Finding the Power Produced by a Hydroelectric Generator

AI Thread Summary
The discussion focuses on calculating the power produced by a hydroelectric generator using given parameters. The volumetric flow rate of 10 m³/min is converted to 1/6 m³/s, and the mass flow rate is determined to be 166.67 kg/s. The potential gravitational energy formula is applied, resulting in a power output of approximately 122,627.45 Watts. Participants express confidence in the calculations, affirming their correctness. The thread highlights the importance of unit conversions and applying the correct formulas in hydroelectric power calculations.
bieon
Messages
32
Reaction score
3
Homework Statement
A hydroelectrical power plant receives 10 m³/min water from a dam, where the water level is 75 m above the turbine discharge water level. Determine the electric power generated.
Relevant Equations
Refer Below
My Attempt So Far:

1. Write down all information:
Q=10m³ /min
h=75m

2. Change 10m³ /min to m³ /s

10m³ /min × min/60s =1/6 m³ /s
3. Change Volumetric Flow Rate to Mass Flow Rate

=ρQ
=1000kg/m³ × 1/6 m³ /s
ṁ=166.67 kg/s

4. Apply Potential Gravitational energy but replacing the Mass with Mass Flow Rate

P=ṁgh
P=166.67kg/s × 9.81m/s² × 75m
P=122627.45WattThese are my attempt but I am unsure if my answers are correct?​
 
Last edited:
Physics news on Phys.org
Looks good.
 
  • Like
Likes bieon
gleem said:
Looks good.
Thank you!
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top