Green air-conditioning is a pioneering initiative at NU which harnesses the power of nature to build a scientific, cost-effective and sustainable air-conditioning system. As an educational institution committed to sustainability development, we took a leap in working with fresh air systems. This system brought dramatic changes in our Indoor Air Quality (IAQ) and also reduced our University’s carbon footprint significantly. All hostels, offices and classrooms have greatly benefited from the fresh-air systems. Key features of the Green-Air Conditioning system are:
The use of ‘Earth Air Tunnels’ as ‘front-ends’ that ‘pre-cool’ the air in summers
Air Handling units with Chiller coils that were deployed with water for ‘Sensible’ cooling as well as ‘Air-washing’
Mounted ceiling fans in workplaces and dorms to provide ‘Wind-chill’ and comfort
Operable windows to welcome fresh outdoor air
Building design that created ‘masonry products’ to aid air distribution
Variable Frequency Drives (VFDs) and Building Management Systems (BMS) deployed to improve energy conservation
Buildings are aligned as per local architectural design parameters to provide efficient wind circulation and maximum relief from heat. Buildings, class rooms and hostels are designed to allow maximum natural light during day. Solar water heaters are used to warm water.
Nothing is wasted - all waste is recycled. Four Water Recharge wells have been constructed on the Campus for water harvesting from the run off/clean water. Sewage Treatment Plant in the Campus recycles 95% of used water. The treated recycled water is utilised for horticulture and afforestation. Waste paper is recycled through local processing units. Kitchen and food waste is recycled to produce manure. This is undertaken as project work by Biotechnology students.
Minimising Soil Erosion
The ‘sweet-crust’ of the earth, that takes centuries to stabilise and which was getting eroded by run-off water during monsoons was minimised by the construction of 14 'Check-Dams'. This also helped significantly in recharging of ground water.