Free Republic
Browse · Search
News/Activism
Topics · Post Article

To: thackney
"But it will have to be different given the low heat value per volume of hydrogen."

Depends on the proposed use. What I'm basically talking about is its use as an energy storage and interconversion medium for stationary usage.

"A 5 gallon propane bottle has about 413,000 BTU heating value. To get the same energy out of hydrogen, compressed to 250 psi to use the same bottles, would take 113 of those same bottles. It just is not a practical fuel."

Yes, but for stationary use, you can easily put a 1000 gallon propane tank underground for a relatively low cost, which sort of changes the picture. For any portable use, I agree with you....unless some major breakthrough in technology appears on the scene to change the situation.

52 posted on 08/12/2011 7:57:59 AM PDT by Wonder Warthog
[ Post Reply | Private Reply | To 51 | View Replies ]


To: Wonder Warthog
I guess I don't see the stationary uses.

Hydrogen generation requires some other form of energy to make hydrogen. The hydrogen then has less energy than you started with at the same location. Why not just use what you started with as your energy source?

Perhaps for energy storage for something like wind or solar. But then you are talking about a rather significant amount energy storage and the efficiencies and volumes become a significant restriction like in transportation. Compressed air or water lift provide as good or better efficiencies and storage constraints.

The hydrogen works, I just see it as significantly less desirable than other options. It would be more cost for no gain.

54 posted on 08/12/2011 8:07:53 AM PDT by thackney (life is fragile, handle with prayer)
[ Post Reply | Private Reply | To 52 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson