Hydro P.P. run @ 600 rpm,8pole, Nucler P.P @ 1500rpm 4 pole ,
ThermlP.P @ 3000 rpm 2 pole.Why this diffrence??? when we can
generate electricity @ 600 rpm then Why we had incresed speed
in NPP & TPP???
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Answer Posted / 7anoter4
In my opinion, the fuel consumption depends-mainly- on the
load and the losses. Most of losses are copper losses and
iron core losses.
These losses does not depends on rotor velocity directly-
but since the rotor speed will increase ventilation and so
increase the cooling one may increase the current for the
same conductor cross section and so the losses could be
more but as a percentage -referring to the load-will be
less. Only bearing friction and ventilation will be more.
However as the total efficiency is higher for higher
velocity these losses are not significant. In no way the
consumption will be more-usually less-for turbine drive
generator. For Diesel-Generator will be more, a little, but
this still does not justified the equipment and
installation elevated cost.Diesel Motor low-speed can use
cheap oil-slow-burning oil.
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