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New APU monitoring technology designed to reduce airport ground emissions


ACI World Business Partner, Assaia, has launched APU Emissions Control to reduce carbon emissions and cuts costs by detecting unwarranted Auxiliary Power Unit (APU) usage at airport gates, and delivering automated real-time alerts and reports.

A recent report commissioned by the UK’s Airport Operators Association showed that the largest part of an airport’s emissions come from aircraft on the ground, with APUs being a major contributor. However, there is currently no systematic real-time visibility of APU usage.

Max Diez, CEO of Assaia, said: “Many airports provide fixed or mobile ground power options, as well as pre-conditioned air. There is often no need to use APUs at the stand.

“However, we know they continue to be used, needlessly pumping polluting emissions into the atmosphere and racking up fuel bills. One of our customers, for example, learned that a carrier was not shutting down their APUs at all while the aircraft were on the ground. This is very avoidable.”

APU Emissions Control involves the installation of sensors at the stand, which monitor whether the APU is in use or not. That data is fed into Assaia’s artificial intelligence software, which compares it against flight information to establish if the APU usage meets or violates regulations.

The resulting information is then displayed on a desktop app and automated text messages are sent to the appropriate people, delivering immediate alerts about violations of APU usage regulations.

Assaia has already monitored over 1.5 million turnarounds at airports in North America and Europe and the software has been shown to reduce the need for APU usage by at least nine minutes per turnaround, equating to a reduction in CO2 emissions of over 13 million kilogrammes of CO2 per year for a large airport.

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