Monday, September 27, 2021

Delhi Airport’s Eastern Cross Taxiway to help reduce CO2 emission by 55,000 tonnes annually

by Staff Correspondent

IADB: As per a recent assessment, India’s first-ever elevated Cross Taxiway at Delhi Airport is scheduled to be ready by December 2022. Delhi International Airport Ltd (DIAL) has completed about 60 per cent of the work on ECT. Once commissioned, the 2.1 km-long dual elevated Eastern Cross Taxiways (ECT) will not only help decongest the airport and improve circulation paths of aircraft, but also to reduce approximately 55,000 tonnes of CO2 emission annually, as envisaged.

“Environment has emerged as a major focus area in the aviation sector. We, at Delhi Airport, have taken various initiatives to improve air quality and reduce emissions. We have been constantly working towards reducing our impact on the environment. We have implemented Airport-Collaborative Decision Making (A-CDM) for airport operations and all runways operations to minimize the aircraft delay and associated emissions. We have ensured that all airside vehicles run on Compressed Natural Gas to reduce the carbon emission load,” said Mr. I Prabhakar Rao, Deputy Managing Director of GMR Group.

The 2.1 km-long dual elevated Eastern Cross Taxiways (ECT) will also help in enhancing passengers’ experience, as they will have to remain inside a plane for a much shorter duration after landing or during take-off.

At present, after landing at RWY 29/11 or to take-off from this runway, an aircraft must cover about 9 KM. During this period, passengers must remain inside the plane. After commissioning of the ECT, the aircraft taxiing distance will significantly go down (to just 2 KM) as it will taxi along the taxiway parallel to RWY 11/29 and use the ECT to take a straight path to Terminal 1 or vice-versa.

The ECT will also help airlines to save approximately 350 kg of fuel every time an aircraft uses the taxiing route provided by the ECT from RWY 29/11 to Terminal 1 and vice-versa. This would translate into a reduction of nearly 1,114 kg of CO2 emissions for each aircraft taxiing along this route. Annually, the ECT is estimated to reduce emission of approximately 55,000 tonnes of CO2 from aircraft.

“Construction of dual Eastern Cross Taxiways, the first of its kind in India, will not only reduce a significant amount of carbon emissions but also enhance passenger experience. This is another step towards our goal of becoming a Net Zero Carbon Airport by 2030. The ECT, an integral part of Delhi Airport’s Phase 3A expansion project, would make Delhi Airport future-ready. After completion of this project, the airport would be able to handle 140 million passengers per annum (MPPA),” added Rao.

In March 2021, DIAL started mounting girders of ECT across the pillars in the median of Central Spine Road. A total of 590 girders would be mounted. By the second week of July, over 200 girders have already been mounted.

DIAL has ensured that an environment-friendly approach is followed in the construction of ECT. It is using fly ash, a waste product of coal-fired power plants, in the filling material. DIAL is using around 9,715 MT of fly ash in the construction of ECT. If not used, fly ash would have been disposed in specially designed landfills which could lead to leaching of heavy metals into ground water.

The use of fly ash is recognized as an environment-friendly measure as it promotes waste reutilization and ensures that other raw materials used in construction can be reduced, thus making our construction process environment friendly.

Under Phase 3A, DIAL is also constructing 4.4-kilometre-long 4th Runway, parallel to runway 11/29 on the Southern side. Once commissioned the 4th runway would handle the increased traffic movement. Delhi Airport would become the first airport in India to have four operational runways. The 4th Runway also would help reduce Carbon emission significantly.

As part of the expansion project, DIAL is also carrying out integration of the departure and arrival terminals of T1, construction of new T1 Apron, 2.1 km-long dual elevated Eastern Cross Taxiways (ECT), landside developments for circulation and connectivity improvements and T3 modification works.

DIAL is working on the mission of “building a sustainable future”. It includes its highly ambitious plan of becoming “Net Zero Carbon Airport” by 2030. To fulfil its ambition of becoming a net zero carbon emission airport, DIAL has initiated a number of key infrastructure development projects. One of these initiatives is the development of the Eastern Cross Taxiway (ECT).

DIAL has achieved “Level 4+, Transition” accreditation under the Airport Carbon Accreditation program of ACI. Delhi Airport is the first airport in Asia Pacific and only the second airport globally. image.gif

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