windage loss การใช้

• The windage losses also increase heat losses of the generator and the associated cooling problems.
• This is because there is virtually no iron magnetization loss and very little windage loss in the motor.
• A purity drop from 97 to 95 % in a large generator can increase windage losses by 32 %; this equals to 685 kW for a 907 MW generator.
• Fresh water make-up ( M ) is supplied to the tower basin to compensate for the loss of evaporated water, the windage loss water and the draw-off water.
• Its thermal conductivity is higher than all other gases, it has high specific heat capacity, low density and therefore low viscosity, which is an advantage for rotary machines susceptible to windage losses.
• The rotor spins in a sealed chamber cooled with hydrogen gas, selected because it has the highest known heat transfer coefficient of any gas and for its low viscosity, which reduces windage losses.
• Every reduction in the purity of the hydrogen coolant increases windage losses in the turbine; as air is 14 times more dense than hydrogen, each 1 % of air corresponds to about 14 % increase of density of the coolant and the associated increase of viscosity and drag.