Hydrogen today has become an acceptable fuel for many energy applications and systems. It is necessary to define basic safety specifications, and ways to deal with this fuel. It is important to be able to use hydrogen in the same proportion as other fuels, without any added risks. The identification of hydrogen safety should include understanding of its important combustion phenomena. Because hydrogen has low liquid state temperature (-212°C), it is sensitive to the vessels and containers' walls, and it could cause thermal decline and condensation to it. The identification of safety hazards for any fuel is a very complex mission and requires analysis of high-quality technical information, compared with information similar to other types of fuel. The conditions of ignition, fire, and explosion should be carefully studied and evaluated to ensure that the fuel is actually safe to be used. From here, it can be said that hydrogen may be safer than conventional fuels when used in some applications, and may become more dangerous than most of them in other applications.Because of the depth and importance of this subject, it has been dealt with in great depth. Scientific literature is filled with very large numbers of papers that are taught and addresses several safety points and safety considerations when using hydrogen. In the following pages, efforts were made to summarize and explain what many researchers have studied in the field of hydrogen safety.

Hydrogen today has become an acceptable fuel for many energy applications and systems. It is necessary to define basic safety specifications, and ways to deal with this fuel. It is important to be able to use hydrogen in the same proportion as other fuels, without any added risks. The identifica...