Energy efficient building designs

Document Sample
Energy efficient building designs Powered By Docstoc
					             Energy efficient
             building designs

                        Minni Mehrotra
                  Research Associate, TERI
      Centre for Research on Sustainable Building Design

                       Minnim@teri.res.in


International training workshop on “Key vulnerabilities in small island
   developing states: scope for technology cooperation with India”

                         22-25 August, 2005
Challenges in small island
developing states

  Dependence on fossil fuels for energy production.


  Limited Natural fresh water resources


  Waste Management


  Recycling of materials - Disposal & Reuse


  Disaster Management
Impact of buildings on the
environment

   Consumers of electricity produced from fossil fuels.

   GHG emissions contribute to climate change and acid
   rain.

   Depletes land and natural resources

   Generate waste which causes land, air and water
   pollution.




                      Eco- system
                         - site selection
                         - urban design
                         - landscape planning

- CO2 emissions                                  - energy performance
- acid rain                                      - renewable energy
- ozone depletion                                - water conservation
                         Energy efficient
- rainforest depletion
                         building design
                            Criteria &           - material selection
- environmental policy       Factors             - recycling of materials
- transport strategy                             - waste management
- building maintenance                           - disposal & reuse

                         - air quality
                         - thermal comfort
                         - lighting & noise
                         - hazardous materials
Site selection and sustainable site
planning
  Site selection and development of site infrastructure to reduce
vehicular transportation and easy access to daily facilities. Site
layout with respect to wind direction and sun path.


 Appropriate erosion control mechanisms, top soil preservation,
prevent run- off from site & prevent heat island effect.


 Reduce site disruption by appropriate planning, preservation of
natural vegetation, appropriate landscaping.


 Energy efficient lighting on site including the use of renewable
energy sources for external lighting.
Teri campus at Gual pahari, a unique
experience in sustainable and energy
efficient building design…
 Minimal depletion of plant cover


 Efficient infrastructure planning


 Minimise transportation lengths


 Untouched natural habitats


 Water harvesting


 Energy efficient site lighting, solar energy based campus lighting.
Site specific guidelines for eco-
housing, Sri Lanka
Energy efficiency

      Reduction in energy demand

      Use of solar passive strategies, use of on site sources
      and sinks

      Maximise system efficiency

      Use of renewable forms of energy.



RETREAT Building, Gual Pahari, off the grid…. i.e. energy
efficient building drawing power from renewables.
Enhance system efficiency and
maximise use of renewable forms of
energy
   Use of energy efficient lighting and control devices.


   Use of low energy space conditioning systems.


   Use of renewable forms of energy e.g. wind, biomass, solar for
 thermal application and electricity generation.
   BSBE building, Kanpur
                           RETREAT, Gual Pahari




Integration of solar
water heating system,
RETREAT
Building material selection

 Maximize the use of regional/locally manufactured
   products

   Best fit options as per the climate suitability and specific
   construction requirements for that particular region

   Allow significant reduction in transportation (with delivery
   radius <100 kms) contribute to low embodied energy
   consumption and life cycle costs

 Materials with reusable & recyclable potential/Use
   industrial by products

   Use materials, which are manufactured from waste or
   recycled materials, products which can be reused
Water management


  Water quality standards and treatment required.

  Reduction of water use by efficient fixtures and fittings.

  Reduce landscape water requirement by using indigenous
  species, enhancing irrigation efficiencies, restricting water
  consuming landscaping e.g. lawns.

  Waste water treatment/recycling/reuse

  Rain water harvesting for storage/recharge
Waste management
  Appropriate waste segregation and collection

  Identify facilities for recycling of non biodegradable wastes such as
  plastics, glass and paper

  Develop decentralised treatment systems based on composting or
  anaerobic digestion process for segregated organic waste at the
  site

  Identify appropriate options for use of by products – biogas and
  manure from treated organic waste

  Develop norms for use of by products based on local standards

  Develop norms for disposal of non degradable and inert waste in
  landfills based on local standards to ensure safe environment in
  the surrounding areas
Conclusions

 Green building solutions are economically viable with
 minimal environmental footprint which can bring about
 30-40% energy savings in new buildings and 20%
 savings in existing buildings

 with reduction in…...

   demand on the fossil fuels
   emissions
   pressure on natural resources e.g. water.
   waste generation