Hydrogen power as an engine instead of a fuel cell?

[Ultima]

Would it make more sense?
Converting a rotary engine

I read that Mazda is also trying hydrogen out with their rotary engines and is having more success than with their electric projects.

 

[Eli]

The problem is the big tanks that would be needed...

Just imagine, car accidents would level whole blocks....

 

[Evadman]

Originally posted by: Eli
The problem is the big tanks that would be needed...

yes. hydrogen has mcuh less energy per unit weight than gasoline.

Just imagine, car accidents would level whole blocks....

um... No.

 

[wnied]

Hydrogen power as an engine instead of a fuel cell?

Sure why not? Look how well it worked for the Hindenburg.

~wnied~

 

[Eli]

Originally posted by: Evadman

Originally posted by: Eli
The problem is the big tanks that would be needed...

yes. hydrogen has mcuh less energy per unit weight than gasoline.

Just imagine, car accidents would level whole blocks....

um... No.

Correct me if I'm wrong, but doesen't big tank of hydrogen + rupture = boom? lol..

By the way, according to this page.. Hydrogen has an energy density of 33kWh/kg, and gasoline only has an energy density of 12.3kWh/kg. I can't find any other pages to confirm this though..

 

[CallTheFBI]

Originally posted by: Eli

Originally posted by: Evadman

Originally posted by: Eli
The problem is the big tanks that would be needed...

yes. hydrogen has mcuh less energy per unit weight than gasoline.

Just imagine, car accidents would level whole blocks....

um... No.

Correct me if I'm wrong, but doesen't big tank of hydrogen + rupture = boom? lol..

It has less energy per unit weight but internal combustion engines only have an efficiency of about 40%. Hydrogen fuel cells have better efficiency.

 

[Eli]

Okay, here we go. According to this...

According to "Hydrogen in the Energy Sector" by Dr. Zittel; et al., when comparing energy density by weight, "hydrogen has the highest energy to weight ratio of all fuels. 1 Kg of hydrogen contains the same amount of energy as 2.1 Kg of natural gas or 2.8 Kg of gasoline." To clarify a point, hydrogen ranks last when the comparing energy density by volume. Hydrogen possesses 2.36 kWh/liter as a liquid, natural gas contains 5.8 kWh/liter and gasoline registers at 8.76 kWh/liter.

So I guess it depends on how you measure it... By weight, it has much more energy.. but by volume it does not.

I guess volume is the only one that really matters.

 

[Howard]

Powerballs + fuel cells sound like a good combo.

 

[everman]

Originally posted by: wnied
Hydrogen power as an engine instead of a fuel cell?

Sure why not? Look how well it worked for the Hindenburg.

~wnied~

It wasn't really the hydrogen that was the problem, it was the fact that the Hindenburg was coated with a gunpowder like substance which ignited.

 

[her209]

We need to look into building Mr. Fusion.

 

[Ultima]

Originally posted by: her209
We need to look into building Mr. Fusion.

Yeah, then a car-accident will level the entire city