It is well known that ‘Green Buildings’ are environmentally efficient buildings. In India, a building is certified as a Green Building by the Indian Green Building Council (IGBC). Hitherto, there was no norm available that could certify a Mass Rapid Transit System (MRTS) to be green or otherwise. In order to develop a rating system applicable to all metros, DMRC and IGBC joined hands and came up with a Green Certification norm for the very first time in the world, for rating a MRTS to Green Standards. This MRTS Rating System was launched by IGBC on 4th September 2014 exclusively for Green certification of Metro System.
All the upcoming Metro stations under the Delhi Metro as part of its third phase are designed and being constructed as ‘green buildings’ with specific provisions for the conservation of energy as well as better CO2 saving, water saving and waste management arrangements. These station buildings shall have following specific features.
Reduced Heat Island Effect: Heat Island Effect contributes in increasing temperature of the microclimate of the building and reduced energy efficiency of a building. To reduce this effect, the roofs of the stations will be either finished with high reflective materials or/and landscaped with vegetation.
Landscape Plant Species: The plant species used for the landscaping (wherever possible) of the stations will be either native or adaptive. These consume less water and help in increased water efficiency of the building.
Insulated Building Envelope: To reduce heat gains in the stations and improve energy efficiency, the walls, roof and windows in the building will be insulated. Insulated building envelope also helps in improving indoor thermal comfort for occupants.
Adequate Fresh Air:To prevent Sick Building Syndrome and other adverse health effects, the Metro stations are being designed to provide adequate fresh air as per ASHRAE 62.1-2004 through ventilation system. Fresh air also improves productivity of the occupants in the building.
Low VOC Paints: VOC are chemicals, which exist in paints, adhesives, sealants etc and produce bad odour. These VOC also impact on the health of occupants if subjected for long durations. To reduce the adverse health effect and improve quality of indoor air, only Low VOC paints, adhesives and sealants are being used in the buildings.
Water Efficient Fixtures: Low water consuming fixtures like Dual-flush WC, low flow taps etc will be installed at the stations. These fixtures help reduce water consumption in the building without compromising on the occupants water requirements.
Energy Efficient Equipments: All the lift and escalators are equipped with Variable Voltage Variable Frequency drives which consume less energy compared to conventional lift & escalators. 35% reduction in Lighting Power Density over the baseline has been achieved by using efficient lighting system such as LED. Coefficient of Performance of air conditioning system i.e. Variable Refrigerant Volume system is 38% efficient than the baseline of ASHARAE. All the elevated stations are powered with solar energy. The installed capacity of solar panels is 1.5 MWp.
Indian Green Building Council has conferred Platinum rating to 100 metro stations, 5 Receiving Sub-stations (RSS) and DMRC Residential Societies for adopting green building initiatives like use of solar power, energy efficient equipments, Rain water harvesting structures etc. . U.S. Green Building Council has conferred PEER (Performance Excellence in Electricity Renewal) Gold rating to Line-3 & 4 and Line 5 of DMRC which measures and improves power system performance and electricity infrastructure..
Green Building Certification