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The Hydrogen Cars Technology

womenser submitted on 1/19/2009 Official Bell & Ross Timestamp: 3:22:22 AM

6 user comments | Category: New Cars | Source: | SOURCE: carwad.net

Hydrogen cars may be a great idea in the future, but they’re not economically viable right now.

Hydrogen cars are not a solution right now, but they will be. Twenty years ago people said hybrid cars were not worth persuing. Hydrogen cars drive and feel the same like a normal vehicle, even with added load as a result of hydrogen fuel tank. BMW Hydrogen 7 is another example of hydrogen fuel cell technology

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The Hydrogen Cars Technology

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womenser

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downtoearth

The hydrogen myth not yet dead? o_O H2 cannot be transported over long distances so the only option is to generate in at hugely expensive charging stations that haven't been built yet by means of electrolysis, using a bucket of electricity. Say efficiency = 60% = 0,6 Then you pour it into a hugely expensive car tank that has not yet been built and transform in into electricity again in a hugely expensive fuel cell that has not yet been built. Say efficiency ~60% = 0,6 (not accounting leaking - yes, hydrogen particles being the smallest ones do leak if not bound chemically just from any container). So the overall efficiency is 0,6*0,6 = 0,36 = 36% Impressive! And the car still has no battery to perform regenerative braking. ||| Meanwhile, you take a plug-in hybrid. Chinese have already started mass-producing one (BYD F3DM) for 22000 USD, with a battery covering ~60 miles to handle 95% of distances people drive on daily basis, promising massive battery life. Regenerative braking comes naturally. Overall charge-discharge-generate-power cycle for a battery and an electric motor is 80%. So instead of wasting 64% of your bucket of electricity, you just waste 20%. Instead of having to use massively pricey technology that does not exist, you use cheap one that's right here right now. Good luck with hydrogen then, which was the fuel of the future 20 years ago, is now and remain the fuel of the future in 20 years as well. Even if fuel cell cars owners farted hydrogen, it still wouldn't work.

— downtoearth (View Profile)

Posted on 1/19/2009 2:37:12 PM | reply to this comment | Votes: 0   

huu76

I haven't read the article but it doesn't sound like a very good article to me.

"BMW Hydrogen 7 is another example of hydrogen fuel cell technology"

Can anyone tell me what's wrong with this sentence?

Is this an honest mistake or is the guy clueless or just trying to give BMW some undeserved credit?

— huu76 (View Profile)

Posted on 1/19/2009 9:31:56 PM | reply to this comment | Votes: 2   

downtoearth

We assume by default that motoring journalists know what they're writing about. This assumption fails to meet reality far too often.

— downtoearth (View Profile)

Posted on 1/20/2009 6:05:39 AM | | Votes: 1   

kevinhydro

The BMW Hydrogen 7 is not a fuel cell vehicle as the writer indicates. The BMW Hydrogen 7 is a dual fuel gasoline or hydrogen vehicle that can switch from one to the other at the press of a button. I've driven this car twice.

I’ve left additional comments at the bottom of the original article.

— kevinhydro (View Profile)

Posted on 1/21/2009 11:38:28 AM | reply to this comment | Votes: 1   

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