Hydrogen can also serve as fuel for internal combustion engines, but unlike with fuel cells, will produce tailpipe emissions and is less efficient. Learn more about fuel cells. The energy in 2.2 pounds (1 kilogram) of hydrogen gas contains about the same as the energy in 1 gallon of gasoline. Because hydrogen has a low volumetric energy density, additional steps are needed to store enough hydrogen onboard fuel cell vehicles to achieve the driving range of conventional vehicles.
Wiktionary (0.00 / 0 votes) Rate this definition: zeppelin (Noun) A type of large German dirigible airship of the early 20th century designed to carry passengers or bombs. Zeppelin (ProperNoun) A German manufacturing company, famed for building the zeppelin airships. Origin: Named after Ferdinand, Count von Zeppelin.
Zeppelin was invented in 1900 by a military officer of German origin named Count Ferdinand von Zeppelin. It was a stiff framed airship, LZ-I that flew on 2nd July, 1900 carrying five passengers near Lake Constance in Germany. Zeppelins were used in the times of peace as well as war.More than 100 zeppelins were used in the World War I. Although Zeppelin structure was made of aluminum it was covered with cloth.It had hydrogen cells that were seventeen in number and two 15- horsepower Daimler internal combustion engines each helped in turning the two propellers.t was a stiff framed airship, LZ-I that flew on 2nd July, 1900 carrying five passengers near Lake Constance in Germany. Zeppelins were used in the times of peace as well as war. More than 100 zeppelins were used in the World War I.