That's annoying!27 Sep 2021 15:04
I bought in this morning, and it's gone from blue to red... However, glad to be in here, hopefully for the long term.
Baillie Gifford's quarterly mag, Trust, has an article by the manager of Edinburgh Worldwide on the hydrogen economy. https://magazinebailliegifford.com/trust43/fueling-the-future/
A couple of quotes:
“We see societal recognition that global warming is real and must be dealt with, there is genuine buy-in to net zero carbon commitments, as well as growing political backing for hydrogen. This is happening as renewable energy costs have fallen significantly and hydrogen-based technologies have matured. The ingredients for change are now in place as never before,”
“There are several green electrochemical cell technologies that either use hydrogen in a fuel cell to create electricity, or, when run in reverse in an electrolyser, to convert electricity into hydrogen,” explains Brodie. He cites the two most promising competing technologies as solid oxide cells and PEM, or polymer electrolyte membrane. Solid oxide cells run at high temperatures, can also use other fuels besides hydrogen and have a wider range of industrial applications, especially where waste heat can be used. PEM doesn’t require such high temperatures. It is less efficient but can be more responsive to sudden demand, making it suitable for pumps dispensing hydrogen on demand, or for converting and storing excess renewable energy to ‘balance the grid’ at times of plentiful electricity supply but low demand.
“Each side will argue its own technology is better, but functionally they are the same, in that they both react hydrogen with oxygen to release electrons. The only byproduct is clean water, and this equation is simply reversed in an electrolyser,” says Brodie. “We’re interested in companies with a key enabling technology that will allow them to go into lots of different areas.” Brodie has selected two UK companies he considers “real players” in a crowded landscape of competing technologies...
The trust also has a longstanding holding in Ceres Power, whose solid oxide fuel cell technology Brodie considers to be both efficient and flexible. Ceres has also established useful technology-sharing partnerships with global industrial and transportation giants such as Bosch, Doosan and Weichai.
“Ceres has found a way to run solid oxide fuel cells at a substantially lower temperature of some 550C (1,022F) as opposed to the more usual 800C (1,472F). Because they can operate at lower temperatures, they can use lower-cost materials, such as steel and ceramics, which simplifies the manufacturing process and offers scalability potential to both fuel cells and electrolysers based on this technology,” Brodie notes.
In addition, Ceres’ technology is among the most efficient ways to generate power from any fuel, whether low or zero carbon, and its method of depositing the functional aspects of the cells through ceramic ‘ink’ in its SteelCell stacks....SEE LINK
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