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You cannot run a car or anything else this way, because it takes more energy to extract the hydrogen from the water than you get from burning the same hydrogen.
Let me start off by saying that as we learn in Physics class, the universe tends to take areas where there is lots of energy, and dissipate it to areas of lower energy. Thats why it is easy to burn something, releasing energy, but difficult to turn ash back into wood, thats also why it is hard to store energy in things. Batteries have self-discharge problems, and reactive chemicals react over time with other things.
Water, like ash, is a byproduct of 2 hydrogens and a oxygen bonding together. By themselves, hydrogen has only one valence electron and it wants 2 or none. It will do some work (power!!!) to get rid of it, or find another. Oxygen, however, has 6 valence electrons, and it wants 2 more so it can have 8! It can then bond with 2 hydrogens, and the hydrogens share their electron with the oxygen. Thats technically calls covalent bonds, and they can be very strong. Energy was released when the '2H' and 'O' snapped together like magnets. When they snap together to make water, they get hot. In fact, have enough of that happening, and you've got a bit of a HHO flame on your hands!!! To rip the water apart, we need to some energy input! That can be done with electrolysis.
Anyway, my point is that water does not have any real amount of usable energy within it, because it is like ash. It is easy to make, but can take quite some effort to break. We can really cleanly extract the energy from HHO gas with a fuel cell, and that will force the hydrogens and oxygens to do some work before allowing them to combine, that way we get usable electricity instead of just burning it. Making lots of HHO via electricity is also very slow and painful, and requires about 1.25 buttloads of energy per HHO gas to accomplish :).
If, as others have asked, you wish to have water broken down to hydrogen and oxygen. Then, you wish to reunite the hydrogen (fuel) and oxygen (oxidizer) in the ICE (internal combustion engine).
In other words, you wish to know the cost to create fuel and oxidize the fuel all within the confines of said vehicle.
Let's place the vehicle in the box. What will move this box? Energy. Yes, energy from outside of the box or released from the confines of the box. But in your proposal, the energy source is in the box as well as the device that will be releasing this energy. There is no energy leaving the box so there is no energy to move the box. The energy is just moving around within the box. Your system is an adiabatic process. If energy was being loss from the box we would have to put energy back into the box. There would be no energy to propel the box. Yes, in an imperfect situation waste heat would be lost in the form of a temperature rise within the box.. This energy could be used to propel the box. It would not be a very large amount since we are using the remaining energy to create energy.
In the conventional vehicle, the energy source (oxidant) is contained within the confines of the vehicle. As such, energy is being released within the box. This energy can be released from the box in the form of wheel torque. Again there are inefficiencies. The ICE is not 100% efficient. Some of the energy released is wasted. It is not productive. Wait, but some of the energy lost can be used to heat the vehicle. But, that benefit is only worth while when there is energy leaving the vehicle when the surroundings are colder than the temperature we like to maintain in the vehicle. When it is warmer than the temperature we like to maintain within the vehicle we need to take some of the energy released to pump the heat out of the vehicle that is entering the vehicle.
Yes, trillions of BTU's are being released every second, as (waste heat). It is warming the environment. It is compounding the global warming problem.
Consequently. you would not want to build the proposed device for it would not move.
Yes there are Vehicles that run on Hydrogen but no vehicle has a built in system for breaking water down to it's base elements. To do so and capture the hydrogen and oxygen requires a lot of power The equipment is also too large to fit in most vehicles. The large amount of power needed for the process means the equipment isn't vary mobile.
how much it cost?
First you gotta get your engine converted to handle hydrogen. That could run you several thousand dollars. You'll also need a safe way to store and carry it in the vehicle. Also not cheap. Not to mention the price of buying the hydrogen. An at home plant to convert water to hydrogen would cost hundreds of thousands of dollars and that doesn't even get into the dedicated power line you'll need to install to run it and the cost of electricity. Then you gotta consider the government regulations and taxes you'll have to pay to have such a setup at your home. Assuming you will be allowed to product large amounts of a highly explosive and extremely dangerous gas. In then end it would be better to convert a vehicle to all electric and install a charge station at your house.
If you are trying to run a car on alternative fuels, hydrogen is *VERY* expensive - it costs a lot to make, to transport and to store.
If you are looking to convert a car, try this alternative fuel:
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Posted:Jan 22, 2015
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