For FCEVs, hydrogen is horribly inefficient. However, for grid storage
it's much better. First, it doesn't have to be compressed, it can be
stored in inflatable tanks. Second, it can be burned in a turbine rather
than in a fuel cell. I'm not sure if that's more efficient but the
technology is simpler. So, I don't know how this would compare to
batteries, but perhaps pretty favorably, especially considering
construction costs.
Also, for those who are wary of explosions, it's my understanding that
stored hydrogen (uncompressed) won't explode. It will burn. That means
it would create a vertical plume of hot gases and not harm anything in
the vicinity on the ground. Explosions happen when you have oxygen and
fuel already mixed together.
Peri
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------ Original Message ------
From: "Willie via EV" <[email protected]>
To: [email protected]
Cc: "Willie" <[email protected]>
Sent: 01-Sep-21 08:55:45
Subject: Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant
to power utilities on how the EV mass adoption is affecting the
On 9/1/21 10:20 AM, Peri Hartman via EV wrote:
It could be that the grid can't handle any significant generation of PV energy.
If it could, economics would dictate that excess PV energy would be sold, not
shut down.
The other possibility is this will produce an incentive to create hydrogen
storage for excess PV energy. In my opinion, that's an excellent use for
electrolysis plus either hydrogen turbines or fuel cells. Note, for this
application, the hydrogen does not need to be compressed.
Speaking without great familiarity with storage costs, I think short term
battery storage is most likely to solve the problem. Battery stored energy can
get to the grid for only about a 20% loss while hydrogen, as I understand, will
be FAR less efficient.
Typically, over production of either wind or PV can be managed with storage of
well under 24 hours. We can look forward to continued battery cost reductions,
especially from Tesla.
For longer term storage, hydrogen might find a niche.
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