how to save water with green building construction
DESCRIPTION
a presentation on water scarcity world-wide and in the Arabian Gulf in particular and an introduction to improve water efficiency in buildingsTRANSCRIPT
www.qatargbc.org
"Green Building Introduction Seminar II “The Interdependence of Fresh Water Use, CO2 Emissions,
Global Warming and their Environmental Impact
QGBC Villa- 26 July 2010- Doha, Qatar
© Ortner Consulting 2010By: Alex Penzias & Nadja Ortner
Environmental Data Qatar
● WaterConsumption perCapita
675l/day
● EnergyConsumptionper Capita
19,466kg(oil) p.a.
● CO2Emissionper Capita
44.4 metrictons p.a.
US 575lEU 200-300l
GCC av.10,601 kg
GCC av. 23.4metric tons
Indoor Environ-mental Quality
Land use
Heating &Cooling
Transportation
Lighting
BuildingOrientation
MaterialSelection
Waterefficiency
Energyefficiency
Of those 0,9% freshwater only 1% is accessible for human use
WORLD WATER DISTRIBUTION
Why reduce your water consumption?
Stop desertification
Save energy
Preserve natureSave money
Conserve NaturalResources
Reduce GHGEmissions
Why reduce your water consumption?
Waterconsumption
Energyconsumption
Co2 emissions
Water vapor
Polar caps melting
Why reduce your water consumption?
Waterconsumption
Energyconsumption
Co2 emissions
Water vaporUpsala Glacier, Argentina, 1928
Upsala Glacier, Argentina, current
Glaciers melting
Why reduce your water consumption?
Waterconsumption
Energyconsumption
Co2 emissions
Water vapor
Desertification
Contribution of various gases to the greenhouse effect:
Interrelationship Water vs. Energy
Source: US Department of Energy, Dec 2006
sewagetreatment
desalination
hydropowergeneration
electricitygeneration
domesticbuildings
Water efficiency in buildings
Overcoming challenges with the most fundamentalresource of our planet by increasing the efficiency ofwater consumption
Defining Green Buildings
Source: USGBC
Design and construction practices that
reduce negative impact of buildings on the environment
safeguard water use and water efficiency
promote energy efficiency and renewable energy
conserve materials and resources
Green buildings can reduce:
Energyuse
CO2emissions
Wateruse Solid
Waste
24% - 50%
33%-39%
70%
40%
Definitions of Water
Grey Water
PotableWater
Black Water
Wastewater generated by taking ashower, dishwashing and doing your
laundry
Wastewater generated by your toilet
Water that comes out of your tap
ProcessWater
Boiler feed water, cooling water forheat exchangers, chillers, etc.
Water Efficiency
Water savings from:
• Water-efficient fixtures and appliances (dual-flush toilet, low-flowfixtures)
• Water-efficient landscaping (drip irrigation, native plants, water sensors)
• Rainwater collection systems (ponds, cisterns)
Benefits include:
• Lower water bills
• Lower volumes of wastewater
• Lower energy costs for hot water
European style home in a humid desert climate:
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• 1350 square feet• 3 bedrooms• 2 bathrooms• 1 car garage
For 1 acre of built-up area (32 homes) in a humid desertclimate 3338 kilo gallons of water are needed annually
Source: NEAT
Comparison: water efficient house versus conventional house
Source: www.thinkwater.act.gov.au
DeconstructionMaterial Reuse
Construction
Design forConstruction
OccupancyMaintenance
Processing ofRaw Materials
Extraction ofRaw Materials
ENVIRONMENTAL IMPACT
LIFE CYCLEANALYSIS
LIFE CYCLE COST
What you can do to reduce your waterconsumption:
Install low flow faucetsand shower heads
Install aerators forhigher pressure
Reuse/recycle grey andprocess water
Take a shower instead ofa bath
Install moreefficient/dual flush
toilets
Thank you for your attention!
