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Environment & Energy

Fumesucker

(45,851 posts)

3. Hydrogen isn't particularly efficent on the other end either though

Reply to DCBob (Reply #2)

Sun Jun 28, 2015, 07:34 PM

Jun 2015

Fuel cells are not that efficient, you multiply efficiencies so if you have 80% on either end your electric in to electric out is 0.8^2 = 0.64 so you are at 64% before you even start doing anything with the electricity, if your controller is 95% and your motor is 90% then it's .64*.95*.9 = ~.55 so your overall efficiency is only 55%.

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Highlight:

Invention May Make Hydrogen a Real Green Contender [View all] nationalize the fed Jun 2015 OP

Before The Celebrations Begin - Let's See If This Ever Leaves The Lab cantbeserious Jun 2015 #1

The "problem" with fuel cells is that water still needs to be converted to hydrogen first.. DCBob Jun 2015 #2

Hydrogen isn't particularly efficent on the other end either though Fumesucker Jun 2015 #3

Don't forget the energy to compress it. hunter Jun 2015 #5

It's cleaner. DCBob Jun 2015 #7

Yeah, that makes sense but if the goal is to reduce burning hydrocarbons.. DCBob Jun 2015 #6

If you are putting electricity in one end and out the other batteries are more efficient Fumesucker Jun 2015 #8

Direct Stanford Source and link to Nature Communications: hunter Jun 2015 #4

Only if the energy hydrolyzing the water is green. longship Jun 2015 #9

More information here OKIsItJustMe Jun 2015 #10