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Environment & Energy
In reply to the discussion: Hydrogen Hype is Dying, And That's a Good Thing [View all]progree
(11,493 posts)14. And I include my response to clarify what that citation is about. Because that citation, calling it a "delivery system"
is confusing at best, as I don't consider a power plant as a "delivery system" although yeah, I understand one can say it is delivering the energy in a lump of coal or uranium pebble to a customer's meter . And readers of that citation wouldn't know that a thermal power plant is being compared to unless they looked it up, or unless you also included some of the next 2 or 3 paragraphs
Generation
It is estimated that of the 65% of primary energy lost, 59% of it is lost in the generation process. This includes:
Transmission and distribution grid
Another 5 to 7% of the original primary energy is lost during the delivery of electricity through the T&D system. The energy becomes waste heat released in the air due to line losses and conversion losses in transformers and other line equipment.
It is estimated that of the 65% of primary energy lost, 59% of it is lost in the generation process. This includes:
Waste heat occurring due to inefficiencies in the process of converting primary energy to electricity. This makes up about 54% of the primary energy lost.
Electricity used internally by the power plant during operations. This makes up about 5% of the primary energy lost.
Transmission and distribution grid
Another 5 to 7% of the original primary energy is lost during the delivery of electricity through the T&D system. The energy becomes waste heat released in the air due to line losses and conversion losses in transformers and other line equipment.
From your #3
..nor any mention of the inefficiency of our current electrical distribution systems..
(all emphasis added by progree)
"Losses of electricity through the delivery system are significant. The U.S. Energy Information Administration (EIA) estimates that losses through the delivery system are 65%. Another way of saying this is that nearly two-thirds of the primary energy used to create electricity is lost before the electricity arrives at the customer meter." - https://energyknowledgebase.com/topics/electricity-losses.asp
What I consider a "delivery system" is the transmission and distribution system. In the above citation, it says 5 to 7%. At Xcel, it was more like 10%. And no professional in the field considers an "electrical distribution system" to include the power plant, since what the power plant is doing is converting the energy in fuel into electricity, not distributing it.
I see nothing wrong with a physicist or anyone else calling out the "optimistically 40%" efficiency of the storage system (I'll admit I don't know if she backs that up without looking at the video again, or the YouTube discussion, but it comports with other things I've read and seen unchallenged here). And note that a hydrogen storage system does not produce electricity -- it takes electricity that was already produced by other means, and then regurgitate it with about 65% losses To me, that's something I want to know about. Just like I want to know that a battery storage system is about 80% efficient.
I am not anti-hydrogen. After I took the time to watch the video, I just wanted to summarize the video to save my fellow progressives some time in deciding whether to watch it or not. I'm just trying to f'ing learn and understand, not to trash or extol one technology over another (at least not in this thread). Exception: trashing fossil fuel.
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Video is about 5:30 m:s long (everything after that is an ad for brilliant so can skip).
progree
Jan 5
#2
Yeah, no mention of the fact that the materials used in containing H2 are impervious to embrittlement...
Think. Again.
Jan 5
#3
59 percentage points of that 65% is loss at the thermal power plant producing thermal power plant electricity
progree
Jan 5
#5
The reason I bring up the thermal power plant at all is because your citation from energyknowledgebase
progree
Jan 5
#9
I use that citiation specifically to counter the position that Hydrogen is an inefficient way to produce electricity....
Think. Again.
Jan 5
#11
And I include my response to clarify what that citation is about. Because that citation, calling it a "delivery system"
progree
Jan 5
#14
I would gladly show you my own credentials in ecology, but, it's the internet.
Think. Again.
Jan 5
#12