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kraigandrews
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Homework Statement
Pumped Energy Storage. A water reservoir has surface area A and depth D. The water flows down pipes and through turbines to generate electric power. The bottom of the reservoir is at height H above the turbines. The depth D of water in the reservoir decreases at a rate δ. (a) Calculate the total gravitational potential energy U. (b) Calculate the available power P = |dU/dt|, i.e., available for conversion to electric power.
DATA: A = 8 ×10^5 m2; D = 14 m; H = 102 m; δ = 0.55 m per hour; density = 1.0 ×10^3 kg/m3.
Homework Equations
U=mgh
P=U/T
The Attempt at a Solution
U=mgh
U=(density*area*depth)*g*h =1.1206E13 J
then 1.1206EJ/((1/3600)*.55)=7.3355E16 W
but that's not correct. what's wrong here