GREEN BUILDINGS
ROHIT SHARMA
PT101815
MCEM
1Green Buldings by Rohit Sharma
Green Buldings by Rohit Sharma 2
Introduction- What is Green Building?
Significance of Green Buildings
How a Building can be Certified?
Green Building Rating System (LEED)
Case Study
Conclusion
Index
What is Green Building???
• Energy Efficient
• Water Efficient
• Better Indoor Environment
• Use Environmental friendly and Sustainable materials for construction
• Reduced Environmental Impact throughout the life cycle.
3Green Buldings by Rohit Sharma
Conventional Green Building Sustainable Building
Path… Goal…Reality…
Green buildings incorporate the best ancient building approaches in logical combination with
the best technological advances to address environmental issues such as Energy, Water,
Material , Indoor air quality and Site. And also include recycling construction waste.
Reasons for Un-sustainability
• Increasing Population
– The global population has been growing exponentially for the past 250 yrs. The present world
population of 7.3 billion is expected to be 8.5 billion by the year 2030,in which case it would have
been doubled in 30 yrs.
• Urbanization
– In 1800, the world had 50 cities of over 100,000 people – today there are over 1600 cities .While
almost half of the world’s population is already urban.
1950 - 29.7%
2000 - 47.4%
2030 - 61.1%
• Air Pollution
» Increase in green house gases
» Depletion of Ozone layer
• Water Pollution
– Only 3% of the earth’s water is fresh water that could be used for drinking, and 2/3rd of this is locked
up in the polar ice caps and the glaciers. The fresh water resources are threatened by an increasing
demand of the increasing population.
Green Buldings by Rohit Sharma 4
Reasons for Un-sustainability
• Non- Renewable Resources
– The main problem with these resources is the release of carbon dioxide in the atmosphere when they
burn. The atmosphere at present contains 700 billion tones of carbon, which is responsible for global
warming.
– There is no way people of the world can use up the fossil fuel reserves without destroying the planet.
Energy is the key problem to be tackled if man has to continue living on the earth.
• Land
– Land covers approx. 24.2% of the earth’s surface, out of which only 12% is habitable and cultivable
and supports human population of about 7.3 billion. But this resource is being degraded at an alarming
rate . The ratio of man to land in U.S. is 1:12 acres ; in England it is 1:1 , whereas in third world
countries it is 3:1.
– 15 million of additional acres of desert are created each year and 24-26 billions of top soil are lost
worldwide.
Green Buldings by Rohit Sharma 5
Non-
Buildings
60%
Buildings
40%
World Energy Consumption
Green Buldings by Rohit Sharma 6
Non-
Building
75%
Building
25%
World Wood Consumption
Non-Building
83%
Building
17%
World Water Consumption
Significance of Green Buildings…
• Climate Change
• Depletion of resources
• Ozone depletion
• Land Pollution
• Water Pollution
• Air Pollution
Green Buldings by Rohit Sharma 7
Can you guess which of the following has the highest
contribution towards green house gas emissions?
Industries
Transportation
Buildings
Green Buldings by Rohit Sharma 8
Industries
25%
Transportation
32%
Buildings
43%
Contribution to CO2 emission
Green Buldings by Rohit Sharma 9
Now if we divide this 43% into residential, commercial and industrial buildings, we get
the following %
Residential - 21%
Commercial - 17%
Industrial - 5%
Why to go Green???
Green Buldings by Rohit Sharma 10
How a Building can be Certified?
There are various green building rating system available all over the world to verify and
certify green buildings-
• Australia - Green Star
• Brazil - AQUA/ LEED Brazil
• Canada - LEED Canada/ Green Globes
• China - GB Evaluation Standards for Green Buildings
• Finland - PromisE
• Germany - DGNB
• Hong Kong - HKBEAM
• India - GRIHA / LEED India
• UAE - Pearl Rating System
• US - LEED
• UK - BREEAM (first ever green building rating system in the world)
• Taiwan - EEWH
• Qatar - QSAS
Green Buldings by Rohit Sharma 11
Green Building Rating System (LEED India NC)
Green Buldings by Rohit Sharma 12
Category Prerequisites Credits Possible points
Sustainable Sites (SS) 1 8 26
Water Efficiency (WE) 1 3 10
Energy & Atmosphere (EA) 3 6 35
Materials & Resources (MR) 1 7 15
Indoor Environmental Quality (EQ) 2 8 15
Innovation & Design Process (ID) None 2 5
Regional Priority None 1 4
Totals: 8 35 110
LEED – Certification
2009 LEED-NC Certification Levels
Certified: 40 - 49 points
Silver: 50 - 59 points
Gold: 60 - 79 points
Platinum: 80 points and
above
13Green Buldings by Rohit Sharma
Case – Study
ITC Green Centre, Gurgaon
14Green Buldings by Rohit Sharma
Case – Study
ITC Green Centre, Gurgaon
• Buiding: ITC Green Centre
• Location: Gurgaon, India
• Floor Area: 1, 70,000 Sq.Ft
• Architect: Rajender Kumar & Associates,
New Delhi, India
www.rka.com
• Significance: Platinum Rated green building
• Rated by: USGBC-LEED (US Green Building Council -Leadership in Energy and Environmental Design)
through CII IGBC, Hyderabad .
www.igbc.in
• Completion Year: 2004
• Points Scored: 52/69
Green Buldings by Rohit Sharma 15
Sustainable Site
• Alternative Transportation: Parking, shower & changing facilities for bicyclists, pool cars ( A car pool is an
arrangement where a group of people take turns driving each other to work) with charging facility.
• Storm Water Management: Rainwater recharge pits to ensure zero discharge into municipal drainage.
• Heat Island Effect: 80% underground parking. More than 75% of the terrace has been insulated and coated
with the reflective high albedo (Albedo is the fraction of solar energy (shortwave radiation) reflected from
the Earth back into space.) roof paint.
• Light Pollution Reduction: Minimum exterior lighting to limit night sky pollution(three main types of light
pollution include glare, light trespass and skyglow.)
Green Buldings by Rohit Sharma 16
Blow
up
Water Efficiency
• Water Efficient Landscaping: Native plants, high efficiency irrigation system and 100% recycled water for
irrigation.
• Innovative Waste Water Technologies: Fluidized Aerobic Bioreactors (FAB) sewage treatment plant
provided.
• Water Use Reduction: 40% reduction in water usage over base case.
Green Buldings by Rohit Sharma 17
Energy & Atmosphere
• Energy: Exceeds ASHRAE 90.1 (Energy Standard for Buildings Except Low-Rise Residential Buildings)
base case standards by 51%.
• Envelope: External wall of 250mm thickness. Autoclaved Aerated Concrete Blocks, double glazed
windows, 75mm-thick extruded polystyrene roof insulation. Extruded polystyrene (XPS) is a type of
insulation material with a high R-value(The R-value is a measure of thermal resistance used in the building
and construction industry), good moisture resistance, high structural strength and low weight. Extruded
polystyrene is used extensively as thermal insulation in industrial, commercial and residential construction
• HVAC: Chillers of COP 6.1, double skinned AHUs, VFDs [A Variable Frequency Drive (VFD) is a type of
motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric
motor], VAVs [Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC)
system], Heat Recovery Wheel.
• Hot Water: Solar thermal technology.
• Ozone Depletion: All HVAC equipment are free from CFC / HCFC / Halons.
Green Buldings by Rohit Sharma 18
Materials and Resource
• Storage and Collection of Recyclables: Separate storage bins provided at each floor level for different
recyclable materials such as paper, cardboard, glass, plastic and metals.
• Resource Reuse: More than 10% of the building materials are refurbished / salvaged from other sites.
• Recycled Content: Fly ash based cement; Fly ash based AAC Blocks, acoustic ceiling, glass, ceramic tile,
MDF (Medium density fibreboard) cabinets, etc.
• Regional Materials: More than 40% of the building materials are from within 100 miles of the project site.
• Rapidly Renewable Materials: Such as medium density fibre board.
• Certified Wood: New woods used are certified under the Forest Stewardship Council, US.
Green Buldings by Rohit Sharma 19
MDFAAC Blocks
Indoor Environmental Quality
• Environment Tobacco Smoke Control: Designated smoking rooms are provided at convenient locations
with separate exhausts.
• CO2 Monitoring: Sensors at various locations monitor CO2 levels.
• Low Emitting Materials: Low VOC [Volatile organic compounds (VOCs) are organic chemicals that have a
high vapour pressure at ordinary room temperature.] levels of adhesives / sealants used for carpets
/composite woods / paints.
• Daylight and views: Views to external glazing from at least 90% of regularly occupied areas.
Green Buldings by Rohit Sharma 20
Highlights of the building
1. Use of glass which has 19% recycled content helped ITC to get points in recycle content.
2. Use of other recycled and recyclable resources, with materials like fly ash based cement etc. More than
10% of the building materials used are recycled, refurbished or salvaged from other sites .
3. 40% of the total raw materials used were procured within 100 miles of the project site such as double
glazed glass façade and window framing, 250mm thick auto-claved and aerated concrete block wall .
4. Daylight and views: Views to external glazing from at least 90% of regularly occupied areas
5. Use of solar photo voltaic for emergency lighting .
6. Use of green material to reduce heat gain from rooftop / building envelope with high performance glazing
and proper insulation material .
7. CFC/HCFC free HVAC equipment is used to combat ozone depletion.
8. Installation of solar hot water system and solar concentrator.
9. Low cost version of this idea is to paint the rooftop white or roll out gunny bags in summer .
Green Buldings by Rohit Sharma 21
GREEN FEATURES OF THE BUILDING
• Fly Ash based cement used
• Autoclave Aerated Concrete (AAC) Blocks
• Double glazed windows with low-e coating
• Rain water harvesting
• Water saving techniques
• CFC, HCFC & Halon free air- conditioning system
• Energy efficient lighting (T5 lamps with electronic ballast, high efficient luminaires)
• Water efficient landscaping
• Sewage treatment plant and waste water recycling.
• Use of Low VOC [Volatile organic compounds ], rapidly renewable & certified materials
• Eco friendly house keeping chemicals & practices
• Carbon dioxide (co2) monitoring indoor chemical & pollutant source control (Dedicated copy printer room
with independent exhaust) indoor air quality (iaq) system.
• Optimized energy performance through efficient designs light pollution reduction ozone protection ( by
using cfc, hcfc & halon free refrigerants) water use reduction storm water management
• Use of recycled materials
• co2 monitoring systems in AHU (operates when internal co2 is 530ppm Or more than external
atmosphere)20 days flush out(testing) of entire building air prior to occupation
Green Buldings by Rohit Sharma 22
CONCLUSION
• As the human population is increasing exponentially, the demand is increasing day by day, which is causing
rapid depletion of resources.
• Energy is the major concern if humans want to sustain on the planet in the long run.
• For this human’s need to focus on the reasons for un-sustainability.
• In construction field the reasons for un-sustainability can be dealt by following the path of green buildings.
• Through green buildings we can decrease…
– Carbon emission
– Solid Waste
– Water use and
– Energy use
• And this is how we can move towards the Sustainable buildings by decreasing their Environmental Impact.
Green Buldings by Rohit Sharma 23
Sources
• Architectural Thesis (TH 0888), Green over Grey, Library, CEPT University.
• People , Settlements , Environment and Development , UNCHS , 1992
• Maitra , A.K. Environmental Planning in India, ITPI Journal, Dec. 1993
• Towards sustainable future – Indian Architect and Builder, nov. 1992 – Herbert , Alan
• By William McDonough & Michael Braungart
(http://www.mbdc.com/cradle-to-cradle/c2c-framework/)
• Norton John, Sustainable Architecture : A Definition , Habitat Debate Vol.5 No.2
• Energy Efficiency In Green Buildings –Indian Concept
(International Journal of Emerging Technology and Advanced Engineering Volume 3, Special Issue 3: ICERTSD 2013, Feb 2013, pages 329-
336 )
• http://www.un.org/en/development/desa/news/population/2015-report.html
• http://esa.un.org/unpd/wpp/Publications/Files/Key_Findings_WPP_2015.pdf
• http://www.itcportal.com/media-centre/press-releases-content.aspx?id=190&type=C&news=ITC-Centre-
Gurgaon-achieves-Platinum-Rating-US-Green-Building-Council
Green Buldings by Rohit Sharma 24
A Paper on Green Building
Green Buldings by Rohit Sharma 25

Green buildings

  • 1.
  • 2.
    Green Buldings byRohit Sharma 2 Introduction- What is Green Building? Significance of Green Buildings How a Building can be Certified? Green Building Rating System (LEED) Case Study Conclusion Index
  • 3.
    What is GreenBuilding??? • Energy Efficient • Water Efficient • Better Indoor Environment • Use Environmental friendly and Sustainable materials for construction • Reduced Environmental Impact throughout the life cycle. 3Green Buldings by Rohit Sharma Conventional Green Building Sustainable Building Path… Goal…Reality… Green buildings incorporate the best ancient building approaches in logical combination with the best technological advances to address environmental issues such as Energy, Water, Material , Indoor air quality and Site. And also include recycling construction waste.
  • 4.
    Reasons for Un-sustainability •Increasing Population – The global population has been growing exponentially for the past 250 yrs. The present world population of 7.3 billion is expected to be 8.5 billion by the year 2030,in which case it would have been doubled in 30 yrs. • Urbanization – In 1800, the world had 50 cities of over 100,000 people – today there are over 1600 cities .While almost half of the world’s population is already urban. 1950 - 29.7% 2000 - 47.4% 2030 - 61.1% • Air Pollution » Increase in green house gases » Depletion of Ozone layer • Water Pollution – Only 3% of the earth’s water is fresh water that could be used for drinking, and 2/3rd of this is locked up in the polar ice caps and the glaciers. The fresh water resources are threatened by an increasing demand of the increasing population. Green Buldings by Rohit Sharma 4
  • 5.
    Reasons for Un-sustainability •Non- Renewable Resources – The main problem with these resources is the release of carbon dioxide in the atmosphere when they burn. The atmosphere at present contains 700 billion tones of carbon, which is responsible for global warming. – There is no way people of the world can use up the fossil fuel reserves without destroying the planet. Energy is the key problem to be tackled if man has to continue living on the earth. • Land – Land covers approx. 24.2% of the earth’s surface, out of which only 12% is habitable and cultivable and supports human population of about 7.3 billion. But this resource is being degraded at an alarming rate . The ratio of man to land in U.S. is 1:12 acres ; in England it is 1:1 , whereas in third world countries it is 3:1. – 15 million of additional acres of desert are created each year and 24-26 billions of top soil are lost worldwide. Green Buldings by Rohit Sharma 5
  • 6.
    Non- Buildings 60% Buildings 40% World Energy Consumption GreenBuldings by Rohit Sharma 6 Non- Building 75% Building 25% World Wood Consumption Non-Building 83% Building 17% World Water Consumption
  • 7.
    Significance of GreenBuildings… • Climate Change • Depletion of resources • Ozone depletion • Land Pollution • Water Pollution • Air Pollution Green Buldings by Rohit Sharma 7
  • 8.
    Can you guesswhich of the following has the highest contribution towards green house gas emissions? Industries Transportation Buildings Green Buldings by Rohit Sharma 8
  • 9.
    Industries 25% Transportation 32% Buildings 43% Contribution to CO2emission Green Buldings by Rohit Sharma 9 Now if we divide this 43% into residential, commercial and industrial buildings, we get the following % Residential - 21% Commercial - 17% Industrial - 5%
  • 10.
    Why to goGreen??? Green Buldings by Rohit Sharma 10
  • 11.
    How a Buildingcan be Certified? There are various green building rating system available all over the world to verify and certify green buildings- • Australia - Green Star • Brazil - AQUA/ LEED Brazil • Canada - LEED Canada/ Green Globes • China - GB Evaluation Standards for Green Buildings • Finland - PromisE • Germany - DGNB • Hong Kong - HKBEAM • India - GRIHA / LEED India • UAE - Pearl Rating System • US - LEED • UK - BREEAM (first ever green building rating system in the world) • Taiwan - EEWH • Qatar - QSAS Green Buldings by Rohit Sharma 11
  • 12.
    Green Building RatingSystem (LEED India NC) Green Buldings by Rohit Sharma 12 Category Prerequisites Credits Possible points Sustainable Sites (SS) 1 8 26 Water Efficiency (WE) 1 3 10 Energy & Atmosphere (EA) 3 6 35 Materials & Resources (MR) 1 7 15 Indoor Environmental Quality (EQ) 2 8 15 Innovation & Design Process (ID) None 2 5 Regional Priority None 1 4 Totals: 8 35 110
  • 13.
    LEED – Certification 2009LEED-NC Certification Levels Certified: 40 - 49 points Silver: 50 - 59 points Gold: 60 - 79 points Platinum: 80 points and above 13Green Buldings by Rohit Sharma
  • 14.
    Case – Study ITCGreen Centre, Gurgaon 14Green Buldings by Rohit Sharma
  • 15.
    Case – Study ITCGreen Centre, Gurgaon • Buiding: ITC Green Centre • Location: Gurgaon, India • Floor Area: 1, 70,000 Sq.Ft • Architect: Rajender Kumar & Associates, New Delhi, India www.rka.com • Significance: Platinum Rated green building • Rated by: USGBC-LEED (US Green Building Council -Leadership in Energy and Environmental Design) through CII IGBC, Hyderabad . www.igbc.in • Completion Year: 2004 • Points Scored: 52/69 Green Buldings by Rohit Sharma 15
  • 16.
    Sustainable Site • AlternativeTransportation: Parking, shower & changing facilities for bicyclists, pool cars ( A car pool is an arrangement where a group of people take turns driving each other to work) with charging facility. • Storm Water Management: Rainwater recharge pits to ensure zero discharge into municipal drainage. • Heat Island Effect: 80% underground parking. More than 75% of the terrace has been insulated and coated with the reflective high albedo (Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space.) roof paint. • Light Pollution Reduction: Minimum exterior lighting to limit night sky pollution(three main types of light pollution include glare, light trespass and skyglow.) Green Buldings by Rohit Sharma 16 Blow up
  • 17.
    Water Efficiency • WaterEfficient Landscaping: Native plants, high efficiency irrigation system and 100% recycled water for irrigation. • Innovative Waste Water Technologies: Fluidized Aerobic Bioreactors (FAB) sewage treatment plant provided. • Water Use Reduction: 40% reduction in water usage over base case. Green Buldings by Rohit Sharma 17
  • 18.
    Energy & Atmosphere •Energy: Exceeds ASHRAE 90.1 (Energy Standard for Buildings Except Low-Rise Residential Buildings) base case standards by 51%. • Envelope: External wall of 250mm thickness. Autoclaved Aerated Concrete Blocks, double glazed windows, 75mm-thick extruded polystyrene roof insulation. Extruded polystyrene (XPS) is a type of insulation material with a high R-value(The R-value is a measure of thermal resistance used in the building and construction industry), good moisture resistance, high structural strength and low weight. Extruded polystyrene is used extensively as thermal insulation in industrial, commercial and residential construction • HVAC: Chillers of COP 6.1, double skinned AHUs, VFDs [A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor], VAVs [Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system], Heat Recovery Wheel. • Hot Water: Solar thermal technology. • Ozone Depletion: All HVAC equipment are free from CFC / HCFC / Halons. Green Buldings by Rohit Sharma 18
  • 19.
    Materials and Resource •Storage and Collection of Recyclables: Separate storage bins provided at each floor level for different recyclable materials such as paper, cardboard, glass, plastic and metals. • Resource Reuse: More than 10% of the building materials are refurbished / salvaged from other sites. • Recycled Content: Fly ash based cement; Fly ash based AAC Blocks, acoustic ceiling, glass, ceramic tile, MDF (Medium density fibreboard) cabinets, etc. • Regional Materials: More than 40% of the building materials are from within 100 miles of the project site. • Rapidly Renewable Materials: Such as medium density fibre board. • Certified Wood: New woods used are certified under the Forest Stewardship Council, US. Green Buldings by Rohit Sharma 19 MDFAAC Blocks
  • 20.
    Indoor Environmental Quality •Environment Tobacco Smoke Control: Designated smoking rooms are provided at convenient locations with separate exhausts. • CO2 Monitoring: Sensors at various locations monitor CO2 levels. • Low Emitting Materials: Low VOC [Volatile organic compounds (VOCs) are organic chemicals that have a high vapour pressure at ordinary room temperature.] levels of adhesives / sealants used for carpets /composite woods / paints. • Daylight and views: Views to external glazing from at least 90% of regularly occupied areas. Green Buldings by Rohit Sharma 20
  • 21.
    Highlights of thebuilding 1. Use of glass which has 19% recycled content helped ITC to get points in recycle content. 2. Use of other recycled and recyclable resources, with materials like fly ash based cement etc. More than 10% of the building materials used are recycled, refurbished or salvaged from other sites . 3. 40% of the total raw materials used were procured within 100 miles of the project site such as double glazed glass façade and window framing, 250mm thick auto-claved and aerated concrete block wall . 4. Daylight and views: Views to external glazing from at least 90% of regularly occupied areas 5. Use of solar photo voltaic for emergency lighting . 6. Use of green material to reduce heat gain from rooftop / building envelope with high performance glazing and proper insulation material . 7. CFC/HCFC free HVAC equipment is used to combat ozone depletion. 8. Installation of solar hot water system and solar concentrator. 9. Low cost version of this idea is to paint the rooftop white or roll out gunny bags in summer . Green Buldings by Rohit Sharma 21
  • 22.
    GREEN FEATURES OFTHE BUILDING • Fly Ash based cement used • Autoclave Aerated Concrete (AAC) Blocks • Double glazed windows with low-e coating • Rain water harvesting • Water saving techniques • CFC, HCFC & Halon free air- conditioning system • Energy efficient lighting (T5 lamps with electronic ballast, high efficient luminaires) • Water efficient landscaping • Sewage treatment plant and waste water recycling. • Use of Low VOC [Volatile organic compounds ], rapidly renewable & certified materials • Eco friendly house keeping chemicals & practices • Carbon dioxide (co2) monitoring indoor chemical & pollutant source control (Dedicated copy printer room with independent exhaust) indoor air quality (iaq) system. • Optimized energy performance through efficient designs light pollution reduction ozone protection ( by using cfc, hcfc & halon free refrigerants) water use reduction storm water management • Use of recycled materials • co2 monitoring systems in AHU (operates when internal co2 is 530ppm Or more than external atmosphere)20 days flush out(testing) of entire building air prior to occupation Green Buldings by Rohit Sharma 22
  • 23.
    CONCLUSION • As thehuman population is increasing exponentially, the demand is increasing day by day, which is causing rapid depletion of resources. • Energy is the major concern if humans want to sustain on the planet in the long run. • For this human’s need to focus on the reasons for un-sustainability. • In construction field the reasons for un-sustainability can be dealt by following the path of green buildings. • Through green buildings we can decrease… – Carbon emission – Solid Waste – Water use and – Energy use • And this is how we can move towards the Sustainable buildings by decreasing their Environmental Impact. Green Buldings by Rohit Sharma 23
  • 24.
    Sources • Architectural Thesis(TH 0888), Green over Grey, Library, CEPT University. • People , Settlements , Environment and Development , UNCHS , 1992 • Maitra , A.K. Environmental Planning in India, ITPI Journal, Dec. 1993 • Towards sustainable future – Indian Architect and Builder, nov. 1992 – Herbert , Alan • By William McDonough & Michael Braungart (http://www.mbdc.com/cradle-to-cradle/c2c-framework/) • Norton John, Sustainable Architecture : A Definition , Habitat Debate Vol.5 No.2 • Energy Efficiency In Green Buildings –Indian Concept (International Journal of Emerging Technology and Advanced Engineering Volume 3, Special Issue 3: ICERTSD 2013, Feb 2013, pages 329- 336 ) • http://www.un.org/en/development/desa/news/population/2015-report.html • http://esa.un.org/unpd/wpp/Publications/Files/Key_Findings_WPP_2015.pdf • http://www.itcportal.com/media-centre/press-releases-content.aspx?id=190&type=C&news=ITC-Centre- Gurgaon-achieves-Platinum-Rating-US-Green-Building-Council Green Buldings by Rohit Sharma 24
  • 25.
    A Paper onGreen Building Green Buldings by Rohit Sharma 25