I'm really liking what's coming out of the Mazda motorstables.
http://www.new-cars.com/news/040105-mazda-rx8-hydrogen-rotary-engine.html
http://www.new-cars.com/news/040105-mazda-rx8-hydrogen-rotary-engine.html
JesseJames said:I'm really liking what's coming out of the Mazda motorstables.
http://www.new-cars.com/news/040105-mazda-rx8-hydrogen-rotary-engine.html
JesseJames said:I'm really liking what's coming out of the Mazda motorstables.
http://www.new-cars.com/news/040105-mazda-rx8-hydrogen-rotary-engine.html
Dippo said:I don't think it looks that great, looks like every other Mazda out there.
wdlove said:It does look cool, but when are they going to make to make a "green" car for the older adult. Also for the vertically challenged!
wdlove said:It does look cool, but when are they going to make to make a "green" car for the older adult. Also for the vertically challenged!
Sayhey said:this is still a internal combustion engine not fuel cell technology, right? I'm assuming that hydrogen burns a lot cleaner than gasoline in such an engine, but does it still put out emissions that are harmful to the environment? If so why go this route?
zimv20 said:i don't know your height, but you might want to try a VW New Beetle. my 6'6" friend was pleasantly surprised. you can get one w/ a TDi engine (diesel). mine gets 40/55 mpg. i've gotten 60+ on the highway at times. good acceleration, too.
wdlove said:I'm 6' 8" I haven't been in one of the new VW Beetles.
Sayhey said:Excuse the ignorance from a non-engineer, but this is still a internal combustion engine not fuel cell technology, right? I'm assuming that hydrogen burns a lot cleaner than gasoline in such an engine, but does it still put out emissions that are harmful to the environment? If so why go this route?
pooky said:It is indeed a hydrogen combustion engine, which is certainly atypical as most hydrogen systems seem to be leaning toward fuel cells. Pure hydrogen combustion doesn't produce any organic or nitrogenous pollutants, though it does producea greenhouse gas (water): H2 + O2 -> H2O. It's not clear what the widespread production of water vapor would do, but it is certainly much more desireable than carbon dioxide.
Now of course, that's in an ideal system. I don't know the particulars of combusting hydrogen in an engine, so there may be other pollutants produced. Someone mentioned NOx...
pooky said:H2O.[...]Now of course, that's in an ideal system. I don't know the particulars of combusting hydrogen in an engine, so there may be other pollutants produced. Someone mentioned NOx...
agreenster said:Yes, but it runs on hydrogen, stupid. (unlike every other car out there.)
Next time, READ the article and dont just look at the pictures before posting a silly comment like that....sheesh.
Sayhey said:Excuse the ignorance from a non-engineer, but this is still a internal combustion engine not fuel cell technology, right? I'm assuming that hydrogen burns a lot cleaner than gasoline in such an engine, but does it still put out emissions that are harmful to the environment? If so why go this route?
paulwhannel said:The problem is hydrogen production, to produce serious quantity pollutes as much, or more according to some people, pollution as an internal combustion does. So the push for hydrogen cars is counterproductive, until better methods of hydrogen production are found... which could be a ways off...
paul
wdlove said:The demand accelerates for Toyota hybrid
It has left frustrated buyers and dealers across the country struggling to keep up with the public's hunger for a car whose popularity has outrun its production.
"Demand has gone through the roof," said Toyota spokesman Wade Hoyt.
http://www.boston.com/news/nation/articles/2004/03/10/the_demand_accelerates_for_toyota_hybrid/
JamesDPS said:Anyone know how power using H2 compares to petroleum fuel? I like the direction cars are going in now: clean without being an obviously different car, but the RX8 is already too slow as it is... I was excited before they came out originally, but that faded very quickly. If this isn't as powerful as the normal model, what's the point of trying to make it look like a sports car?
-Compressed H2 has less energy per unit volume than gasoline (octane)
-1kg of H2 by weight has about the same amount of energy as 1 gallon of gasoline.
2 grams of H2 is 242 kilojoule. 1 kilogram of H2 is 500*242 kilojoule, or 121 megajoules of energy.Consider again reaction 4.1, which involves only hydrogen and oxygen atoms. When one mole of hydrogen molecules (two grams) combines with half a mole of oxygen molecules (16 grams) to form one mole of water molecules (18 grams), the energy given o? turns out to be 242,000 joules, assuming that the water comes out as a gas rather than as a liquid. (If the water comes out as a liquid, then the total energy released is greater: 286,000 joules.) Since there are 500 moles of hydrogen gas in a kilogram, this means that burning a kilogram of hydrogen gas releases 500
times as much energy, or 121 million joules (again, assuming that the water comes out as a gas, as is usually the case in a combustion process).