The maintenance of these hydrogen-cooled turbo generators also leads to one of the more exciting features of hydrogen: its ability to combust in air at hydrogen concentrations between 4% and 74%.

H pur = Purity of Hydrogen in Generator Casing (%) A bal = Balance of Impurity (air) in Generator Casing (%) At the Aguirre plant, the hydrogen-cooled generator casing purity averaged at 96.9 percent.

Hydrogen cooled generators also have less windage/friction loss than air-cooled generators. Windage, which is caused by friction between the hydrogen and the rotor, can account for 30-40 percent ...