest from Fossil Fuels • 2017 Legislature: o Set Statewide Goal (100% renewables by 2040) o Green Bank to finance projects o PERS: Divest/reinvest ~$2-$3 Billion UNR Renewable Energy Minor October 18, 2016
- 40. What can you do? • Change your lightbulbs to LEDs and install a high efficiency (1.5 GPM) showerhead today! • Hire a certified energy auditor to see what other improvements you can make • Talk with UNR about how they can save energy • Contact your elected officials to let them know that this is the future you want for Nevada! UNR Renewable Energy Minor October 18, 2016
- 41. Certified Energy Manager LEED AP BD+C davidgibson1@gmail.com Powered by Sunshine: Net-Zero Energy Homes as a step toward 100% Renewable Energy David Gibson 41 UNR Renewable Energy Minor October 18, 2016
Editor's Notes
- This is my projected energy bill ($0) for the month. This includes all home lighting and appliances, hot water, heating, and even my electric car!
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- Every load of laundry you run in the dryer costs $0.50 - $1.00 for electricity. Hanging it out on the line is free. It costs ~$10 for 100 feet of clothesline, so this pays for itself within 10-15 loads. How much laundry does your household do in a month?
- With the efficiency savings from the first two years, I have installed solar hot water. These provide all the hot water for 6 occupants nearly every day. I only have to turn on the electricity to the water heater for backup when we have extended cloudy weather. Best of all, these solar collectors were manufactured 5 miles from here, by Sunvelope Solar in Sparks. I’ve visited their production facility, and its truly impressive. This is the most cutting edge technology in the world; they have the first panels that water can freeze inside of, allowing their system to draw cold water directly out of the hot water tank and deposit the hot water back at the top. No secondary loop, no heat exchanger, no glycol.
- This summer I built a trellis in my backyard.
- We had solar installed by a local contractor.
- The earth maintains a stable temperature year-round once you get 6-10 feet underground. In Reno, the ground temperature maintains ~55 degrees at this depth. The ground-source heat pump exchanges heat with the earth. To install it, they dug ~250 feet of trenches in the yard, with each trench 6 feet deep x 3 feet wide. A coil of ~2,500 feet of plastic piping was laid in the trench, and will exchange heat with the earth.
- Due to all the efficiency improvements, we were able to replace the 105,000 BTU/Hour furnace with a heat pump that provides less than 1/3 the heat output, only 31,000 BTU/hour. Most heating and air conditioning systems are significantly oversized, in part because the home is very inefficient.
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- The Toyota Prius is generally seen as one of the most efficient cars available. However, the Nissan Leaf gets more than twice the distance per unit of energy, so it is more than twice as efficient. The Leaf is also powered by electricity, which can be generated from renewable energy sources, like solar or geothermal.
- The transportation sector makes up about 1/3 of the energy consumption in Nevada, but represents more than half of the energy costs!
- With your help, Nevada can lead the nation to a prosperous clean energy future, powered by sunshine!