Tag Archives: fuel cells

April 2021 in Review

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Most frightening and/or depressing story: One of the National Intelligence Council’s scenarios for 2040 involves “far-reaching changes designed to address climate change, resource depletion, and poverty following a global food catastrophe caused by climate events and environmental degradation”.

Most hopeful story: Giant tortoises reach a state of “negligible senescense” where they simply don’t age for a long time. Humans are distant relatives of giant tortoises, so maybe we can aspire to this some day. They are not invulnerable to injury and disease.

Most interesting story, that was not particularly frightening or hopeful, or perhaps was a mixture of both: Hydrogen fuel cells may finally be arriving. Not so much in the U.S., where we can’t have nice things.

are hydrogen fuel cells finally arriving?

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Not in the U.S., according to this article in Asia Times (a Hong Kong affair I don’t know a lot about), but maybe in China and Europe. Fuel cells have worked just fine on the space shuttle and on naval ships, but have not been close to competitive even with batteries for everyday vehicles. This article says that may change starting with commercial trucks. Government investment in refueling stations is a key.

Europe and Japan – Germany has declared 2021 the year of hydrogen technology – are running only slightly behind China. For the next decade or so, battery-powered passenger vehicles will dominate the market for low-carbon substitutes for the internal combustion engine. But batteries can’t power long-range freight transportation by truck and rail, and China is making a decisive commitment to hydrogen…

Already the largest market for Plug-in Energy Vehicles (PEV’s) with 3 million on the road, China projects a fleet of 50,000 fuel-cell vehicles (FCV’s) by 2025 and 1 million by 2030, from only 6,000 on the road in 2019.

Asia Times

In my utopian vision, long-range freight would be moved mostly by electrified rail, then delivered locally by small electric vehicles. Fuel cells would make sense for aircraft – much cleaner stuff than that nasty old jet fuel, and could maybe be made onsite at airports rather than shipping or piping all that toxic fuel around. They also seem attractive to me as backup generators for, say, hospitals, or any building/facility that can be solar-powered most of the time but needs a backup power source for cloudy days. Right now that often involves a tank of diesel fuel, which is a maintenance hassle at best and an environmental nightmare at worst. Small nuclear reactors, desalination plants, and fuel cells all seem to go together well to me, because you could use the excess nuclear power during low demand periods to electrolyze water, store the hydrogen in fuel cell form, and use it for peak electric demand or jet fuel or whatever you need.

hydrogen fuel cell buses

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The transportation agency serving the University of Illinois Urbana-Champaign is using fuel cell-powered buses and planning to produce and store its own hydrogen supply.

The cost of acquiring the two new buses, a fueling station and fuel storage equipment will be about $3.5 million, of which $1.5 million will be covered by federal grants…

MTD plans to produce the hydrogen for its fuel-cell buses itself. It could use solar power, wind turbines or, if need be, gas from the local landfill to separate the hydrogen from oxygen in water molecules for the buses.
The transit agency will soon be accepting bids for the equipment it will use for that conversion. It plans to add a total of 12 hydrogen fuel-cell buses by 2023, or about one-tenth of its fleet. By that time, the rest of its buses will be diesel-electric hybrids.

I’ve always thought that nuclear power, fuel cells, and membranes for water treatment would go together pretty well for a coastal city. You could size the nuclear reactor for peak demand, then use the excess energy to desalinate and electrolyze sea water whenever you are not at peak demand, storing the hydrogen to use in transportation vehicles and any other applications where you need decentralized or off-the-grid energy. You can use the membrane technology to produce drinking water and water for industry, either from seawater or treated sewage. I think you could substitute LNG for the hydrogen in this system if you need to for some reason, for example if the nuclear reactor were down for maintenance. You would have that occasional pesky problem of nuclear waste to deal with, but I am gradually coming around to the idea that managing the risks of nuclear reactors and nuclear waste may be preferable to the certainty of destroying the planet’s ecosystems and oceans. Inventing fusion power would be nice.