MASTER PLANNING FOR NET-ZERO ENERGY AND ...GEOS NET-ZERO ENERGY NEIGHBORHOOD, Arvada, CO Michael...
Transcript of MASTER PLANNING FOR NET-ZERO ENERGY AND ...GEOS NET-ZERO ENERGY NEIGHBORHOOD, Arvada, CO Michael...
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MASTER PLANNING FOR NET-ZERO ENERGY AND OTHER INTERTWINED SUSTAINABLE SYSTEMSMichael Tavel AIA, David Kahn ASLACourse FR102, Friday June 21, 7:00 AM, LU 1 HSW
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OBJECTIVES
Introduce an approach to planning that:
• Integrates Energy Conservation and Production• Intertwines Stormwater with Civic Space• Fosters Environmental Stewardship and Community Life• Utilizes Climate Specific Strategies
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ENVIRONMENTAL CONCEPTS
• Appropriate Use of Land• Energy• Water• Ecology• Materials
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SOCIAL CONCEPTS
• Community• Equity, Affordability, and Inclusiveness• Enfranchisement• Opportunities for Stewardship• Health and Well-Being
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ECONOMIC CONCEPTS
• Local Resilience• Local Economic Relationships• Efficient and Renewable Use of Local Resources• Local Food Production• Financial Viability
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COMPETING PARADIGMS
SMART GROWTH• Coordinating Land Use with Transportation• Higher Density =
• Lower environmental impacts per capita:• Lower CO2 Emissions, lower resource consumption
• Sustainability of Infill, as well as Historic Preservation• Brownfields (build in Detroit, not in the West)• Emphasis on North American, East Coast, Urban Form
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LANDSCAPE URBANISM
• Emphasis on Process over Form• Natural processes that underlie man-made
environments• Layering of natural and ecological systems with
human systems• Temporal and successional processes: Cities form
a complex ecosystem - a complex web of relationships - that emerges over time
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RE-LOCALIZATION
• Local Resilience• Local Economy• Local Food (“The Food Shed”)• Urban Homesteading
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CLIMATE-RESPONSIVE URBANISM
• Passive design in urban contexts• Reducing resource demands through morphology
and behavior
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CLIMATE-RESPONSIVE URBANISM
• In the era of cheap energy, we have forgotten how to employ passive means to reduce our demand for resources.
• In addition to technology, we need to relearn what was lost, and first reduce our demands through passive design and sustainable practices.
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SUSTAINABILITY AS A PRACTICE
Sustainability is not a technology. Sustainability is not a public policy. It is not a morphology, or a system.It is not these things by themselves.
Sustainability is a practice. A cultural behavior. It is coupled with morphology, systems, technology, and policy.
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TRADITIONAL ENVIRONMENTS
For 10,000 years, sustainable systems have been woven into the morphology of urban development patterns.
Those patterns were fine tuned for the conservation and harnessing resources, and making a climate habitable.
Sustainable systems, and sustainable morphologies, were coupled with sustainable practices.
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THE AGRARIAN VILLAGE: A universe of cultural knowledge about Climate, Sun, Water, Food, and Energy
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HOT ARID CLIMATES
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EVAPORATIVE COOLINGCOURTYARDSNARROW PEDESTRIAN LANES
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DIURNAL CLIMATES
A CULTURE OF CLIMATE, ACCLIMATING TO THE SEASONS
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COLD CLIMATES
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COMPACT, ATTACHED FORMS
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DESIGN WITH CLIMATEVICTOR OLGYAY, 1960
STRATEGIES FOR PASSIVEDESIGN FOR FOUR CLIMATES:
1) COLD2) TEMPERATE3) HOT ARID4) HOT HUMID
He looked at a passively designed morphology for the built environment of the suburban world that was envisioned as the predominant future back in 1960.
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HOT ARID CLIMATEPHOENIX
1) Breezes do not cool you. Evaporation and shade cool you
2) Block out the sun from heating the human environment
3) Courtyards4) Slight east-west
elongation5) Minimize east and
west exposure6) Windows should be
small, and shaded
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COLD CLIMATEMINNEAPOLIS
1) Compact Structures
2) Attached Structures
3) Slightly elongate east to west
4) Shelter against winter winds
5) Capture winter sun6) Small windows
except on south7) Deciduous trees for
summer shade.
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TEMPERATECLIMATENEW YORK CITY
1) Buildings open to south and southeast, closed to west
2) Elongate east to west
3) Cross ventilate in summer
4) North-South Wings ok for capturing summer breezes
5) Shade trees on east and west.
6) Outdoor living.
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HOT HUMID CLIMATEMIAMI
1) Maximize breezes for cooling
2) Separate and stagger buildings to capture breeze
3) Minimize walls and maximize overhead shade from roofs and trees
4) Block east and west sun
5) Minimize surface area of building facing east and west
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Study by BIRA(Building Industry Research Alliance)
Stretching the same rectangular suburban home in an east-west orientation, versus north south, reduced annual heating and cooling loads by 70% in San Diego, and 30% in Sacramento.
Rules of thumb supported by peoples’energy bills.
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PASSIVE DESIGNSOME CONCLUSIONS:
This is a huge body of regional knowledge that should be learned and researched.
We can learn much by researching traditional environments around the globe, in climates similar to those in which we practice.
We need to give regional passive design strategies a clear vocabulary, and incorporate it into our work as sustainable systems.
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INTERTWINED SUSTAINABLE SYSTEMS:
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INTERTWINED SUSTAINABLE SYSTEMS:
ENERGY CONSERVATION:Passive cooling and heating
ENERGY GENERATION:Active Solar or Ground Source
STORMWATER OPTIMIZATION:Water Quality andPassive Irrigation
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INTERTWINED SUSTAINABLE SYSTEMS:
FOOD PRODUCTION:At Community andPrivate Scales
ECOSYSTEMS AND HABITATS:Natural and Constructed
SOCIAL ENVIRONMENTS:Supporting Community and a Culture of Stewardship
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INTERTWINED SUSTAINABLE SYSTEMS:
CIRCULATION AND CONNECTIVITY:Walking, Biking, and Integrating Modes
DIVERSITY OF HOUSING OPTIONS:Supporting affordability, and a diverse population
MIXTURE OF USES:Local Work and Services
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BedZEDSouth London – Built 1998-2002, Bill Dunster, Architect• 82 Unit Mixed Use Zero Energy Development
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Energy & Resources
• East-West Layout for maximum solar exposure
• North-South Spacing for solar access
• Compact & Attached
• Super-insulated, air tight building envelope
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Energy & Resources
• South Facing Conservatories for Living Spaces
• South Facing Gardens
• Photo Voltaic Panels on south facing roofs
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Energy & Resources
• North Sloped Roof-scape for Work Spaces
• Green Roofs Built into North Slopes
• Wind Driven Ventilation with Heat Recovery System
• 90% reduction in space heating
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CIRCULATION & CONNECTIVITY
• Driving Lanes and Parking on Periphery
• Pedestrian Interior Space
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CIRCULATION & CONNECTIVITY
• Electric Vehicle Charging Stations
• Car Sharing Program
• Train, Bus, & Tram Links
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SOCIAL ENVIRONMENTS
• Community Facility
• Café,Gallery, Event Space
• VegZED Food Co-op and Farmer’s Mkt.
• Yoga, Tai Chi, Drama, Dance, Exercise Classes
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SOCIAL ENVIRONMENTS
• 20 DU/Acre
• Mix of unit sizes and prices
• Affordable and market rate, for sale and for rent.
• 27,000 sf office
• Green Lifestyle Officer
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DAS SONNENSCHIFF - “Solar Ship”Freiburg, Germany - 2004, Rolf Disch, Architect52 Unit Mixed Use Net-Plus Energy Neighborhood
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ENERGY & RESOURCES
• Buildings Aligned East-West
• North-South Spacing for solar access
• Compact & Attached
• Super-insulated, air tight building envelope
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SOLAR LAYOUT
• South Facing Shed Roofs
• Solar Panels double as Sun Shades
• Solar Overhangs
• South Facing Landscapes
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CIRCULATION & CONNECTIVITY
• North-South Vehicular Lanes
• Parking on Periphery
• East-West Pedestrian Passages
• Sheds and Hedges Screen Lanes for Privacy
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COURTYARD MICROCLIMATES
• Sheltered from Wind, Sound, and Traffic
• Network of Lanes, Pathways, and Social Spots
• Create Intimate Neighborhood
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ECONOMICVIABILITY
• Mixed-Use Solar Ship
• Natural Food Store
• Pharmacy
• Offices and Retail
• 9 Rooftop Dwellings
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ECOLOGY, STEWARDSHIP, AND INDOOR/OUTDOOR LIVING
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• Open to South Facing Outdoor Rooms
• Passive cooling, water retention, food and habitat
• Rain Water and Grey Water Recycling for Irrigation
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GREEN ROOF GARDENS
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GREENSBURG GREEN NEIGHBORHOODSGreensburg, KansasBy a collaborative team led by Michael Tavel
Meeting the needs ofseniors, children, and non-nuclear families
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Regional Context and FasTracks
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SUSTAINABILITY & COMMUNITYCHILDREN & FOODSENIORS & NEIGHBORSAFFORDABILITYNET-ZERO ENERGY(THE PASSIVE HOUSE)WATER & GARDENS
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Regional Context and FasTracks
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Regional Context and FasTracks
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Regional Context and FasTracks
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Regional Context and FasTracks
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Regional Context and FasTracks
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GEOS NET-ZERO ENERGYNEIGHBORHOOD, Arvada, COMichael Tavel Architects and David Kahn Studio
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Mixed-use neighborhood that incorporates sustainable systems,and supports opportunities for sustainable living.
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Net-Zero Urbanism
Urban Density optimized with Passive Solar Orientation
High performance “Passive House” building strategies
Energy comes from Photovoltaics and Ground Source Loop Fields.
*There are no natural gas lines.
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Civic Stormwater
Rain Gardens in every yard andcourtyard
Street Tree Rain Gardens between sidewalk and curb
Percolation Parks threaded through neighborhood
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Integrate contact with nature into everyday life
Agriculture at private and community scales
A diverse path and plaza network that fosters a walkability, community and outdoor living
CommunityStewardship:“Be The Resource”
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Views Looking West of Regional Greenway and of Site
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Design Process: Site Reconnaissance
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Identifying a site’s qualities and potential
Special Places:
The creekView from the top of a small bluff overlooking the lower floodplain
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Mapping of Systems
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Latent site qualities articulated in design sketches.Flow of circulation, water, and land uses
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Frameworks of drainage and positive open space.
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Solar Spacing and Drainage Ways
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Mixed Uses, Developable Lots, Blocks, Zoning, Parking…
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Solar Development Pattern Research: Looking Internationally
BERLIN
ASUNCION
LA PAZ
DENVER
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DENVER’S HIGHLAND NEIGHBORHOOD
CORNER STORES
TOWNHOMES AT ENDS OF BLOCK
PARKING AT ALLEYSAND ON‐STREET
SINGLE FAMILY AND DUPLEXES
Geos Plan Based on Traditional Development Pattern
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TRANSFORMATION DIAGRAMS
Integrate Passive Solar &Optimize Solar Orientation with Urban Density
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Integrate Active Solar:Coordinate Tree Heights with Active Solar Access
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Master Land Use Plan
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Bio-Civic Realms
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Network of Social Spaces
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Street Tree Rain Gardens: Stormwater Streetscapes
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Percolation Parks: Rain, Snow, & Community Life
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Neighborhood Greens: Community Scale and Utility
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Fruit Trees Terraces and Community Gardens
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Food, Gathering, Ecology, Stewardship
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Town Squares: Mixed Use Community Space
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Layers of Use and Inhabitation
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Ecology, Commerce, Community, and Events
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The Checkerboard Blocks
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Sustainable Homes are “Not Too Big”
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Net-Zero Energy
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Checkerboard Live/Works
Townhouses or live/work homes with ground level home offices are permitted in these locations.
A wide townhouse layout permits solar gain to side-by-side bedrooms and side-by-side living spaces.
Service spaces are to the north.
Doors and windows to the north are minimized.
Windows and overhangs are optimized for passive solar heating and cooling.
Homes open to sunny, south-facing yards.
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Live/Work Site Plan
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Live/Work homes with south-facing patio yards
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Checkerboard Single Family
Every other home is either an alley house, or at the front of the lot.
Yards are shaped like courtyards.
Doors and windows to the north are minimized.
Windows and overhangs are optimized for passive solar heating and cooling.
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Private Landscapes at Checkerboard Homes
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Public Fronts of Single Family Homes
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Checkerboard Intertwining
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Public Frontage at Checkerboard Homes
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CONCLUSIONPlanning for Net-Zero Energy and Intertwined SustainableSystems involves:
• Thinking across multiple paradigms• Coordinating systems to strengthen one another.• Using passive, climate-specific strategies to reduce
resource demands first.• Considering sustainability as a practice, and how design
supports a culture of stewardship.• Acknowledging that places are like a complex
ecosystem, and develop over time.