“H2 definitely is used to cool synchronous machines”
thanks. do you by any chance have a reference?
thanks. do you by any chance have a reference?
No reference needed: H2 (as a low pressure gas) is used inside almost every medium and large sized generator worldwide.
The H2 transfers the heat naturally created inside the generator windings by electric resistance to the pure water heat exchangers in the back of the generator. (Outside the generator, auxiliary water cools that heated pure water.) We need pretty exotic oil, hydrogen and air seals to keep the hydrogen inside, the oil in the bearings, and the air outside, but the technology is used in thousands of plants worldwide. H2 is used because it has good heat exchange characteristics, is clean (non-electrically damaging) and (most important) creates little “air friction” inside the generator casing with the rapidly spinning rotor.)
An explosion could easily affect 50 workers - but still, I'd suspect a flammable gas building up in an enclosed space
Natural gas? Maybe, but it'd have to have built up inside somehow to explosive levels without anybody noticing, evacuating and clearing out and stopping hot work. Could be of course, but not in any turbine building I've worked inside of: We're always checking for gasses and checking out before permitting work in enclosed spaces, hot work, epoxying, painting, etc.
I'd be more suspicious of explosive dust being ignited, but as others have pointed out, it's unlikely to see that coal dust in a Connecticut site.
Here are some examples.
http://www3.toshiba.co.jp/power/english/thermal/products/generators/hydrogen.htm
http://www.energy.siemens.com/hq/en/power-generation/generators/sgen-2000H-series.htm
http://www.gepower.com/prod_serv/products/generators/en/hydrogen_cool.htm
“H2 definitely is used to cool synchronous machines”
***thanks. do you by any chance have a reference?***
Check out this course in electrical auxiliaries..
http://canteach.candu.org/library/20050712.pdf