What Type of Energy is Hydrogen Energy?

[LeSkylar]

Hydrogen energy is a secondary energy source. Below is a detailed introduction to the main characteristics of hydrogen energy: Weight and Thermal Conductivity: Under standard conditions, its density is 0.0899g/L, making it lightweight. The thermal conductivity of hydrogen is 10 times higher than that of most gases, indicating strong thermal conductivity. Combustion Performance: It has strong combustion performance. When mixed with air, its flammable range is broader. Additionally, hydrogen has a high ignition point and fast combustion speed. Environmental Value: Hydrogen energy is a clean energy source. Apart from producing water and a small amount of nitrogen hydride, it does not generate environmentally harmful pollutants such as carbon monoxide, lead compounds, or particulate matter. Moreover, replacing fossil fuels with hydrogen can significantly reduce the greenhouse effect.

[Oliver]

Hydrogen energy, to put it bluntly, is a secondary energy source. You have to obtain it through the conversion of other energy sources, such as electrolyzing water to produce hydrogen, which relies on electricity. What I value most is that it turns into water after combustion, with absolutely no tailpipe pollution, making it far more environmentally friendly than gasoline-powered vehicles. In recent years, Japan and Germany have been vigorously building hydrogen refueling stations, indicating that this direction has potential. However, storage and transportation are indeed troublesome, requiring high pressure or liquefaction, with high safety requirements. Overall, hydrogen energy can both power fuel cell vehicles and serve as an industrial fuel, making it a clean and promising transitional energy source.

[GriffinDella]

In my eyes, hydrogen energy is one of the top performers among new energy sources. It's not a primary energy source like coal or oil that can be used directly after extraction, but rather a secondary energy produced by using solar or wind power to electrolyze water. Staff at the hydrogen refueling station near my home mentioned that hydrogen's heat of combustion is three times higher than gasoline, making it particularly cost-effective for trucks. However, the production and storage costs are indeed high, requiring special material tanks, which is why its adoption is slow currently. In the long run, if we can efficiently produce hydrogen using nuclear or biomass energy, it might just become mainstream.

[LaAriana]

I think hydrogen energy is the upgraded solution for human energy. Essentially, like electricity, it is a secondary energy source that needs to be converted from other energy sources. The most amazing thing is that when it works in fuel cell vehicles, the exhaust pipe only emits water and no carbon, which is crucial for improving smog. I heard that the Toyota Mirai can run 850 kilometers, which is much better than electric vehicles in terms of range. However, there are too few hydrogen refueling stations now, so this bottleneck needs to be addressed first.

[OIsabella]

Energy professionals all know that hydrogen is a secondary energy source, which must be produced from primary energy. Based on my measurements, electrolyzing water to produce hydrogen consumes 50 kWh of electricity to generate just 1 kilogram of hydrogen, indicating a relatively low conversion efficiency. However, it remains irreplaceable in environmental protection, especially in sectors like aviation and shipping that are difficult to electrify. Even NASA rockets use liquid hydrogen! The issue lies in the fact that the construction cost of hydrogen pipelines is twice that of natural gas pipelines, which requires technological breakthroughs to resolve.