Tennessee Valley Zero Energy Homes: Tomorrows Homes, Today

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Tennessee Valley Zero Energy Homes Tomorrows
Homes, Today
Allan M. Gentry Energy Efficient Residential
Construction Program Cleveland State Community
College
This presentation was prepared with the support
of the U.S. Department of Labor (DOL) Grant No.
CB-15212-06-60.
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• Program Overview
• Green Homes
• ZEH Technologies
• Shell Measures
• Geothermal Heat Pumps
• Water Heating Technologies
• Solar Electricity (PV)
• Economics
• Summary

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Reason for Change

• America - 30 of the worlds energy
• Projected to increase 17 from 1995-2015
• Appliances, HVAC water heaters, consume 90
• SOURCE Solar Energy International
  sei_at_solarenergy.org
• Oil Hits 80 a Barrel for First Time
• Tennessee homes - least energy efficient in the
  nation, burning 1,240 kwh/month, far ahead of the
  national average of 850 kwh
• Business Tennessee, Crop Formations, by Alexei
  Smirnov, March 2007

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90
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National Energy Use
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• Tennessee Valley Zero Energy Homes

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Secondary Schools

• 11 High Schools
• 1 TN Technology Ctr.
• 5 county service area
• Programs and Demonstrations
• Recruiting
• Scholarships

Meigs - 1
McMinn - 2
Monroe - 3
Bradley - 3
Polk - 2
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• Existing Construction Technology
• Updated to include
• Renewable Energy
• Energy Efficient Construction
• PV Panel Installation
• Geothermal heat pump
• HERS Rater Training
• Service Learning HFH
• Revising other courses to align
• Construction Techniques
• Standard Building Codes
• Architectural Drawing
• Adding Curriculum
• Alternative Fuels
• Added 17 hr. IT ZEH Certificate

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Solar PV Installation / Utility Inter-tie Web
based data collection and display VAWT
Installation Habitat Energy Star House EERC
Techniques Solar HW Solar PV Powered
pump Dedicated Classroom/Lab Ground Source
HVAC SIP / ICF samples Thermography Mobile
Road Show
Demonstrations
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• Builders
• Contractors
• Suppliers
• Utilities
• Homeowners
• Bankers
• Realtors
• Civic / Non Profits

• Inform
• Educate
• Promote
• Recruit
• Challenge

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II. Green Homes

• Topics
• TVAs energy right
• Energy Star Homes
• EarthCraft House
• LEED for Homes
• Zero Energy Homes

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II. energy right Program

• Program Features
• From TVA and local distributors
• Shell measures are key
• Home Energy Rating System targets
• Incentives and Benefits
• Lower costs and greater comfort
• Distributor incentives
• Energy Efficient Mortgages
• Increased resale value

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II. Energy Star Homes

• Program Features
• Logo has very high recognition.
• Home performance must exceed 2006 International
  Energy Conservation Code by 15.
• Builders option
• Performance Path or
• Prescriptive Path

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II. Energy Star Homes

• Habitat for Humanity - Cleveland

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II. Other Green Building Programs

• EarthCraft House
• LEED for Homes

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II. Zero Energy Homes

• Zero Energy Defined
• Definitions
• At least 50 energy savings
• Near-Zero bills
• Zero net consumption/year

• How accomplished?
• Maximum design efficiency
• On-site energy production

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II. Zero Energy Homes

• Homes for the Future

www.solarhouse.com
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III. ZEH Technologies

• Shell Measures
• Water management
• Wall insulation, windows and shading
• Ductwork placement and sealing
• Sealing throughout!

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III. ZEH Technologies

• Geothermal Heat Pumps
• In-ground tubes collect heat (winter) or disperse
  it (summer)
• Systems return 3-5 times the energy used
  (Coefficient of Performance)
• Loop configurations for most every lot.
• Sized on a per-ton basis

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III. ZEH Technologies

• Water Heating Technologies

• Heat Pump Water Heater
• Desuperheater
• Solar Water Heating

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III. ZEH Technologies
The Solar Window
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III. ZEH Technologies

• Solar Shading

• Degrades solar output
• Avoid the Solar Window
• Consider tree growth

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III. ZEH Technologies

• Solar Hot Water

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III. ZEH Technologies
Drain Back Solar


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III. ZEH Technologies

• Solar Thermal Options

Heliodyne flat plate collector
Sunda 4-tube array
Apricus 22-tube array
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III. ZEH Technologies
Balance of System
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III. ZEH Technologies
Solar PV System
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III. ZEH Technologies
PV Modules
Evergreen Solar
BP Solars Multicrystalline BP SX 170
Shell solar ST5 module, a thinfilm solar array.
Kyocera KC modules come in a variety of
configurations
Sharp mono- and multi-crystalline modules,
including a 45-degree variety.
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III. ZEH Technologies
PV Inverters
Fronius IG inverter
SMA Sunny Boy 1100U
Xantrex GT3.0 EO

• Sharps 3kW inverter

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III. ZEH Technologies

• PV Now Soon

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IV. Zero Energy Homes

• Top 10 Reasons To Think ZEH
• Fits faith values
• Environmental preservation
• Saves money
• Energy security national personal
• Status symbol
• Hobby/ fun
• Enhance visibility/ marketing
• Home improvement
• Utility value adds space, shading, etc.
• Get a good deal utilize incentives

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More Reason for Change

• Off-the-shelf technologies can cut heating,
  cooling, and lighting costs by up to 80
• Replacing one ICB with a CFL means 1000 pounds
  less carbon dioxide and savings of 67 on energy
  costs over the life of the bulb.
• Decrease energy use 1 saving 55 million
  barrels of oil per year. Thats 1 billion!
• SOURCE Solar Energy International
  sei_at_solarenergy.org

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IV. ZEH Economics

• Energy Security
• A ZEH buyer gets
• 25-50 years of heating and cooling
• 25-yrs of electricity
• 15-yrs of hot water
• What will these savings be worth in the future?

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IV. ZEH Economics

• Case Study Cleveland, TN

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IV. ZEH Economics

• Case Study
• Year One

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IV. ZEH Economics

• Case Study
• Year Five

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IV. ZEH Economics

• Case Study
• Year 15

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V. Summary

• Zero Energy Homes make sense
• Economics are here
• Equipment industry are ready
• Customers are coming
• Get Started Now!

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V. YOU can get a credit TOO

• Energy Credit for Home Builders
• Builder Credit of up to 2,000
• For New / Modular home that
• Built and sold before January 1, 2008
• Meets Energy Star (manufactured homes)
• 50 more energy efficient than comparable home
  built to IECC

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Coming Soon

• Alternative Fuels Laboratory
• Produce bio-diesel with used cooking oil
• Eliminate paying for disposal

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Questions