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This is a theoretical question for if we make Hydrogen Cell Fuel a clean large scale energy solution.Theoretically we would be using the ocean as we already have serious problems with fresh water supplies for meeting our living needs.
1: What will dumping all that water into the atmosphere of urban areas do?
2: What will happen in the places we take the water?
3: What about all that oxygen released when making hydrogen fuel from water and is that going to become an issue?
4: If we use this kind of solution can we power the hydrogen cell fuel process like a dam?
5: Theoretically if we were to use hydrogen cell fuel through the ocean we would have to first purify it, correct? If so could we use the movement of the boiling water as energy as well?
6: What could we do with the left over salt? Is there a way to gain energy through the left over salt?
Only a little more than we already get from burning gasoline and other fuels. Probably significantly less than daily evaporation. However, there are notes of potential negative impacts from water vapor in Jet Streams. H2 jet fuel might increase the high altitude water vapor.
If it is used locally, then most of it will come back down in the form of rain. There are concerns of subsurface water depletion, especially in arid areas (where one might make solar-electric generators).
NO!!!! It gets recombined with Hydrogen to form Water (except for a small amount of H2 loss). Keep in mind that atmospheric oxygen is about 20%. In a century of burning fossil fuels, we've increased the total CO2 content (percent) in the air by about 0.02%.
Perhaps. However, we would need a good method to store the hydrogen, either as high pressure gas, or low pressure cold liquid (plus recovery system). Dams are effective because the relatively small containment structure and relatively large reservoir of water. And, in most cases, they are self-filling. Ideally, one would not produce more hydrogen than would be required for a few days of usage, unless one uses a seasonal power source such as solar.
Maybe. However, one of the problems with water is that it is a relatively poor conductor of electricity. Various salts are added to improve the conductivity. Saltwater already contains an ionic salt. The biggest problem with doing electrolysis on salt water is that chlorine gas can be also generated in the process which would be undesired, unless one could also collect and utilize the chlorine. using NaOH or KOH as a conductive salt is far less likely to create undesired gasses.
QuoteIf it is used locally, then most of it will come back down in the form of rain. There are concerns of subsurface water depletion, especially in arid areas (where one might make solar-electric generators).Would it make any difference to use a pipe quite a bit further under the surface of the water?
As you would have a cycle. Generate Hydrogen. Burn to make water... Water goes back to ocean. Thus, you can not drop the ocean levels. You can look up the volume of the ocean, but it is quite large.I don't have the workability temperatures of the bronze, but it can get much higher than the boiling point of water if you are planning on making boilers. The melting point is about 1866°F. While there is some line loss with transmitting electricity, for the most part it will be more efficient to use electricity wherever applicable rather than multiple transformations. Look up on the internet Bloom Energy and Bloombox. There are some good YouTube videos with some basic information.If you have a salt-free solution for electrolysis,Then you would add something like Sodium Hydroxide (NaOH) or Potassium Hydroxide (KOH) to avoid the production of chlorine gas. The lye would act as a catalyst and would not be consumed. So, you could add the lye once, and then keep adding clean water. You need energy to make the hydrogen. No sense in supplying fresh water to a house and expecting the owners to magically make their own energy. Well, that is unless you are also planning on supplying a nuclear reactor to every household.There are some people with home wind or solar generators that have experimented with also making and storing hydrogen gas. But, having a million homes with personal hydrogen generators would be a good formula for a disaster.
As BC pointed out, there are no hydrogen mines. Hydrogen has to be manufactured by processing something that is a compond of hydrogen to release the pure hydrogen. This processing consumes a larger amount of energy than the manufactured hydrogen is able to produce.
You can't have "free energy" like you are hoping.
As far as the hydrogen fuel cell cars. They have a hydrogen tank, either high pressure gas at room temperature, or low pressure liquid at very cold temperatures. Or, there have been efforts to make a matrix to absorb the hydrogen gas, requiring lower pressures. The cars would fill the tank with hydrogen at a filling station, much like you fill your car with gasoline.
A rocket must carry both hydrogen and oxygen because there is no access to oxygen in outer space. However, on the surface of Earth, there is not that limitation. It is easier to just transport the hydrogen. Release the oxygen into the atmosphere, then use atmospheric oxygen for the reaction.
Many cities use elevation to create water pressure. In a hilly region, reservoirs are put on the top of hills. It often takes energy to pump the water up to the reservoirs. If you put turbine generators into the water distribution lines, you would lower the pressure going to the houses. This might be appropriate in the areas with a significant elevation changes, but it would not be appropriate in more flat locations, or in places with inadequate size of distribution lines.
You can't gain energy by artificially raising and lowering water. Typical hydroelectric generates depend on a natural force to raise the level of water. For example rain at a higher elevation, and a mountain stream that takes the water down the mountain.
There are also some underwater ocean currents driven by subtle changes in seawater density, either due to different salinity, or different temperatures and densities of the water. And, of course, also waves and tides that could potentially also be used to generate energy.