Advantages of Hydrogen as an Engine Fuel

Hydrogen can be used as a motor fuel, whereas neither nuclear nor solar energy can be used directly. Nuclear power requires heavy shielding to keep the neutrons away from people, but is too heavy for cars. It can be used in ships especially submarines 

Hydrogen is a gas at 20.13 K therefore, there is no problem in starting an engine at the coldest winter temperatures, i.e., instant start-up. 

The thermodynamic cycle for hydrogen is much closer to the ideal Otto cycle than for either a gasoline or a diesel engine. In addition, the compression ratio can be higher. 

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