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GA UFC 2012

October 25, 2012 LaGrange GA, USA

Dan Staley

on 3 May 2013

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Transcript of GA UFC 2012

Please Find Your On-Line Handout at: http://danstaley.net/GUFC-hand.pdf The Harmonious Co-existence of Trees and Solar Panels Dan Staley
DCS Consulting Services
http://danstaley.net October 25, 2012 Understand the basics of solar power collection and solar access zones at project and site levels.
Understand detailed site considerations of the solar industry and how to adapt site considerations to energy needs.
Learn ideas, design and policy advocacy strategies to ensure vegetation does not conflict with rooftop solar power collection.
These are new, cutting-edge ideas and solutions Today's Objectives Background Urban Forest
Benefits Economic Benefits of Urban Forests Conserve energy by shading building envelopes and
ameliorating the urban heat island.
Avoid stormwater costs by intercepting and slowing precipitation.
Improve human productivity: greenery for psychological restoration.
Increase residential and commercial property values
and improve business performance in well-landscaped areas. Economic Benefits of Urban Forests Social Benefits of Urban Forests Social Benefits of Urban Forests Urban forests improve overall quality of life:
appear to speed human healing,
provide restoration from stress and urban conflict,
"nearby nature", "view from your window"
are a component in increasing physical activity, Provide positive environments for children,
slow traffic improving roadway safety,
MAY reduce crime in well-treed neighborhoods and
signal desirable areas. Customers travel farther
Spend more
Valuation higher Solar Access Solutions Hedonic/amenity value raises valuation
One large tree = ~2-5% Multiplier
Spillover to adjacent properties Rents increase
Commercial sales increase
Farther trips
Higher lease values Tree Planting Initiatives as a Reaction to
Canopy Loss Why Solar Power? Permitting, engineering
and efficiency Solar Collection Production Costs Installations Globally Aging Electrical Grid Aging Electrical Grid Aging Electrical Grid Increasing Weather Impacts What Do the Solar Folks DO Anyway? Energy security and
independence Common Solar Collector Types Photovoltaic (PV) Solar Hot Water Concentrated Solar Power (CSP) ~200-250 Watts Rooftop Ground-mounted Sunlight creates electron movement Sunlight heats water (a.k.a. "Solar Thermal") Sunlight reflected to create heat Recap Urban forest benefits outweigh costs
Quality of life
Property values
Tree planting programs to offset loss
Solar power costs plummeting, installations increasing
Common types of collection Typical home = ~4KW What Do We Mean by 'Solar Access'? "Right to Light" or "Ancient Lights" For thousands of years, societies have protected the right to heat and light from the sun Ancient Greeks
Spanish "Laws of the Indies"
British Common Law U.S. and Canada do not have legal doctrine of Right to Light from British Common Law U.S.: Circuit Court decisions in 1950s "Right to Light" or "Ancient Lights" Lack of Legal Right to Light: Hodgepodge of local laws that may or may not
be transferable to other places No standard guidance for policy or individuals Mistakes take a long time to become apparent and fix Visualizing Solar Access Planes (or Zones) Visualizing Solar Access Planes (or Zones) Perspective - Solar: Look Out Contested Space & Property Rights Battles d h Solar Path Diagram Solar access plane as "wedge" 10-2 9-3 3-D on Sky Dome Solargraph: pinhole camera Solar Site Analysis Solar Site Analysis Analysis Products Remote Solar Site Analysis Preserving Benefits - Now What? Tree Placement: Optimal
Energy Efficiency Tree Shadows in Winter
Limit Solar Gain for Heating Strategies at Scale Me? Write Policy?! Strategies at Scale Strategies at Scale Strategies at Scale Information, guidelines, Covenants, voluntary agreements, easements,
ordinances, reference material... Parcel-scale Neighborhood-scale Guidelines, Covenants, easements, ordinances, reference material... Neighborhood-scale Design Guidelines, Covenants, easements, ordinances, reference material... One-story Two-story Avoid Infrastructure Damage & Foster Good Tree Health Strategies at Scale Neighborhood-scale Recap Solar access is both:
A legal definition
A physical, fixed, measurable space
The sun has a predictable path
Solar site analysis looks at:
The site
Obstructions nearby
Output products can be analog or digital
No guarantee a roof can generate power Summary Relevant urban forest benefits: Increased property values
Higher quality of life
Improved retail performance
Building conditioning
Lower energy usage
Cooler temperatures Urban tree canopy decreasing
Planting programs seek to reverse
this trend Solar costs decreasing, installations
increasing, grid parity by ~2020
Two relevant types in cities:
photovoltaic and solar thermal 'Solar premium' on residential
'Smart grid' fits well with solar Solar Safe Zones are site- specific
Plant lists by site for clearance
Streetscape solutions by cardinal direction Neighborhood-scale solutions usually in new construction
Only ~20-25% of residential roofs are appropriate collection sites
Arborists are here to help Thank you! Dan Staley
DCS Consulting Services

http://prezi.com http://danstaley.net/GUFC-hand.pdf Right Tree, Right Place, Right Reason Nationwide, ~25-35% of Residential
Roofs are Suitable for Solar Energy
Collection Summary Trees have particular benefits in specific places
Parcel scale: solar safe zones with plant lists for maximum height at maturity
Street scale: species for one side of street (different treelawn widths??)
Ash, elm are opportunities for solar
Neighborhood scale: begin at beginning of design process
Solar adds value to parcel, project, neighborhood
Existing trees are repeat customers for solar safe pruning Environmental
Psychology Business Opportunities
Full transcript