The Darcy–Weisbach equation states that the power-generating capacity in a hydroelectric system that is lost due to head loss is given by P=??QH, where ? is the efficiency of the turbine, ? is the specific gravity of water,Q is the flow rate, and H is the head loss. Assume that ?=0.85 ± 0.02, H=3.71± 0.10m, Q=60± 1m3/s, and ?=9800N/ with negligible uncertainty.

a. Estimate the power loss (the units will be in watts), and find the uncertainty in the estimate.
b. Find the relative uncertainty in the estimated power loss.
c. Which would provide the greatest reduction in the uncertainty in P: reducing the uncertainty in ? to 0.01, reducing the uncertainty in H to 0.05, or reducing the uncertainty in Q to 0.5?


Trades & Technology

You might also like to view...

Water with nutrients added is called a(n) ____________________

Fill in the blank(s) with the appropriate word(s).

Trades & Technology

How long can power be retained in the high voltage system once it has been disabled?

A) 90 seconds B) 4 hours C) 10 minutes D) None of these

Trades & Technology

Explain how a photovoltaic cell converts solar energy into voltage and current

What will be an ideal response?

Trades & Technology

An oblique drawing reveals the three basic viewing planes.

Answer the following statement true (T) or false (F)

Trades & Technology