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Schiphol tests eco-friendly iron flow battery for sustainable airport operations

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Schiphol tests eco-friendly iron flow battery for sustainable airport operations
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Joe Petrie Editor & Chief | AviationPros

Schiphol Airport is advancing its efforts in energy storage and electrification of ground equipment with the introduction of an Iron Flow Battery. This large battery, installed on the A/B apron, aims to provide a steady power supply for charging electrical equipment, thereby easing the demand on the grid.

The battery will undergo extensive testing over the next few months. During this period, it will power electric ground power units (e-GPUs) on the A/B apron. These e-GPUs supply electricity to parked aircraft at locations lacking a fixed power source. When used alongside a preconditioned air unit (PCA), which provides fresh air onboard, aircraft can keep their auxiliary engines off while grounded. This results in improved air quality and reduced noise levels on the apron.

Notably, the Iron Flow Battery uses natural components such as iron and salt water instead of lithium, making it environmentally friendly and fire safe. The battery's capacity remains stable for up to 20 years.

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"I am extremely proud of this innovation," said Sybren Hahn, executive director Infrastructure at Schiphol. "The Iron Flow Battery is a great example of how we as an airport want to lead the way with innovative infrastructure that improves the quality of work. During the test period, the focus is on user-friendliness, reliability and efficiency. If the result is successful, more batteries will follow, with the aim of making all ground equipment emission-free and electric."

The development of this battery was undertaken by ESS Inc., based in Oregon, USA. Schiphol's innovation team facilitated its introduction at the airport. Management and usage responsibilities are handled by Volker Infra and KES. The project receives partial funding from the EU under TULIPS—a European initiative involving 32 aviation entities led by Royal Schiphol Group—aiming to speed up sustainable innovations at airports.

This aligns with Schiphol's goals to make its operations emission-free and waste-free by 2030 and achieve energy positivity by 2050.

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