Sustainable Architecture and Real Estate Development...Buildings and Energy Use • Mainly consume...
Transcript of Sustainable Architecture and Real Estate Development...Buildings and Energy Use • Mainly consume...
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Sustainable Architectureand Real Estate Development
Whole Systems Thinking to Produce
Energy Reductions
By Evan Jahn
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Sustainability and Buildings
• Measure of efficient design
– Energy use
– Waste
– Carrying capacity
– Resource use
• Sustainable
– To keep in existence,
renewal
– Long-term productivity
•Principles in context
–Land development
–Design and construction
–Occupant considerations
–Building disposition
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Buildings and Energy Use
• Mainly consume energy for:– Heating/Cooling
– Lighting
– Tenants and resident behavior becomes very important in controlling these
• In Chicago buildings represent 68% of the GHG emissions
• 3/4 of lifecycle costs occur after the completion of construction– Usable lifespan of ~50-125 years
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Technology’s Role• Using low-energy and renewable technologies allows
buildings to directly reduce energy needs.
• Natural system integration reduces the need for forced control and further contributes to energy reduction.
• Types of technology used:
– Passive cooling
– Lighting and day lighting
– Solar controls
– Photovoltaic
– Integrated energy systems
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Winter Summer
Passive Cooling and Heating
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Vollklima good practice office
builing
Deutsche Post
Design
Messwerte 2003
EndenergiebedarfVergleich typische Gebäude / Post Tower
Kühlung Lüftung
Beleuchtung Heizung
- 51 %
Primary Energy
92 kWh/m2/a
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Natural Day Lighting
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Savings Compared to Standard Air System: 65.000 t CO2/aApproximate Equivalency CO2 Value. 1,300,000 €/a
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Solar Control and Shading
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•Reflectivity
•Automated system of moving louvers
•Covered city
Masdar City Proposal - U.A.E.
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Energy Use
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A Tracking Solar Energy Shield is proposed to
reduce solar gains on the curved facade. Initial
estimates show that a 50% opaque 36 m wide
tracking solar shield may reduce solar heat gain
into the building by approximately 21%.
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Integrated Energy Systems
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Jebel Ali - Urban Center
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Solar Array
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A Solar Chimney can be used to drive a Turbine with
the warm buoyant air flows. Additionally water may be
harvested through condensation of the warm moist
plume.
•Estimated to generate up to 11% of building’s energy
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Whole Systems Development
• Has the potential to reduce huge amounts of energy from various systems that are not currently being utilized inefficiently– Sewage and storm water collection
– Waste disposal
– Industrial ecology
– Water supply
• Reduces lifecycle costs and increases efficiency by creating multiple closed loop systems with little transmission loss.
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10-12
million
housing
units being
added in
China per
year
The built area will
double in the next
25 years
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Consequences• Making it harder to access public transportation and
efficiently walk in cities
• Shifting desired mode of transportation to cars– Growth rate of 2 billion vehicles/year currently in China
– Increased traffic and congestion
– Lost efficiency of current infrastructure
• 75% of CO2 emissions can be linked to this type of urban development
• Quality of life deteriorated because municipalities are unable provide efficient public services such as trash collection and health care
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How do we get there?
• Update building code
• Zoning regulation update
• Transit orientated development
• Energy policy– Renewable Portfolio Standards
– Distributive generation
• Offsets for small renewable projects– Important for trapping carbon equivalent gases
like methane (x20)
• Carbon tax on development
• EISA-Title V
• LEED standards
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Questions?