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Global Warming is a Hoax

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What do you think?
Global Warming is a hoax
7%
 7%  [ 5 ]
It's real, but is mostly natural
25%
 25%  [ 17 ]
It's real, and is mostly affected by man
59%
 59%  [ 39 ]
Ooh look, a brown dog outside my window...
7%
 7%  [ 5 ]
Total Votes : 66

dr.bob
1350737.  Wed Jun 17, 2020 6:02 am Reply with quote

More interest will certainly result in reduced prices. However, as far as I'm aware, the problems with hydrogen fuel cells aren't solely limited to the price.

According to this article, storing hydrogen as a gas is expensive and energy intensive thereby hugely reducing the efficiency of the process. Hydrogen is also the smallest molecule there is, making it very easy for it to escape confinement. I've heard reports that if you leave a hydrogen-powered car on your driveway for an extended period of time, you're likely to return and find your "fuel tank" empty. This is not a problem that affects petrol/diesel powered cars, or battery powered EVs.

The article also points out that regulating temperatures is vital for a hydrogen fuel cell, making it more difficult to operate in extreme cold or heat. It concludes that, while fuel cells have several advantages, they won't be a viable power source for cars until many of the problems have been ironed out.

Another article refers to a report compiled by management consultancy Horváth & Partners, which looked at the energy efficiency of battery-powered EVs compared to Hydrogen fuel cell cars.

Since he mentioned it before, PDR might be interested to read their figures for energy loss when charging and using an EV (they claim 8% of the electricity is lost in transmission from the source to the car's battery pack, while 18% of what remains is lost between the battery pack and the drive wheels, though how variable those figures are I don't know). The same study found that producing, storing, and transporting hydrogen resulted in a loss of more than 65% of the energy used to make it.

This study has been viewed by Volkswagen as sufficiently convincing that they have chosen to focus their research efforts into pursuing battery technology rather than fuel-cells. However, other car manufacturers disagree. The article states that Honda, Hyundai, and Toyota are all developing fuel cells. However, all three seem to be focussing a lot of effort on developing commercial vehicles rather than cars. This makes sense since a vehicle that's in constant use would at least avoid the problem of having their fuel evaporating while left unused for a while. I guess ultimately time will tell.

So, in short, while the technology "is there", it still needs work. And while it may remove the “inconvenience” around filling up times, it does appear to introduce a bunch of other “inconveniences” which would be similarly unpalatable to the average private car owner.

 
vlatimiro
1392379.  Tue Oct 12, 2021 4:13 am Reply with quote

Global warming is not a scam. It is a scam to require other countries to limit carbon emissions on the grounds of global warming to limit the increase in GDP of other countries, and even the inexplicable tax collection of carbon taxes is a scam.


Spammy link removed

 
Jenny
1392397.  Tue Oct 12, 2021 9:09 am Reply with quote

Hi vlatimiro. Would you care to defend that particular assertion without the aid of a spammy link?

 
Alexander Howard
1392415.  Tue Oct 12, 2021 11:38 am Reply with quote

Maybe it is along the lines "We in Britain, Western Europe and North America launched the Industrial Revolution with steam power, burning coal to drive industry, turning our skies black to turn our cities into gold, then we invented new machines burning oil to drive the next stage of the revolution, and out of those fires we have made ourselves richer than ever imagination could reach. Now these petty countries, those which we found crawling on their bellies barely in the Iron Age when we met them, they too want riches? They must be kept in their place."

That is not what Westerners actually think, but it must look very much like that from the outside - denying poorer peoples the very means by which we became wealthy and calling it progress.

 
suze
1392437.  Tue Oct 12, 2021 4:44 pm Reply with quote

It is rather what Donald Trump thinks, and he is definitely of the Western world.

 

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