Although hydrogen is the most abundant element on Earth, it is primarily associated with the oxygen in water, one of the strongest chemical bonds known. This means it is much more energy to split water into hydrogen and oxygen of about 120 MJ / kg increases. The same amount of energy released when oxygen and hydrogen to recombine (burning) of water. Because the same amount of energy, you may ask?
The first law of thermodynamics states that if the energy is used to bring a systemone state to another must be removed the same amount of energy to make it back to its original condition and regardless of how it is done. If there were no differences in energy applied and removed, then we could create energy from the null) (less energy input in order to create a system in a state other than that which is removed) (and exits into it even before the original state - a level Mobile eternal.
Thus, we consider an ideal hydrogen(Water) in the engine, with which we have) in water poor on one side and the same water (primarily as a vapor, but also as a condensation of water at home is placed on the side. So the states will be the first law of thermodynamics, it is not possible with any mechanical power developed on the motor - which would be created out of nothing!
If there is a production of mechanical energy in any case, it must have this energy is included as an entrance way. This is exactly what happens withexperimental car, which has been said, in the water run. No, they were running on battery power in the system that was originally loaded from an external source. The assertion is nothing but the inventor, namely to explain the first law of thermo to be valid. None of the "inventors" never made such a statement was? No, because they never considered the first law and not "are the powers that they believed that the inventor" and, therefore, would be threatened, detained orare even killed - what a waste, if it is true.
Many researchers, automobile manufacturers, inventors mistakenly forward, etc, to make hydrogen as an energy source. From the above we can understand, though, that everything that could develop hydrogen energy in each type of machine or device that comes from other sources that were required to produce, prepare, and that of hydrogen . Probably these were other sources of fossil fuels, so where is the environmental benefit? Moreover, the total efficiencyhydrogen production is significantly less than 100%, expressed according to these sources more energy than it can the hydrogen during combustion. Therefore, a hydrogen energy system conversion, and not a source of energy. It is in relation with the environment, shifting the pollution of the engine, with plants producing hydrogen - has not been eliminated, as erroneously claimed by many.
How about using the solar energy into electricity with photovoltaic cells and produceElectricity, which in a process of electrolysis to split water into hydrogen and oxygen? Well, you know that the typical efficiency of galvanic cells by 25% and 60% of the electrolysis and thus the total efficiency of 0.25 x 0.6 = 0.15 => 15%, then you need only hydrogen and oxygen but above mainly of hydrogen gas is very difficult to manage. Its volume is about ten times higher than that of air at atmospheric pressure and radiates through most metals. Compress the hydrogen to minorsVolume takes a lot of energy (it must be cooled, that) as waste heat. In order to distribute the costs of energy consumption and eventually, the overall efficiency can also be negative, or no more than a few percent. All this has to do with entropy. If you do not know what it is, read my article: "What is entropy" for an explanation.
Knowing that the world is burning fossil fuels to the equivalent of about 100 million barrels of oil per day (60% coal is still theThe main source of energy in the world). A barrel is 167 liters, about 140 kg of mass and energy content is about 40 MJ / kg, while the average solar intensity at sea level in size from a few hundred watts per square meter (about what to add the human body heat). Want to calculate how large area of photovoltaic cells would be needed to replace say, only 1% of our current consumption of fossil fuels? Even more, you want to pay for this?
They are expected to fuel cells,The oxygen and hydrogen, converting them into water and electricity without combustion. Once again, we talk about energy conversion, because where the oxygen and hydrogen is that? A fuel cell is therefore not a source of energy. There are concepts for fuel cells that run on natural gas, however, such as methane. Since the output is water (steam) and non-methane original, you can read the first network-power generation, and it is done. However, shows that the cycleThe efficiency is slightly lower than the combustion of methane directly into a combustion engine. Fuel cells other causes far less polluting than the combustion of alternatives, but the economy remains in favor of direct combustion. Much you pay for your car clean?
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