CONSt. Tech( Green Building)

7/29/2019 CONSt. Tech( Green Building)

1/38

Green building is the practice of increasingthe efficiency with which buildings use

resources such as energy, water andmaterials, while reducing building impacts onhuman health and the environment duringthe building's lifecycle, through better siting,design, construction operation,maintenance, and removal.


2/38

Green buildings are designed to reduce the overall

impact of the built environment on human health

and the natural environment by:

Efficiently using energy, water, and other resources

Protecting occupant health and improvingemployee productivity

Reducing waste, pollution and environmentaldegradation.


3/38

A similar concept is natural building, which isusually on a smaller scale and tends to focus

on the use of natural materials that areavailable locally. Other commonly used termsinclude sustainable design and greenarchitecture.


4/38

The related concepts of sustainabledevelopment and sustainability are integralto green building. Effective green buildingcan lead to:

1) reduced operating costs by increasingproductivity and using less energy and water.


5/38

Improved public and occupant health due toimproved indoor air quality.

Reduced environmental impacts by, forexample, lessening storm water runoff andthe heat island effect.


6/38

Practitioners of green building often seek toachieve not only ecological but aesthetic

harmony between a structure and itssurrounding natural and built environment,although the appearance and style ofsustainable buildings is not necessarilydistinguishable from their less sustainablecounterparts.


7/38

Green building practices aim to reduce theenvironmental impact of buildings.

Buildings account for a large amount of landuse, energy and water consumption, and airand atmosphere alteration


8/38

In the United States, more than2,000,000 acres (8,100 km2) of open space,

wildlife habitat, and wetlands are developedeach year.


9/38

As of 2006, buildings used 40% of the totalenergy consumed in both the US and

European Union. In the US, 54% of thatpercentage was consumed by residentialbuildings and 46% by commercial buildings.


10/38

In 2002, buildings used approximately 68 percent of

the total electricity consumed in the United States

with 51 percent for residential use and 49 percent

for commercial use.


11/38

38 % of the total amount of carbon dioxide inthe United States can be attributed to

buildings, 21% from homes and 17.5 % fromcommercial uses. Buildings account for 12.2%of the total amount of water consumed perday in the United States.


12/38

The environmental impact of buildings is often

underestimated, while the perceived costs of green

buildings are overestimated. .


13/38

A recent survey by the World Business Councilfor Sustainable Development finds that green

costs are overestimated by 300%, as keyplayers in real estate and constructionestimate the additional cost at 17% aboveconventional construction, more than triplethe true average cost difference of about 5%.


14/38

Green building brings together a vast array ofpractices and techniques to reduce and

ultimately eliminate the impacts of buildingson the environment and human health.


15/38

The practice often emphasizes takingadvantage of renewable resources, e.g., using

sunlight through passive solar, andphotovoltaic techniques and using plants andtrees through green roofs, rain gardens andfor reduction of rainwater run-off.


16/38


17/38


18/38


19/38

Many other techniques, such as using packedgravel for parking lots instead of concrete or

asphalt to enhance replenishment of groundwater, are used as well.


20/38

Effective green buildings are more than just arandom collection of environmental friendly

technologies. However they require careful,systemic attention to the full life cycleimpacts of the resources embodied in thebuilding and to the resource consumptionand pollution emissions over the building'scomplete life cycle.


21/38

On the aesthetic side of green architecture orsustainable design is the philosophy of

designing a building that is in harmony withthe natural features and resourcessurrounding the site.


22/38

There are several key steps in designingsustainable buildings: specify 'green' building

materials from local sources, reduce loads,optimize systems, and generate on-siterenewable energy.


23/38

Building materials typically considered to be'green' include rapidly renewable plant

materials like bamboo and straw, lumberfrom forests certified to be sustainablymanaged, dimension stone, recycled stone,recycled metal, and other products that arenon-toxic, reusable,..


24/38

Renewable, and/or recyclable eg. Linoleum,sheep wool, panels made from paper flakes,

compressed earth block, adobe, baked earth,rammed earth, clay, vermiculite, flax linen,sisal, seagrass, cork, expanded clay grains,coconut, wood fiber plates, calcium sandstone.


25/38

Green buildings often include measures toreduce energy use. To increase the efficiency

of the building envelope, (the barrierbetween conditioned and unconditionedspace), they may use high-efficiency windowsand insulation in walls, ceilings, and floors.Another strategy, passive solar is often


26/38

implemented in low-energy homes. Designersorient windows and walls and place awnings,

porches, and trees to shade windows androofs during the summer while maximizingsolar gain in the winter.


27/38

In addition, effective window placement (daylighting) can provide more natural light and

lessen the need for electric lighting during theday. Solar water heating further reducesenergy loads.


28/38

Finally, onsite generation of renewableenergy through solar power, wind power,

hydro power or biomass can significantlyreduce the environmental impact of thebuilding. Power generation is generally themost expensive feature to add to a building.


29/38

Green architecture also seeks to reducewaste of energy, water and materials used

during construction. For example, inCalifornia nearly 60% of the state's wastecomes from commercial buildings During theconstruction phase, one goal should be toreduce the amount of material going tolandfill.


30/38

Well-designed buildings also help reduce theamount of waste generated by the occupants

as well, by providing on-site solutions such ascomposite bins to reduce matter going tolandfills.


31/38

To reduce the impact on wells or watertreatment plants, several options exist.

"Greywater", wastewater from sources suchas dishwashing or washing machines, can beused for subsurface irrigation, or if treated,for non-potable purposes, e.g., to flush toiletsand wash cars. Rainwater collectors are usedfor similar purposes.
http://en.wikipedia.org/wiki/Greywaterhttp://en.wikipedia.org/wiki/Greywater


32/38

Centralized wastewater treatment systemscan be costly and use a lot of energy. An

alternative to this process is converting wasteand wastewater into fertilizer, which avoidsthese costs and shows other benefits. Bycollecting human waste at the source andrunning it to a semi-centralized biogas plantwith other biological waste, liquid fertilizercan be produced.
http://en.wikipedia.org/wiki/Biogashttp://en.wikipedia.org/wiki/Biogas


33/38

UNEP and Climate changeUNEP works to facilitate the transition to low-

carbon societies, support climate proofingefforts, improve understanding of climatechange science, and raise public awarenessabout this global challenge.
http://en.wikipedia.org/wiki/UNEPhttp://en.wikipedia.org/wiki/UNEP


34/38

GHG IndicatorThe GHG Indicator: UNEP Guidelines for

Calculating Greenhouse Gas Emissions forBusinesses and Non-CommercialOrganizations


35/38

Agenda 21

Agenda 21 is a programme run by the United

Nations (UN) related to sustainable development. It

is a comprehensive blueprint of action to be takenglobally, nationally and locally by organizations ofthe UN, governments, and major groups in every

area in which humans impact on the environment.

The number 21 refers to the 21st century.
http://en.wikipedia.org/wiki/Agenda_21http://en.wikipedia.org/wiki/Agenda_21


36/38

FIDIC's PS

FIDICs Project Sustainability Management

Guidelines were created in order to assistproject engineers and other stakeholders insetting sustainable development goals fortheir projects that are recognized and

accepted by as being in the interests ofsociety as a whole.


37/38


38/38

CONSt. Tech( Green Building)

Documents

Transcript of CONSt. Tech( Green Building)