Thanks for the insight Disco.
Overcoming doubts
Although hydrogen could meet 18% of the world’s final energy demands by 2050, according to the Hydrogen Council, it’s progress as a zero-emissions solution has suffered due to a lack of information and misconceptions.
“The biggest issues with hydrogen are a lack of available fuel, the cost and the volume that it takes up onboard a ship,” says MacLaine. Additionally, how to produce sufficient amounts of the gas remains a major concern. Production through natural gas reforming is currently the most popular and cheapest option, however, it has a substantial carbon footprint. But ZEM-Tech is designing a solution to get around these hurdles: a zero-fuel ship. “What we mean by zero-fuel is that it’s a ship that doesn’t necessarily need to bunker. And the way it does that is that it produces its own fuel while underway through energy recuperation.”
To achieve this, the company plans on using onboard electrolysis. The vessel will use wind as a means of propulsion and as a direct renewable. The excess energy produced will be captured and stored in batteries and then as hydrogen using proton exchange membrane (PEM) electrolysis, which will later generate electrical power for propulsion or hotel load. “When you start pulling together all these different zero-emission technology options, you start seeing the possibilities and how all these things can work together.”
The technology to do this, MacLaine says, already exists. “We have a marinized electrolyser, it’s just not to scale, and we have electrolysers to scale but they’re just not marinized.” ZEM-Tech is collaborating with various clients to design a full spectrum of zero-fuel ships and MacLaine believes “that we will have the technology to design a zero-fuel VLCC from 2023.
What’s the biggest holdup in evolving this concept? MacLaine believes it’s regulation and investment into research and development. “Regulation will trigger investment, which will bring in the money required to bring things up to an economy of scale. If you just sprinkle a little bit of funding on that those innovations will grow until they’re the sized required.”
https://www.rina.org.uk/Demystifying_zero-emission_ships.html
Zero Emissions Here, Now, Today
https://theicct.org/sites/default/files/5_MacLaine_ZEVs_today.pdf
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