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Electric Buses

Citybus to Switch Out 70% of Its Buses with Hydrogen-Powered Ones

Anela DoksoBy Anela Dokso19/07/20243 Mins Read
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Citybus, a leading public transport operator in Hong Kong, is making strides toward a greener future by testing hydrogen-powered buses. The company, serving over 1 million customers daily with a fleet of more than 1,700 buses, plans to replace 70% of its buses with hydrogen models.

Citybus is currently testing the DD12, the world’s first tri-axle hydrogen double-deck bus, co-developed with Wisdom Motor and featuring a fuel cell stack developed by Ballard-Weichai. The DD12 can accommodate 91 passengers, takes 10 minutes to refuel, and offers a range of 400-420 km. This range is competitive within the hydrogen bus industry, where models like the Toyota Sora and the Hyundai Elec City typically offer similar performance metrics.

Globally, hydrogen buses are gaining traction as cities strive to reduce emissions. Europe, particularly Germany and the Netherlands, has been at the forefront, with extensive hydrogen bus trials and deployments. For instance, Cologne’s RVK is expanding its hydrogen bus fleet to 100 units by 2023. Compared to such initiatives, Citybus’ plan to introduce five hydrogen buses for trials by December, with a long-term goal of full fleet conversion by 2045, appears ambitious but necessary for Hong Kong’s environmental goals.

A significant challenge for hydrogen bus adoption is the availability of refueling infrastructure. Citybus operates Hong Kong’s first hydrogen refueling station at its West Kowloon Depot. While this is a crucial step, expanding the refueling network will be essential for the successful deployment of a large hydrogen bus fleet. European cities often support hydrogen bus initiatives with comprehensive refueling infrastructure, a benchmark Hong Kong must consider to achieve its green transportation goals.

Hydrogen buses offer zero tailpipe emissions, a critical advantage in reducing urban air pollution. However, the environmental benefits depend on the hydrogen production method. Green hydrogen, produced using renewable energy, offers the most significant environmental gains. Citybus’ success in reducing emissions will largely depend on sourcing green hydrogen and integrating it into a broader renewable energy strategy.

Citybus is the only franchised bus company in Hong Kong with experience in operating both battery electric and hydrogen fuel cell electric double-deck buses. This positions Citybus as a regional leader in zero-emission public transport. However, to maintain this leadership, the company must address infrastructure and technological challenges, ensuring the scalability and sustainability of its hydrogen bus fleet.

Citybus aims to convert its entire fleet to zero-emission buses by 2045. Achieving this vision requires a comprehensive strategy encompassing technology adoption, infrastructure development, and policy support. Collaborations with government agencies and technology partners will be crucial in overcoming financial and operational barriers.

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