Speed Rise Following Load Reduction Calculator
Posted by Dinesh onOnline calculator to calculate sudden speed rise in the electrical system that a hydraulic turbine serves using turbine speed drop formula.
Speed Rise Following Load Reduction Calculation
Formula:
nt/n (in USCS) = [1 + 1,620,000TtPt / WR2n2 (1 + h/H)3/2]1/2
nt/n (in SI) = [1 + 365,000TtPt / GD2n2 (1 + h/H)3/2]1/2
where,
nt - is the speed, at the end of time Tt
Tt - the time interval
Pt - reduction in load
WR2 is the product of the revolving parts weight, lb, and the square of their radius of gyration, ft
n - is the speed
h is the head rise caused by the retardation of the flow
H is the net effective head before the load change
GD2 is the product of the revolving parts weight, and the square of their diameter of gyration, m.