Power Generation/Hydro Power/Part5

Below are furhter equations used for calculations involving this kind of power station:

Gross plant capacity (G.C):

$G.C=\frac{E_{potential}}{sec}$ (in Watts) ... Equation 3.5

The firm capacity (F.C) will therefore be:

$F.C=G.C\times \eta$(in Watts) ... Equation 3.6

Thus the yearly gross out put:

$Y.G.O=F.C\times 8760Hrs$(in kWh) ... Equation 3.7

We can also estimate the volume of flow per annum:

$V_{annum}=Catchmen{t}_{.}Area\times Annua{l}_{.}Rainfall\times Yiel{d}_{.}Factor$

(in kWh) ... Equation 3.8

Where:

• η = Efficiency
• m = mass (in Kg)
• g = constant ≈$9.8m.s^{-2}$
• h/H = water head height (metres)
• ρ = density of water ($m^3$)