Generator Hydrogen Coolers

[FredRosse]

We have a hydrogen cooler for a large electric generator, which requires 2000 GPM of cooling water at 85F. I know the heat load. Evaluating cooler performance with new coolant properties an new coolant temperatures, I need to know the Hydrogen inlet/outlet temperatures.

Does anyone know the typical Hydrogen temperatures for large (300 - 1000 Megawatt) pressurized hydrogen cooled machines. Have the temperatures become fairly standardized over the years (like so many parameters for well evolved machines) or are they all over the place.

I am not able to find this data on this 450 MVA machine manufactured in Japan.

Thanks in advance for any help

 

[vpl]

Is it possible to measure one of the hydrogen temperatures? Then you could use Q=[ṁ]c_p[δ]T to find the other.

Patricia Lougheed

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[FredRosse]

The machine is in the installation stage, so no real operating data is available as yet, and I need to do the cooling details well before operation.

 

[racookpe1978]

More later.

 

[casflo]

For a 1000 Mw electrical generator the hydrogen temperatures at the ends of the cooler are 158F and 109F.
The cooling water flow is 4000gpm and the temperature 95F.
However the final hydrogen temperatures will depend also on the hydrogen flow and the cooler transfer area.