1 / 29

Energy efficient residential buildings in India

Energy efficient residential buildings in India. “International Conference on Growth with Stability in Affordable Housing Markets” 31 st January,2012 Mili Majumdar, Director Sustainable Habitat Division TERI New Delhi. Urbanization & Population Growth.

alize
Download Presentation

Energy efficient residential buildings in India

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Energy efficient residential buildings in India “International Conference on Growth with Stability in Affordable Housing Markets” 31st January,2012 Mili Majumdar, Director Sustainable Habitat Division TERI New Delhi

  2. Urbanization & Population Growth • Population of India will reach from current 1.2bn to 1.4bn by 2025 • By 2030, 40.8% (600mn) of India’s population will be living in urban areas compared to current 28.4%

  3. Urbanization & Housing Demand-Supply Dynamics Supply shortfall since post-independence (1947) In 2005, estimated demand 209.5 million, supply 189.5 million

  4. NCAER Income Group Forecasts for the top twenty cities

  5. Annual electricity consumption(611 Billion units) in India-sectoral break up:2008-09

  6. Cumulativeemissions & savings- Urbanresidentialbuildings 46% 59%

  7. Approaches to energy efficient housing • Vernacular approach to design (passive architecture, local materials, use of local labor): Low income/low cost housing and mass housing programmes of the government; certain pockets in India (Kerala and Auroville) • Adoption of Energy conservation building code in envelope design, labelled appliances for households; particularly applicable to middle and high income group housing • Green rated housing : Energy and resource efficiency looked at holistically in addition to indoor environmental quality and societal issues

  8. Use of low embodied energy technologies for housing

  9. Works of Charles Correa : Architectural expressions with dominance of natural climate control measures Orientation and shading as per solar geometry Excellent ventilation Courtyard design and use of mature tree for shading Design for daytime and nighttime use

  10. Silkworm rearing house: Bangalore Thermal comfort requirement: Chawki room: 25 to 28 deg C with 70-90% RH Rearing room: 23 to 25 deg C with 70-80% RH Non uniform heating/cooling leads to loss in 50-70% of yield

  11. Constructed solar passive silk worm rearing house Building section for silkworm rearing house

  12. Silkworm rearing being carried out in the constructed solar passive house

  13. Performance of solar passive silkworm rearing house in winter season of Bangalore

  14. Performance of the house • First rearing was carried out in the month of December. • Required temperatures for silkworm rearing is 22deg C – 24degC. • Outside ambient temperatures monitored during rearing were between 13deg C and 30deg C. • Inside the solar passive house the maintained temperatures were between 20deg C to 24deg C.

  15. Adoption of Energy conservation building code in envelope design, labelled appliances for households: Potential for energy savings and providing financial incentive

  16. Energy Efficient housing: Application of solar passive design in conjunction with select measures from the Energy Conservation Building Code • Base Case parameters • FALG brick wall with cement plaster on both sides • RCC roof • 6mm single clear glass with MS frame • Incandescent lamp, T-12 • one-star window AC in bedrooms and living room EPIbase : 152 kWh/m2/annum EPIbase : 152 kWh/m2/annum • Assumptions • People- 100% occupancy for 24 hrs • Lighting- 100% for 18hrs -22hrs • AC- Living room-12hr-20hrs • AC-Bedroom-13hr -14hr • 21hr-6hr EPIECBCenvelope : 111 kWh/m2/annum EPIrecommended case 119 kWh/m2/annum • ECBC compliant • Wall insulation • Roof insulation with reflective coating • Single glazed Window with SC compliant with ECBC • CFL, T-5 • five-star rated ACs in bedrooms and living room Payback period: 4-7 years EPIeff.light_fivestareAC : 86 kWh/m2/annum EPIeff.light_fivestareAC : 79 kWh/m2/annum • Recommended case • Wall shading • Sakora roof with reflective coating • ECBC compliant window • CFL, T-5 • five-star rated Acs in bedrooms and living room Annual energy savings: 66 kWh/m2 Annual energy savings: 73 kWH/m2

  17. The IT Toolkit entrance

  18. The assesment tool structure

  19. Savings from various ECMs

  20. Saving potential • Energy Conservation Measures – • Efficient Envelope Materials • Efficient Lighting System • Efficient AC system • Solar Hot Water System

  21. Green rating for housing

  22. Green rating for housing • GRIHA (Green Rating for Integrated Habitat Assessment) • LEED rating for homes • Ecohousing programme in city on Pune (Western India) Market driven and partly incentivised

  23. GRIHA-Green Rating for Integrated Habitat Assessment Tool to facilitate design, construction, operation of a green building ,and in turn ….measure “greenness” of a building in India What gets measured gets managed

  24. Key highlights of GRIHA Sets out guidelines for design, construction and operation Sets performances benchmarks for key resources like, energy and water Facilitates integration of traditional knowledge on architecture with present day technology Integrates all relevant Indian codes and standards (e.g NBC 2005, ECBC 2007, IS codes) Is in complete alignment with government policies and programs (e.g Environmental clearance by the MoEF: GRIHA pre certification gets fast track EIA clearance) • Building types (new constructions) • Commercial • Residential • 5 climatic zones • Hot – Dry • Warm – Humid • Composite • Temperate • Cold

  25. The Doon School Masters’ Houses Monitored indoor temperature profiles show performance nearly equal (in some cases better) than the simulation studies (>>40 Centigrade difference from conventional houses)

  26. Common wealth games village Sustainable site planning measures (compensatory afforestation, topsoil preservation, etc) Water efficient landscape by adopting native species, efficient irrigation systems and limiting turf areas. Building water consumption reduced by use of high efficiency and low-flow fixtures. Energy efficiency measures such as high performance glass, roof insulation, energy efficient lighting and variable refrigerant volume based air conditioning shall reduce the energy consumption of the apartments significantly. Solar photo voltaic system is proposed to meet the 10% of total energy requirement for internal lighting. Waste water recycling and solid waste management system are being planned.

  27. Reimbursement of rating-cum-registration fee for buildings with higher rating Incentives to architects/ design consultants Capital subsidy for SPV installations under Ministry’s scheme Promotional activities (training, awareness generation, capacity building programmes) Incentives to Urban Local Bodies First 200 Government buildings exempted from paying registration fees in advance. Incentives for GRIHA Rated Green Buildings (governmemt projects only)

  28. Conclusion • Alternative/vernacular materials and techniques need mainstreaming through market push and acceptance among developers/builders/design community • Local skill base needs enhancement • Policy impetus with enabling financial mechanisms • Standards and norms for EE in housing • Awareness and capacity building

  29. Thank you for your attention

More Related