Turning water into fuel.
11-30-2015, 08:48 PM
#16
Addict
Rennlist Member
Rennlist Member
Current production methods[edit]
Hydrogen is industrially produced from steam reforming, which uses fossil fuels such as natural gas, oil, or coal.[29] The energy content of the produced hydrogen is less than the energy content of the original fuel, some of it being lost as excessive heat during production. Steam reforming leads to carbon dioxide emissions, in the same way as a car engine would do.
A small part (4% in 2006) is produced by electrolysis using electricity and water, consuming approximately 50 kilowatt-hours of electricity per kilogram of hydrogen produced.
Hydrogen is industrially produced from steam reforming, which uses fossil fuels such as natural gas, oil, or coal.[29] The energy content of the produced hydrogen is less than the energy content of the original fuel, some of it being lost as excessive heat during production. Steam reforming leads to carbon dioxide emissions, in the same way as a car engine would do.
A small part (4% in 2006) is produced by electrolysis using electricity and water, consuming approximately 50 kilowatt-hours of electricity per kilogram of hydrogen produced.
The answer to this question depends on your lifestyle and energy consumption. As a rough calculation, if you require 3.85 kWh per day, then you'll require the following number of solar panels:
3.85 kWh (per day) divided by 7 hours of sunlight (per day)
= 0.55 kW from the solar array
If you have a 120 W panel, one of the largest units available today, then you'll need:
0.55 (kW) divided by 120/1000 (kW)
= 4.6 panels
3.85 kWh (per day) divided by 7 hours of sunlight (per day)
= 0.55 kW from the solar array
If you have a 120 W panel, one of the largest units available today, then you'll need:
0.55 (kW) divided by 120/1000 (kW)
= 4.6 panels
So you need 15 days for 1kg of H in gaseous state. And another 10 years to compress it to liquid state which BMW 7 burned. Or another option is to pressurize it in gas state to 700 bar.
One common method of obtaining liquid hydrogen involves a compressor resembling a jet engine in both appearance and principle
The hydrogen fuel is stored in a large, nearly 170 litre (45 gallon),[6] bi-layered and highly insulated tank that stores the fuel as liquid rather than as compressed gas, which BMW says offers 75% more energy per volume as a liquid than compressed gas at 700 bars of pressure.[7] The hydrogen tank’s insulation is under high vacuum in order to keep heat transfer to the hydrogen to a bare minimum, and is purportedly equivalent to a 17-metre (56 ft) thick wall of polystyrene Styrofoam.[8]
11-30-2015, 08:58 PM
#17
Hydrogen would be a great fuel. a few problems.
it needs to be very cold to be in liquid form which makes storing it expensive.
Or it has to be compressed at very high pressures 3,000 psi or greater to have enough energy on board to make it practical to move a vehicle around (expensive)
Extracting it from water sounds great but the H20 bond is very strong...thus it takes a lot of energy to "break" the bond (as others already mentioned).
What we really need is a way to store hydrogen in a liquid form at room temperature. Ironically we have that....its called gasoline and that is why we use it. They hydrogen bond in gasoline is not nearly as strong as the water bond...thus very little energy to go boom.
it needs to be very cold to be in liquid form which makes storing it expensive.
Or it has to be compressed at very high pressures 3,000 psi or greater to have enough energy on board to make it practical to move a vehicle around (expensive)
Extracting it from water sounds great but the H20 bond is very strong...thus it takes a lot of energy to "break" the bond (as others already mentioned).
What we really need is a way to store hydrogen in a liquid form at room temperature. Ironically we have that....its called gasoline and that is why we use it. They hydrogen bond in gasoline is not nearly as strong as the water bond...thus very little energy to go boom.
12-01-2015, 01:16 AM
#18
Drifting
Thread Starter
Voith that's interesting information.
How about using water injection with inonized water and a high powered ignition system like blue Phoenix ignition to light off the gas/water mix. Blue Phoenix YouTube video shows water igniting over a spark plug in the demonstration. It's interesting.
How about using water injection with inonized water and a high powered ignition system like blue Phoenix ignition to light off the gas/water mix. Blue Phoenix YouTube video shows water igniting over a spark plug in the demonstration. It's interesting.
12-01-2015, 12:13 PM
#19
Burning Brakes
Perhaps there is another factor that needs to be discovered or rediscovered to make it work. If you had a solar setup at your house that made hydregen fuel during the day and have wind power setups depending on where you live, or both. Then fill up at home. Maybe it doesn't have to be a device on the car. Perhaps the sun and wind could provide that energy to convert water into separate oxygen and hydrogen molecules.
12-01-2015, 12:21 PM
#20
Burning Brakes
Maybe 10 years ago, BMW made a variant of their mighty V12 that would run on either straight gasoline or hydrogen.
In H-mode it would make around 250hp, IIRC, around 60% or so of the standard engine's gasoline output since the engine couldn't be optimized to run JUST on H-juice.
Their slogan was "We're ready for the world when the world is ready" (for Hydrogen fuel).
https://en.wikipedia.org/wiki/BMW_Hydrogen_7
In H-mode it would make around 250hp, IIRC, around 60% or so of the standard engine's gasoline output since the engine couldn't be optimized to run JUST on H-juice.
Their slogan was "We're ready for the world when the world is ready" (for Hydrogen fuel).
https://en.wikipedia.org/wiki/BMW_Hydrogen_7
I kept thinking it would suck to park your care for a long time and come back to an empty tank.