Hydrogen Fuel Cells – Powering the Future of Short-sea Shipping

When it comes to the environmental impact of maritime shipping, the focus usually falls on the massive cargo ships sailing across the high seas. Much less talked about, however, is the impact of smaller vessels such as ferries and coastal freighters; these also contribute a non-negligible amount of greenhouse gas emissions.

As the demand for green alternatives to diesel power continues to grow, hydrogen fuel cells have begun to emerge as one of the more promising solutions. Many factors enable them to offer a more sustainable way to power short-sea shipping, and if adopted en masse, they could very well reshape the future of the industry itself. Let’s take a look.

Why Short-Sea Shipping Needs to Change

Short-sea shipping covers trips along coastlines and between nearby ports. It encompasses nearly 60% of all maritime freight in Europe alone, underlining its significance within the shipping industry. Many of these ships still rely heavily on greenhouse gas-producing diesel engines.

It’s about time for the industry to change. Firstly, theInternational Maritime Organization (IMO) is setting goals to cut shipping emissions by 50% by 2050 — a mere 25 years away. Secondly, diesel engine emissions from short-sea shipping vessels also affect the air quality of coastal communities, which may result in operators falling foul of tougher rules to limit air pollution.

Operators can no longer afford to turn a blind eye to sustainable alternatives. Finding cleaner fuels isn’t just good for the planet — it’s also necessary to stay competitive and compliant.

What Are Hydrogen Fuel Cells?

Hydrogen fuel cells are devices that generate electricity via an electrochemical reaction between hydrogen and oxygen, with water vapour as the only byproduct.

Unlike common diesel engines, hydrogen fuel cells operate without releasing carbon dioxide or other pollutants, which is why they are often described as a “zero-emission” technology. This makes them an ideal candidate for shipping operators looking to reduce their carbon footprint.

How They Work on Ships

To power a vessel, hydrogen fuel cells need a steady supply of hydrogen, which can be stored as a compressed hydrogen storage system or in cryogenic tanks kept at very low temperatures.

Here’s what happens on board:

Storage: Hydrogen is kept in specially designed tanks that maintain the right pressure or temperature.
Conversion: When the ship needs power, hydrogen flows into the fuel cell to react with oxygen drawn from the air.
Electricity Generation: This reaction produces electricity to drive the engine and run equipment throughout the vessel.
Clean Output: Water vapour (the only byproduct) is released safely into the atmosphere.

Compared to traditional engines, fuel cells are quieter, more efficient, and don’t create exhaust fumes, improving conditions for both crews and the environment.

Why They’re a Good Fit for Coastal Ships

For new technology, it makes a lot of sense to test it on a small scale before committing fully to it. That’s why smaller short-sea shipping vessels, which run short trips or stay close to shore, are great for testing hydrogen fuel cells. The way these boats work makes it easier to change from diesel to cleaner power without much hassle, mainly due to:

Predictable Schedules: Ferries and small cargo ships usually run the same routes on set timetables. Since it’s clear when and where they’ll be docked, refuelling and maintenance are much simpler.

Shorter Distances: Shorter travels mean less hydrogen needed, which makes storing fuel onboard more manageable and avoids taking up too much space.

Frequent Stops: Most coastal ships dock often, sometimes a few times daily. That means crews have plenty of chances to refuel and keep an eye on the systems.

Modular Systems: Hydrogen fuel cells and their storage setups are quite flexible. They can often be retrofitted onto existing ships instead of requiring a completely new build. Operators can start with a smaller installation and scale it up later if it proves useful or as more fuelling stations become available.

All of this makes hydrogen fuel cells a good fit for short-sea shipping. They offer a cleaner way to keep people and goods moving without the massive redesigns that big ocean-going vessels often need.

Early Examples Already in Use

This isn’t just a theory. Several projects are already putting hydrogen fuel cells into practice. In Norway, for instance, Norled’s MF Hydra ferry has started carrying passengers using hydrogen fuel cells and compressed storage. It can hold up to 300 passengers and 80 vehicles, all while emitting nothing but water vapour.

Other pilot projects are underway in France, Belgium, and Japan. These early efforts are helping to prove that hydrogen can work safely and reliably on real routes.

A Cleaner Future on the Water

Switching to hydrogen fuel cells isn’t some far-off concept, but already underway on ships that carry everyday cargo and passengers. As more operators adopt this technology, short-sea shipping could show what’s possible when clean energy meets practical transport needs.

Should these early experiments prove successful in the long term, it would be a step forward for hydrogen fuel cells and cement their potential to transform the maritime industry. In time, they could very well pave the way for a future where shipping stays vital but becomes much more sustainable.