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Hydrogen fuel, when produced by renewable sources of energy like wind or solar power, is a renewable fuel. [ 174 ] [ 175 ] Hydrogen produced from nuclear energy via electrolysis is sometimes viewed as a subset of green hydrogen , but can also be referred to as pink hydrogen .
Hydrogen can be deployed as a fuel in two distinct ways: in fuel cells which produce electricity, and via combustion to generate heat. [58] When hydrogen is consumed in fuel cells, the only emission at the point of use is water vapor. [58] Combustion of hydrogen can lead to the thermal formation of harmful nitrogen oxides emissions. [58]
The theoretical maximum power output from a hydrogen engine depends on the air/fuel ratio and fuel injection method used. The stoichiometric air/fuel ratio for hydrogen is 34:1. At this air/fuel ratio, hydrogen will displace 29% of the combustion chamber leaving only 71% for the air.
Green hydrogen is being touted around the world as a clean energy solution to take the carbon out of high-emitting sectors like transport and industrial manufacturing. The India-led International ...
1938 – Igor Sikorsky from Sikorsky Aircraft proposes liquid hydrogen as a fuel. 1939 – Rudolf Erren – Erren engine – US patent 2,183,674 – Internal combustion engine using hydrogen as fuel. 1939 – Hans Gaffron discovers that algae can switch between producing oxygen and hydrogen.
Hydrogen is not a primary energy source, because it is not naturally occurring as a fuel. It is, however, widely regarded as an ideal energy storage medium, due to the ease with which electricity can convert water into hydrogen and oxygen through electrolysis and can be converted back to electrical power using a fuel cell or hydrogen turbine. [3]
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