Greenspaces Design

Key Facts

• A building project for IT/ITES office spaces including retail, hotel, medical, facilities. The purpose of the designs by Greenspace is to maximise daylight, reduce heating, regulate and reduce electricity consumption, generate solar power from roof-mounted PV modules; and make use of technologies such as geothermal cooling, LED lighting, and water conservation techniques.

• GreenSpaces is a flagship project of Asia pacific Partnership (APP), a Government partnership of seven countries i.e., USA, Canada, Australia, Japan, China, South Korea and India.
  
  It is a well connected 8.25 acre / 1.75 million ft2 Office Park (with retail, conferencing, entertainment etc areas) to be located in NCR Delhi on a Delhi Metro Rail stop.
  
  GreenSpaces will be a green community. It is projected to be the world’s greenest and most energy-efficient “A” class commercial building of over 1 million ft2, through such innovations as 100% waste and water reclamation, instrumentation and interconnection of all systems, recharging ports for electric cars, and lifestyle rules and initiatives such as ventilated chairs.
  

  Though not all elements in the complex are 'smart' systems, it is important to note the scope of the project. Components that were implemented fall in the below categories. Occupancy sensors, charging points for electric vehicles, on site power generation and metering are all important components of a comprehensive approach to greening the community.
  

  
  Power & Electricals:
  

  1. 1 MW of solar power generation from roof mounted PV modules
  2. Bio-methanation process for generation of methane from on-site waste to power fuel-cells/ cooking gas for kitchen
  3. Better stabilization of incoming  voltage through on load tap change on each transformer.
  4. Energy efficient Super T8 lamps for space lighting with digital dimmable ballasts
  5. Task lighting in office workstations with LED lamps, linked to proximity sensors
  6. 1 MW of solar power generation from roof mounted PV modules
  7. Energy metering for majority of services
  8. Very low lighting power density compared to conventional buildings
  9. Power generated shall be supplied to state grid at preferential tariff
  10. Centralized green data centre
  11. In-built redundancy for all services infrastructure
  12. Separate & dedicated distribution system for Lighting, UPS power & Raw power.
  13. Use of Copper vertical bus bars for power distribution to Offices to minimize losses and fire hazards due to cables.
  14. Redundant power supply to offices.
  15. Centralized UPS for laptop power to offices.
  16. Efficiently selection of Cables/Switchgear to reduce losses.
  17. Dual redundant distribution for Data Centre equipments.
  18. Power factor correction close to unity by utilizing advanced filters.
  19. All transformers shall have minimum no load losses as compared to conventional transformers

  
  Energy conservation:
  

  1. Insulated wall
  2. Insulated roof
  3. Fins & overhangs
  4. Lower lighting power
  5. Occupancy sensors
  6. Daylight sensors
  7. Variable frequency drives on air handling units, secondary pumps, cooling towers
  8. Chilling machines with high coefficient of performance (COP)
  9. Thermal Energy Storage system
  10. Under Floor Air Displacement System
  11. Free cooling during favorable outside conditions
  12. Pre cooling of fresh air by using dual wheel
  13. Change in operating set point at 25OC
  14. Cooling towers with approach of 1OC
  15. Solar hot water

  
  Water saving:
  

  1. Treated Waste Water for Flushing, Cooling Tower make-up and landscape
  2. Drinking water will be UV treated RO water
  3. Low flow fixtures and waterless urinals
  4. Dual flush water closets with 2/4 L for flush
  5. Solar hot water system for hot water requirement
  6. Rain water harvesting system
  7. Native/adapted landscaping thus reducing the irrigation water requirement
  8. zero discharge of waste water
  9. Terrace rain water is captured, stored and used for cleaning of basements, for car washing, site landscape irrigation etc
  10. STP - high efficiency Membrane Bio Reactor (MBR) treatment scheme based on high efficiency ultra filtration hollow fibre membranes
  11. Recycling or sale of all generated wastes

  
  Others:
  

  • Open space for landscaping with native/adaptive vegetation for reduced water needs
  • Green roofs and vertical gardens
  • Re-generative elevators for vertical transportation
  • Space for Bicycle parking, with showers and lockers
  • Green parking - Charging points for hybrid/ electric cars at car-park
• The project took 144 months to implement
• For the overall solution, the likely ROI is TERI Life Cycle Cost estimates the payback period of 6 years; project IRR estimated 29% +
• The actual (or likely) cost of the project is USD 263 mm
• The actual (or projected) savings from the project are OPEX Saving of USD 5 mm per annum
• The primary sponsor for the project was Mr. Kamal Meattle, CEO

What was the impact?

• Did you use a specific methodology or third party to calculate CO2e or KWh savings?

  TERI will calculate the CO2e/KWh savings
• 41,000,000KWh of energy have been saved on this project
• This saving will be made over 12 months

• Comments on energy savings

  There was a reduction of energy by 74% i.e >36,000 tons of Co2 per annum, as verified by TERI.

  Compared to a conventional building baseline, estimated reductions in the Greenspaces design are as follows:
  

  • UFAD + Energy Recovery: 33.5%
  • UFAD + High COP Chillers: 34.7%
  • UFAD + Airside Economizer: 31.4%
  • Reduced Lighting Power: 15.5%
  • High Performance Roof: 0.6%
  • Shading: 3.8%
    

  For more energy-use comparisons/energy conservation measures, please see uploaded document 1.

• 36,000 t CO₂e has been saved on this project , over a period of 12 months

• Comments on fuel savings

  1. We have used CNG vehicles as far as possible for transport. The petrol and diesel thus saved will be cumulated in the next 33 months of construction.

  2. We are setting up an Indian Green Building Council registered Green Home to house some of the construction workers near the project site and this will save energy

• Comments on Carbon or Energy savings

  We are working with DOE, Lawrence Berkeley National Laboratory, National Renewable Energy laboratory, Oak Ridge National Laboratory in USA and CSIR Labs in India for achieving more than 75% energy efficiency.
  
  In the overall assessment, GreenSpacesTM will be more meaningful for society as it will help demonstrate, and walk the talk, that it is possible to reduce the energy used by buildings from 40% to 10% in the world
  
• The project has independent verification for results

Making it Happen

• The following regulations or incentives allowed the business case to be more attractive

  USGBC LEED 3.0 Platinum certified, TERI ‘Griha’, & BEE 5 Star rated Building

• Barriers experienced during the initiation of the project

• Comments regarding barriers

  Government approvals are taking too much time and there is a lack in sustainable funds for such projects.

• Other comments regarding barriers preventing the successful completion of the project

  Because of the recession and a lull in the real estate segment from 2008-2009, the project was slowed down. We are still short of $ 40 million/263 million in funding and are looking for support to fill this gap.

• How were they overcome?