Universal Hydrogen aviation startup up predictably fails. $85 million more money down the hydrogen for transportation sinkhole.
ChatGPT & DALL-E generated panoramic image of an ATR 72 with hydrogen written on the side abandoned in a weedy field beside an airport, covered in dirt and pigeon droppings
I hadn’t bothered to do the math on this when I saw it, as it made zero sense. The only way to get enough hydrogen into an airplane for range is as liquid hydrogen and even then it isn’t very dense. Liquid hydrogen has a volumetric energy density of approximately 8.5 MJ/L, which is about a quarter of Jet A kerosene’s volumetric energy density of about 35 MJ/L.
That’s good for perhaps 2.5 hours of flight time. Take 30 minutes off of that for reserve, so two hours of flight time. Take 45 minutes off for reserve, so one and quarter hours. That’s about 625 kilometers. We’re down to an hour-long flight with two-thirds of the passengers. Are there any other concerns? Yes, expense.
The cost of manufacturing green hydrogen will be reasonable in some places where there is lots of wind, water, and solar power, under $5 per kilogram, perhaps under $3. But they are going to be a long way from airports, those costs are quite a bit higher than hydrogen made from natural gas without carbon capture, and shipping hydrogen will make up for the low costs of manufacturing the stuff. With tank cost, labor, etc.
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