Comments on: Honda FCX Clarity hydrogen fuel cell car

By: Chris

Chris — Mon, 23 Aug 2010 12:28:21 +0000

Think about for a second. It’s a hydrogen fueled car. Liters are a measure of volume, not a measure of an amount of liquid.

It uses 3.5L/100km of HYDROGEN!
In this case, it is a compressed, liquefied form of Hydrogen.

By: Chris M

Chris M — Wed, 26 May 2010 00:51:04 +0000

There were some comments about the fuel economy of this car. The figures mentioned in the article are way, way off. Here’s the nitty gritty: Honda says this car will deliver 60 miles to a Kg of fuel. They say the tank holds 3.92Kg of hydrogen. The density of liquid hydrogen is 0.07Kg weight per litre. That gives us a 56L tank. The 60 miles translates to 96.56Km. The Kg of fuel used per 60 miles translates to 14.2857L. Together that translates to 14.7946L/100Km. To give you an idea, my new Hyundai Getz 1400 has used 6.8L/100Km in the 6000Km since bought new. This is of course plain old petrol.

The range per tankful works out at 378.5Km or 235 miles. Honda says 240 miles on their site.

Liquid hydrogen costs about UD$5/USGallon in California. The site I got this price from also says that translates to 1Kg of liquid hydrogen, which is just dead wrong. Petrol costs about $3 and slightly less in California per US gallon. That means, as far as fuel costs are concerned, the Honda Clarity is horrendously expensive to run. No wonder there is nothing on the Honda site about fuel cost comparison with petrol or diesel powered cars. One has to read between the lines.

By: matt

matt — Tue, 25 May 2010 13:36:37 +0000

if your that concerned, sell every luxury item you own and find a nice spot in the bush to live out your days in perfect harmony with nature.

By: kizz

kizz — Tue, 25 May 2010 13:00:35 +0000

I suppose it would a little but no more so than what is currently being emmitted by petrol cars and the effect pollution has on weather.

By: Greg

Greg — Sun, 22 Feb 2009 06:40:46 +0000

Don’t get me wrong, I’m all for alternative fuels – for reasons not the least of which, cars will not survive without them. but if there’s a million+ cars in any given city, emitting water vapor all day every day, won’t that have an effect on weather patterns?

By: slivia

slivia — Fri, 02 Jan 2009 01:55:17 +0000

they keep it as 3.5l/100km because no-one would really understand if they put it as kg/100kg or something like that.

By: Ebby

Ebby — Wed, 18 Jun 2008 23:12:58 +0000

If they are reasonably priced and you could fill them with filtered tap water, no one would buy anything else!!

By: Ebby

Ebby — Wed, 18 Jun 2008 23:10:38 +0000

I would just like to know when the average bloke in the street can get his hands on one of these? It’s about time we did something about these oil parasites holding the world to ransom!

By: TP

TP — Mon, 10 Mar 2008 07:04:32 +0000

Im not to sure about the battery setup, there is a huge usage of energy to produce them. The next task is to create non CO2 mer\thods of creating hydrogen.

By: David

David — Wed, 05 Mar 2008 03:32:24 +0000

MPG or Litres per 100km? Hydrogen is liquid above a certain pressure once this pressure is reached or exceeded, more pressure doesn’t mean more atoms in the bucket. I would logically assume the Gallons or Litres refer to the element as a liquid at the required pressure. Auto LPG is sold as liquid litres so logically hydrogen can be refered to as liquid litres as well.