Energy Efficiency in Green Building

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A SEMINAR ONEFFICIENT ENERGY USAGE IN GREEN
BUILDING

• Presented By
• SUNIL.H.G
• Under the Guidance of
• Mr. B.HEMENTHA PRABHU Mr.
  MITHUN.B.M
• Prof. Head,
  Lecturer,
• Civil Dept.
  Civil Dept.

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CONTENTS

• Introduction
• Efficient Energy Use
• Insulation
• Day Light
• Glazing
• Fixed Protections
• Sky-Light
• Important Parameters in Day Light Design
• Summary
• References

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Efficient Energy Use

• Efficient Energy Use, sometimes simply
  called Energy Efficiency, is using less energy to
  provide the same level of energy service. An
  example would be insulating a home to use less
  heating and cooling energy to achieve the same
  temperature. Another example would be installing
  Fluorescent light and/or Skylights instead of
  Incandescent lights to attain the same level of
  illumination. Efficient Energy Use is achieved
  primarily by means of a more efficient technology
  or process.
• Energy Efficiency in buildings is the
  quickest, most cost-effective and environmentally
  friendly way to extend energy supplies and manage
  your energy use.

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• Insulation

• Insulation of attic, walls, floors, basement
• Insulation works by slowing down the movement
  of
• heat from a hot space to a cooler space.
• Insulating Areas

Cool Roof Treatments
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Cool Roofs
A Roofing System that can deliver
High Solar Reflectance (the ability to reflect
the visible, infrared and ultraviolet
wave-lengths of the sun, reducing heat transfer
to the building) and High Thermal Emmittance (the
ability to release a large percentage of absorbed
or non-reflected solar energy) is a Cool Roof.
Most Cool Roofs are white or other light colors.
The Albedo of several types of roofs
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• Types of Cool Roofs

• Inherently Cool Roofs
• White vinyl roofs
• Reflect gt80 percent of the suns rays
• Emit gt70 of the solar radiation
• Asphalt roofs
• Reflect 6 - 26 of solar radiation
• Coated Roofs
• White paint based products
• Hyperglass Rubber Roof Coating
• Hyperglass Rubber Roof Finishing Top Coat

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• Green Roofs

• Reduce city Heat Island effect
• Reduce CO2 impact
• Reduce summer air conditioning costs
• Reduce winter heat demand
• Potentially lengthen roof-life 2 to 3 times
• Treat nitrogen pollution in rain
• Negate acid rain effect s

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• Thermal Insulation (Insulating Tiles)

Tiles with polymer coating
Tiles without polymer coating
Size of roofing Tile (i) 250 x 250 x 38 mm to 40 mm -- without toping(ii)250 x 250 x 63 mm to 63 mm -- with toping(which preserve its original colours)
Bulk Density 0.085 gm/cm3
Thermal Conductivity 0.098-0.120 W/mK (at 50 C)
Flexural Strength 3.00 N/mm2
Compressive Strength 3.50 N/mm2
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• THERMAL INSULATION

1. Batt Insulation (Glass and Mineral Wool)
2. Board Insulation (Polyurethane, Polyisocyanurate,
   Polystyrene, Cellulose)
3. Blown-In Insulation (Cellulose, Fiberglass)
4. Poured-In Insulation (Perlite, Vermiculite)
5. Foamed-In Insulation (Polyurethane,
   Polyisocyanurate, Polyicynene)

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• THERMAL INSULATION PRODUCTS AND PROPERTIES

Product Primary Form Cost / sq.ft. / R (materials labor) Thermal resistance (R- value per inch) Raw Materials Known Health Issues Fire Retardant Water Resistant Expected product life (years) Embodied Energy (BTU) for R-20
Fiberglass Batt 1.342 3.2 Silica sand limestone boron binder (PF or acrylic) (20-30 recycled glass) Can irritate and congest lungs during installation NA No 15 4,500
Mineral Wool Batt 1.342 4.0 75 iron ore blast furnace slag 25 minerals (usually basalt) PF binder Can irritate and congest lungs during installation NA No 15 2,980
Cellulose Loose Fill 0.8947 3.7 80 paper 20 flame retardant (usually post-consumer newspapers) CO in Smoke 20 sodium borate No 15 600
Extruded Polystyrene (XPS) Board 6.2629 5.0 Ethylene (petroleum / nat gas) benzene blowing agent (HCFC) 15 recycled XPS CO in Smoke, Carcinogenic Fire Retardants, benzene 0.7 HBCD Yes 10-15 18,000
Expanded Polystyrene (EPS) Board 5.8155 3.85 Ethylene (petroleum / nat gas) benzene blowing agent (pentane) 60 recycled EPS CO in Smoke, Carcinogenic Fire Retardants, benzene 2.5 HBCD Yes 15 18,000
Polyisocyanurate Board 4.0261 6.5 Ethylene (petroleum / nat gas) benzene blowing agent (pentane) 10 recycled polyiso CO in Smoke, Toxic Fire Retardants 5-10 TCPP Yes 15-30 14,300
Polyurethane Foamed-on NA 3.6-5.0 Ethylene (petroleum / nat gas) benzene blowing agent (HFC) 25 soy oil Toxic during installation, CO in Smoke ? TCPP Yes 15-30 NA
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• Thermo-shield technology

Waterproof thermo-shield paint is produced from
vacuum microspheres that have very low thermal
conductivity, and water resistant acrylic resin
that has good weather resistant properties, along
with other additives
Roof treatment at ITC Muktheshwar
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A comparison of insulated wall vs ordinary
walls The regions of blue colors in the
Thermogram indicate that the differences between
the room-temperatures and the outside
temperatures are lesser. This is a passive
technique for heat control.
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• Advance Glazing

• Low emissivity (low-e) glass
• Polymers are used instead of glass in some
  applications, such as translucent glazing and
  skylights.
• Single glazing offers little resistance to the
  passage of heat.
• Double-glazing offers much better insulation
• For best performance, solar control glass should
  be used for the outer pane and low emissivity
  glass for the inner pane
• A low cost alternative to conventional
  double-glazing is to use a thin, flexible,
  transparent polyethylene membrane in place of the
  inner pane of glass

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• Fixed protections

Shading devices should be sized using the above
graphic method.
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• Skylights

Atrium space with Skylight

• Skylights can make a major contribution to energy
  efficiency and comfort in new and retrofit
  low-rise buildings. Daylight is an excellent
  source of cool light and the right size of
  skylight admits just enough light and no more
• A skylight can admit over three times as much
  light as a vertical window of the same size.

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• IMPORTANT PARAMETERS IN DAY LIGHT DESIGN

• Room size and finish
• Angular size and finish of external obstructions
• Size, position and distribution of windows and
  overall transmittance of windows.
• Maximize daylighting, but avoid glare
• Maximize solar gains in winter, protection from
  solar gains in the summer and fall

The USPS 8th Avenue Post Office, Ft. Worth,Texas
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Summary

• This work focuses on providing fundamental
  information and review on Efficient Energy Usage
  in Green Building approaches in building
  construction, focusing on lighting requirements,
  effect of shading devices and Sky-Lighting.
• This Report outlines the solutions for the Energy
  Efficient Futuristic Buildings.

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References

• Website Resources
• Building America www.eere.energy.gov/buildings/bu
  ilding_america
• http//en.wikipedia.org/wiki/Lighting
• http//www.coolshadows.com/ideas_and_answers/case_
  studies/2008/8/10/kirkwood_development/overview.go
  
• The Green Building Institute www.thegbi.org
• http//en.wikipedia.org/wiki/Leadership_in_Energy_
  and_Environmental_Design
• www.igbc.in
• http//www.igbc.in/index.php?optioncom_contentta
  skviewid76

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Thank you